CN103425783A - Method and device for progressive transmission of spatial data - Google Patents

Method and device for progressive transmission of spatial data Download PDF

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CN103425783A
CN103425783A CN2013103670212A CN201310367021A CN103425783A CN 103425783 A CN103425783 A CN 103425783A CN 2013103670212 A CN2013103670212 A CN 2013103670212A CN 201310367021 A CN201310367021 A CN 201310367021A CN 103425783 A CN103425783 A CN 103425783A
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abbreviation
spatial data
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CN103425783B (en
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董福田
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Guangdong Chaoqing Intelligent Computing Technology Co ltd
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Abstract

The invention discloses a method and a device for processing, simplification and progressive transmission of spatial data. The method comprises the following steps of according to preset view control parameters, analyzing mutual relation among the pixels needing to be drawn of all coordinate points in the spatial data when the coordinate points are displayed in a view window determined by the view control parameters; according to the analyzed result and set processing methods corresponding to processing types, processing the spatial data, wherein the processing process comprises one or a combination of analysis, selection, simplification and progressive transmission of the spatial data. The method disclosed by the invention has the advantages that the processing process of the spatial data can adopt the mutual relation among the pixels needing to be drawn of all the coordinate points in the spatial data when the coordinate points are displayed in the view window as the basis, so that the efficiency and the accuracy rate in the processing process are improved.

Description

Progressive transmission of spatial data and device
The application is that denomination of invention is dividing an application of " method and apparatus of spatial data processing, abbreviation and progressive transmission ", application number are 201210104250.0, the applying date is on April 11st, 2012 China's application, and enjoys the right of priority of China's application that application number is 201110093024.2, the applying date is on April 14th, 2011.
Technical field
The present invention relates to Spatial Information Technology, computer graphics and computer operating system field, relate in particular to method and the device of processing, abbreviation and the progressive transmission of spatial data.
Background technology
The view of spatial data means that mode mainly shows by electronic chart, electronic chart is the visual map that spatial data is shown on electronic curtain by certain hardware and software, is the process that spatial data shows at the upper rasterizing of electronic curtain (view window).
View is the interface of selecting spatial data to show in view window according to given space condition.The process of existing view display space data is exactly the process of the rasterizing of spatial data: the spatial data that at first by spatial data index, will meet given space condition takes out to be passed to the spatial data user through transmission medium and asks transmitting terminal, then after the spatial data of spatial data being carried out to a series of geometric transformation and processing, be depicted as a width two-dimensional grid image, on screen, show or output, as computer screen shows, printout and synthetic image file output etc. on paper.
Fast development along with Spatial Information Technology, obtain high resolving power, high-precision spatial data becomes possibility, the widespread use of based on network spatial information is to GIS(Geographic Information System, Geographic Information System) development and application have brought opportunity, have also brought challenge.The increase of the relatively existing network bandwidth, the data volume of spatial information transmission is explosive growth, thereby is unfavorable for spatial data is carried out to real-time processing, and the efficiency in processing procedure and accuracy rate are all lower.Make the choosing of massive spatial data, abbreviation, transmission, demonstration, analysis become restriction Geographic Information System and relevant industries to develop main technical bottleneck.
Summary of the invention
In view of this, the invention provides the method and apparatus of a kind of effective spatial data processing, abbreviation and progressive transmission.
(1) the present invention has disclosed a kind of spatial data processing method, comprising:
Mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data;
According to above-mentioned analysis result, according to disposal route corresponding to processing type of setting, process spatial data.
Preferably, institute's view control parameter comprises: the height of the width of the outsourcing rectangle of view window and the outsourcing rectangle of view window.
Further, when described view mode is two-dimensional model, described view control parameter also comprises: the rectangular extent of the spatial data shown in described view window.
Further, when described view mode is three dimensional pattern, described view control parameter also comprises: viewpoint parameter and projective parameter, and described viewpoint parameter comprises the vector that target location that position, the viewpoint of viewpoint in world coordinate system is observed and virtual camera make progress; Described projective parameter comprises: rectangular projection and perspective projection.
Mutual relationship between the pixel that will draw while preferably, showing in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data comprises:
Obtain the length under the coordinate system of the spatial data of a coordinate unit representative in view window according to described view control parameter;
Mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter according to each coordinate points in described length analysis space data.
Preferably, the length obtained under the coordinate system of the spatial data of a coordinate unit representative in view window according to described view control parameter comprises:
Length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
Wherein ViewWidth is the width of view window, and ViewHeight is the height of view window, and vWidth is the width of the rectangular extent of the spatial data that shows, and vHeight is the height of the rectangular extent of the spatial data that shows;
VXLength is illustrated in the length under the original coordinate system of the spatial data of a coordinate unit representative of X-direction in view window, and vYLength is illustrated in the length under the original coordinate system of the spatial data of a coordinate unit representative of Y direction in view window; The perhaps length under the original coordinate system of the spatial data of a coordinate unit representative in view window using the minimum value in vXLength and vYLength, maximal value or mean value.
Mutual relationship between the pixel that will draw while preferably, showing in the determined view window of described view control parameter according to each coordinate points in described length analysis space data comprises:
The pixel that 2 coordinate points PA in the setting space data and PB will draw while showing in the determined view window of described view control parameter is respectively PAV and PBV;
The coordinate that deducts the X-axis of PB with the coordinate of the X-axis of described PA takes absolute value, and is assumed to be dx; The coordinate that deducts the Y-axis of PB with the coordinate of the Y-axis of described PA takes absolute value, and is assumed to be dy;
If dx is less than vXLength, dy is less than vYLength simultaneously, and the relation of PAV and PBV is for overlapping;
If dx equals vXLength, dy is less than vYLength simultaneously, and the pass of PAV and PBV is adjacent;
If dy equals vYLength, dx is less than vXLength simultaneously, and the pass of PAV and PBV is adjacent;
If dx equals vXLength, dy equals vYLength simultaneously, and the pass of PAV and PBV is to offset;
If dx is greater than vXLength, or dy is greater than vYLength, the pass of PAV and PBV be from.
Above-mentioned setting is processed type and is comprised: the analysis of spatial data, choose, any one or multiple combination in abbreviation, progressive transmission.
The present invention has also disclosed a kind of spatial data treating apparatus, comprising:
Spatial data and pixel analysis unit, the mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter for each coordinate points according to predefined view control parameter analysis space data;
The spatial data processing unit, for according to above-mentioned analysis result, process spatial data according to disposal route corresponding to processing type of setting.
From above-mentioned technical scheme, can find out, the disclosed spatial data processing method of the embodiment of the present invention, mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data, then according to analysis result, process spatial data according to disposal route corresponding to processing type of setting, spatial relationship in the time of so just can controlling spatial data after processing and show on the determined view window of described view control parameter, as carry out the self-adaptive non-loss abbreviation of spatial data, when soon spatial data shows in described view window, the original coordinates point be presented in same pixel coverage only retains an original coordinates point, cast out other original coordinates point.
(2) the present invention has disclosed a kind of simplifying method of spatial data, comprising:
According to predefined view control gain of parameter abbreviation parameter;
Each coordinate points of the described abbreviation parameter analysis space data of foundation when showing in the determined view window of described view control parameter, and whether described coordinate points is presented in same or several coordinate unit scopes judges whether described coordinate points meets the abbreviation condition;
According to analysis result, the described coordinate points that will meet the abbreviation condition is removed, and is presented at the described original coordinates point in same or several coordinate unit scopes, only retains an original coordinates point, casts out other original coordinates point.
Preferably, according to predefined view control gain of parameter abbreviation parameter, comprise:
Obtain length under the coordinate system of the spatial data of a coordinate unit representative in view window as the abbreviation parameter according to described view control parameter;
1) length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
Wherein ViewWidth is the width of view window, and ViewHeight is the height of view window, and vWidth is the width of the rectangular extent of the spatial data that shows, and vHeight is the height of the rectangular extent of the spatial data that shows;
2) determine described abbreviation parameter vLength according to vXLength and vYLength,
Described definite method is: get minimum value, maximal value or mean value in vXLength and vYLength as the abbreviation parameter, perhaps more described abbreviation parameter is multiplied by a certain default coefficient as final abbreviation parameter, therefore according to controlling the abbreviation accuracy requirement, specifically sets the abbreviation parameter.
Further preferred, the process of spatial data being carried out to abbreviation according to described abbreviation parameter comprises:
1) choose first original coordinates point from the original coordinates point of described spatial data, add it to coordinate points set, and using this coordinate points as reference point;
2) get successively the next original coordinates point of described spatial data as pending coordinate points, calculate the distance between described reference point and pending coordinate points, and judge whether this distance is greater than the value of described abbreviation parameter, if be greater than add described pending coordinate points to the coordinate points set, and using described pending coordinate points as reference point;
3) judge that whether described pending coordinate points is last the original coordinates point in the original coordinates point of described spatial data, if not, returns to execution step 2); If finish the data of the coordinate points in described coordinate points set after as described spatial data abbreviation.
Perhaps preferred, according to predefined view control gain of parameter abbreviation parameter, comprise:
Obtain length under the coordinate system of the spatial data of a coordinate unit representative in view window as the abbreviation parameter according to described view control parameter;
1) length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
2) using vXLength and vYLength as the abbreviation parameter,
Wherein ViewWidth is the width of view window, and ViewHeight is the height of view window, and vWidth is the width of the rectangular extent of the spatial data that shows, and vHeight is the height of the rectangular extent of the spatial data that shows.
Further preferred, the process of spatial data being carried out to abbreviation according to described abbreviation parameter comprises:
1) choose first original coordinates point from the original coordinates point of described spatial data, add it to coordinate points set, and using this coordinate points as reference point;
2) the next original coordinates point of getting successively described spatial data is as pending coordinate points, and the coordinate that deducts the X-axis of pending coordinate points with the coordinate of the X-axis of described reference point takes absolute value, and is assumed to be dx; The coordinate that deducts the Y-axis of pending coordinate points with the coordinate of the Y-axis of described reference point takes absolute value, and is assumed to be dy.Judge whether dx and dy all are less than the value of described abbreviation parameter, and dx is less than vXLength, dy is less than vYLength simultaneously, if not, adds described pending coordinate points to the coordinate points set, and using described pending coordinate points as reference point;
3) judge that whether described pending coordinate points is last the original coordinates point in the original coordinates point of described spatial data, if not, returns to execution step 2); If finish the data of the coordinate points in described coordinate points set after as described spatial data abbreviation.
The present invention has also disclosed a kind of spatial data abbreviation device, comprising:
The abbreviation parameter calculation unit, for according to predefined view control parameter, calculate the abbreviation parameter of the spatial data of current view window;
The spatial data analysis unit, for each coordinate points according to described abbreviation parameter analysis space data, when being shown by the determined view window of described view control parameter, whether described coordinate points is presented in same or several coordinate unit scopes judges whether described coordinate points meets the abbreviation condition;
Spatial data abbreviation unit, for according to analysis result, the described coordinate points that will meet the abbreviation condition is removed, and is presented at the described original coordinates point in same or several coordinate unit scopes, only retains an original coordinates point, casts out other original coordinates point.
From above-mentioned technical scheme, can find out, the disclosed spatial data simplifying method of the embodiment of the present invention is according to described abbreviation parameter, the original coordinates point of analysis space data, when spatial data is shown in described view window, the described original coordinates point be presented in same or several coordinate unit (as one or several pixel) scope only retains an original coordinates point, casts out other original coordinates point.Abbreviation spatial data in this way, the display effect when spatial data after abbreviation shows on described view window can be controlled by the abbreviation parameter, can guarantee that the spatial data after abbreviation realizes harmless the demonstration on described view window, and the correct demonstration of the spatial relationship between the spatial data after the assurance abbreviation, reduce volume of transmitted data simultaneously, improved data transmission efficiency and display efficiency.
(3) the present invention has also disclosed a kind of progressive transmission of spatial data that is applicable to ask transmitting terminal, comprising:
When needs request incremental data, send the incremental data request, comprise the control parameter in described request;
The control parameter that reception comprises according to described request is analyzed the incremental data of rear acquisition to original spatial data.
Preferably, determine whether to need the request incremental data according to following steps:
Judge whether the abbreviation parameter of the spatial data of described formerly buffer memory is greater than the abbreviation parameter of described current view window, if be greater than, needs to ask incremental data, if be not more than, do not need to ask incremental data.
Further preferred, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly, perhaps, described control parameter comprises the abbreviation parameter of current view window and the positional information of coordinate points in the luv space data of the spatial data of buffer memory formerly.
Further preferred again, the incremental data of described reception is inserted in the spatial data of described formerly buffer memory.
Wherein, the process that the described incremental data by described reception is inserted in the spatial data of described formerly buffer memory comprises:
Obtain the positional information of the luv space data coordinates point in described incremental data;
According to described positional information, the point of the original coordinates in described incremental data is inserted into to the correspondence position of the spatial data of described formerly buffer memory.
Perhaps wherein, the process that the described incremental data by described reception is inserted in the spatial data of described formerly buffer memory comprises:
The abbreviation parameter current as described view window using the abbreviation parameter of the spatial data of described formerly buffer memory;
Search the original coordinates point with the spatial data of the described incremental data original coordinates point described formerly buffer memory that on corresponding view window, pixel is identical when described view window shows according to described current abbreviation parameter;
The original coordinates of described incremental data point is inserted into to the back of original coordinates point of the spatial data of the described formerly buffer memory that corresponding view window pixel is identical with it when described view window shows;
The abbreviation parameter that the abbreviation parameter of replacing the spatial data of described formerly buffer memory is described current view window.
Preferably, when the request transmitting terminal is not stored the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window.
Further preferred, the incremental data of the described reception of buffer memory.
The present invention has also disclosed a kind of spatial data progressive transmission device that is applicable to ask transmitting terminal, comprising:
Request transmitting unit, while for determining, needing the request incremental data, send the incremental data request, comprises the control parameter in described request;
The data receiver unit, for receiving the incremental data obtained after to the luv space data analysis according to described control parameter.
The present invention has also disclosed a kind of progressive transmission of spatial data that is applicable to the request receiving end, comprising:
Receive the incremental data request that the request transmitting terminal sends, in described incremental data request, comprise the control parameter;
The control parameter comprised according to described request is carried out analyzing and processing to original spatial data, obtains the needed incremental data of request transmitting terminal;
Send described incremental data to the described request transmitting terminal.
Preferably, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly.
Further preferred, described original spatial data is carried out to analyzing and processing, obtain the needed incremental data process of request transmitting terminal and comprise:
The foundation formerly abbreviation parameter of the spatial data of buffer memory is carried out abbreviation to original spatial data, obtains formerly abbreviation result;
Abbreviation parameter and described formerly abbreviation result according to described current view window are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data.
Perhaps, preferred, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window and the positional information of coordinate points in the luv space data of the spatial data of buffer memory formerly.
Further preferred, described original spatial data is carried out to analyzing and processing, obtain the needed incremental data process of request transmitting terminal and comprise:
According to the positional information of coordinate points in the luv space data of the spatial data of the formerly buffer memory in described control parameter from described luv space data by corresponding original coordinates point taking-up, as abbreviation result formerly;
Abbreviation parameter and described formerly abbreviation result according to described current view window are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data.
Preferably, when the request transmitting terminal is not stored the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window.
Further preferred, described original spatial data is carried out to analyzing and processing, obtain the needed incremental data process of request transmitting terminal and comprise:
Abbreviation parameter according to described current view window is carried out the abbreviation analysis to original spatial data;
Determine that the original coordinates point after abbreviation is incremental data.
The present invention has also disclosed a kind of spatial data progressive transmission device that is applicable to the request receiving end, comprising:
Request reception unit, the incremental data request sent for receiving the request transmitting terminal, comprise the control parameter in described incremental data request;
Analytic unit, according to comprising the control parameter in described request, determine that the luv space data that meet the increment condition are incremental data;
Data transmission unit, for sending described incremental data to the described request transmitting terminal.
From above-mentioned technical scheme, can find out, the disclosed progressive transmission of spatial data of the embodiment of the present invention, the request transmitting terminal is when sending the incremental data request, carry the abbreviation parameter of the view window that current needs are shown in request, make the request receiving end can be according to the abbreviation parameter, analysis obtains the incremental data shown in current view window, transmitted, guaranteed the incremental data that obtains and formerly the spatial data of buffer memory can can't harm demonstration after rebuilding, reduce volume of transmitted data simultaneously, improved data transmission efficiency.
The described spatial data processing method of the present embodiment, the for example analysis of spatial data, choose, abbreviation, progressive transmission, mutual relationship between the pixel that will draw while all showing in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data, then with reference to this mutual relationship, spatial data is processed, thereby making the mutual relationship that can take between the pixel of each coordinate points of spatial data required drafting while being shown in view window to the processing procedure of spatial data is foundation, thereby the situation while making concrete processing procedure can take actual the demonstration is reference, improved efficiency and the accuracy rate in the processing procedure.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The process flow diagram that Fig. 1 is the disclosed a kind of spatial data processing method of the embodiment of the present invention;
Fig. 2 is the disclosed a kind of spatial data treating apparatus of the embodiment of the present invention;
The process flow diagram that Fig. 3 is the disclosed a kind of spatial data simplifying method of the embodiment of the present invention;
The process flow diagram that Fig. 4 is the concrete simplifying method of the disclosed a kind of spatial data of the embodiment of the present invention;
The process flow diagram that Fig. 5 is the concrete simplifying method of the disclosed the second spatial data of the embodiment of the present invention;
Fig. 6 is the disclosed a kind of process flow diagram that is applicable to ask the progressive transmission of spatial data of transmitting terminal of the embodiment of the present invention;
Fig. 7 be the embodiment of the present invention disclosed another be applicable to ask the process flow diagram of the progressive transmission of spatial data of transmitting terminal;
Fig. 8 is that the disclosed a kind of incremental data by described reception of the embodiment of the present invention is inserted into the process flow diagram in the spatial data of described formerly buffer memory;
Fig. 9 be the embodiment of the present invention disclosed another the incremental data of described reception is inserted into to the process flow diagram in the spatial data of described formerly buffer memory;
Figure 10 is the disclosed a kind of process flow diagram that is applicable to the progressive transmission of spatial data of request receiving end of the embodiment of the present invention;
Figure 11 be the embodiment of the present invention disclosed another be applicable to the process flow diagram of the progressive transmission of spatial data of request receiving end;
Figure 12 be the embodiment of the present invention disclosed another according to described control parameter carrying out the abbreviation analysis and determining the process flow diagram that the luv space data meet the increment condition are incremental data the luv space data;
Figure 13 is the disclosed a kind of spatial data abbreviation device of the embodiment of the present invention;
Figure 14 is the disclosed a kind of spatial data progressive transmission device of the embodiment of the present invention;
Figure 15 is disclosed another the spatial data progressive transmission device of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
For convenience of description, in present specification, will need spatial data to be processed to be referred to as the luv space data, the coordinate of need spatial data to be processed is referred to as the original coordinates of luv space data, need the coordinate points of spatial data to be processed to be referred to as the original coordinates point of luv space data, or directly be referred to as the original coordinates point.
The invention discloses a kind of spatial data processes, the method of abbreviation and progressive transmission, when spatial data shows on view window, to realize by the rasterizing on electronic curtain (view window), the angle shown from spatial data, between spatial data and the mutual relationship between the coordinate points of spatial data, that pixel by drawing on view window shows, therefore the mutual relationship between the pixel that will draw in the time of can showing in the determined view window of described view control parameter by each coordinate points according in predefined view control parameter analysis space data, comprise coincidence, offset, adjacent and from four kinds of relations, then according to above-mentioned analysis result, process spatial data according to disposal route corresponding to processing type of setting, abbreviation such as spatial data, its corresponding actual scene is: because the resolution of view window is limited, when high-resolution spatial data shows on view window, the data (coordinate points) that have expressive space data detail section can be plotted on identical pixel, overlap, just can guarantee that the harmless of spatial data shown as long as at this moment get the coordinate points be plotted on this pixel, other is plotted in the coordinate points that meets the abbreviation condition on this pixel and can removes, therefore, according to above-mentioned thought, at first according to the view control parameter, length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit (as a pixel unit) representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, determine the abbreviation parameter according to vXLength and vYLength, then according to described abbreviation parameter, the original coordinates point of analysis space data, when spatial data is shown in described view window, the described original coordinates point be presented in same or several coordinate unit (as one or several pixel) scope only retains an original coordinates point, cast out other original coordinates point, the abbreviation of realization to spatial data.Spatial data after abbreviation is shown or transmitted, not only can guarantee the harmless demonstration of spatial data, accomplish the self-adaptation abbreviation, and can guarantee the correctness that between spatial data, spatial relationship shows, because on display effect, be the same with the effect shown after abbreviation before abbreviation, further, improved the transfer efficiency of spatial data and the purpose of display efficiency.When map amplifies, spatial data is shown to the number of pixels of filling on screen many (figure that spatial data shows is larger), need more coordinate points to carry out the detail section of expressive space data, as long as these coordinate points (incremental data) are got and are inserted in corresponding existing spatial data from the luv space data and go, still can guarantee the harmless demonstration of spatial data.The present invention is suitable for abbreviation and the progressive transmission of vector data, the abbreviation and the progressive transmission that also are suitable for raster data, owing in existing vector data processing procedure, having more problem, so take vector data in the embodiment of the present invention, as main, be described, its specific implementation is as described below:
The method flow that the disclosed a kind of spatial data of the embodiment of the present invention is processed as shown in Figure 1, comprising:
Mutual relationship between the pixel that will draw when each coordinate points in first step, the predefined view control parameter analysis space data of foundation shows in the determined view window of described view control parameter;
View control parameter in the present embodiment comprises: the outsourcing rectangle parameter of view window, the outsourcing rectangle parameter of view window is the view window scope (0 of display space entity, 0, ViewWidth, ViewHeight), scope as the computer screen map display window, comprise: the height ViewHeight of the width ViewWidth of the outsourcing rectangle of view window and the outsourcing rectangle of view window, by these two parameters, can determine in the actual view window magnitude range for the window of display graphics, image.
When the view mode of actual view window is two-dimensional model, described view control parameter also comprises: the rectangular extent of the spatial data shown in described view window, the rectangular extent of the geographic coordinate of the electronic chart namely shown in view window.
When the view mode of actual view window is three dimensional pattern, in its view control parameter except the outsourcing rectangle parameter that comprises view window, also comprise viewpoint parameter and projective parameter, described viewpoint parameter comprises the position O (x of viewpoint in predefined world coordinate system o, y o, z o), x o, y o, z oMean the observed target location A (x of three components, the viewpoint of viewpoint in world coordinate system a, y a, z a) and the vectorial up (x that makes progress of virtual camera Up, y Up, z Up); Described projective parameter comprises: rectangular projection and perspective projection.
Mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data, described mutual relationship comprises coincidence, offsets, adjacent and from four kinds of relations.This process comprises respectively S11a, two steps of S11b:
Step S11a, according to described view control parameter, obtain the length under the coordinate system of the spatial data of a coordinate unit representative in view window:
Length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
Wherein ViewWidth is the width of view window, and ViewHeight is the height of view window, and vWidth is the width of the rectangular extent of the spatial data that shows, and vHeight is the height of the rectangular extent of the spatial data that shows.
VXLength is illustrated in the length under the original coordinate system of the spatial data of a coordinate unit representative of X-direction in view window, and vYLength is illustrated in the length under the original coordinate system of the spatial data of a coordinate unit representative of Y direction in view window; The perhaps length under the original coordinate system of the spatial data of a coordinate unit representative in view window using the minimum value in vXLength and vYLength, maximal value or mean value.
Step S11b, according to the length under the coordinate system of the spatial data of a coordinate unit representative in described view window, the mutual relationship between the pixel that will draw while coming each coordinate points in the analysis space data to show in the determined view window of described view control parameter:
Mutual relationship between the pixel that will draw when each coordinate points in spatial data shows in the determined view window of described view control parameter comprises: overlap, adjacent, offset, from
2 coordinate points PA of hypothesis space data and PB, the pixel that PA and PB will draw while showing in the determined view window of described view control parameter is PAV and PBV;
The coordinate that deducts the X-axis of PB with the coordinate of the X-axis of described PA takes absolute value, and is assumed to be dx; The coordinate that deducts the Y-axis of PB with the coordinate of the Y-axis of described PA takes absolute value, and is assumed to be dy.
If dx is less than vXLength, dy is less than vYLength simultaneously, and the relation of PAV and PBV is for overlapping;
If dx equals vXLength, dy is less than vYLength simultaneously, and the pass of PAV and PBV is adjacent;
If dy equals vYLength, dx is less than vXLength simultaneously, and the pass of PAV and PBV is adjacent;
If dx equals vXLength, dy equals vYLength simultaneously, and the pass of PAV and PBV is to offset;
If dx is greater than vXLength, or dy is greater than vYLength, the pass of PAV and PBV be from.
Step S12, according to the relationship analysis result of above-mentioned S11b, process spatial data according to disposal route corresponding to processing type of setting.Described setting is processed type and is comprised: the analysis of spatial data, choose, any one or multiple combination in abbreviation, progressive transmission.
Such as, the processing type of setting is the spatial data abbreviation, disposal route when showing spatial data in described view window, be presented at the original coordinates point of same the above spatial data of pixel, be that mutual relationship between pixel is for overlapping, only retain an original coordinates point, cast out other original coordinates point.
From above-mentioned technical scheme, can find out, mutual relationship between the pixel that will draw when the disclosed spatial data processing method of the embodiment of the present invention shows in the determined view window of described view control parameter according to each coordinate points in predefined view control parameter analysis space data, then according to analysis result, process spatial data according to disposal route corresponding to processing type of setting, spatial relationship in the time of so just can controlling spatial data after processing and show on the determined view window of described view control parameter, as carry out the self-adaptive non-loss abbreviation of spatial data, when soon spatial data shows in described view window, the original coordinates point be presented in same pixel coverage only retains an original coordinates point, cast out other original coordinates point.
The spatial data treating apparatus that the present invention discloses as shown in Figure 2, comprising:
Spatial data and pixel analysis unit, the mutual relationship between the pixel that will draw while showing in the determined view window of described view control parameter for each coordinate points according to predefined view control parameter analysis space data;
The spatial data processing unit, for according to above-mentioned analysis result, process spatial data according to disposal route corresponding to processing type of setting.
The implementation of the disclosed spatial data treating apparatus of the present embodiment is corresponding to the disclosed embodiment of the method flow process of the invention described above embodiment, and for preferably installing embodiment, its concrete implementation can, referring to said method embodiment, not repeat them here.
The method flow of the disclosed a kind of spatial data abbreviation of the embodiment of the present invention as shown in Figure 3, comprising:
Step S31, the predefined view control parameter of foundation obtain the abbreviation parameter;
Each coordinate points of step S32, the described abbreviation parameter analysis space data of foundation when showing in the determined view window of described view control parameter, and whether described coordinate points is presented in same or several coordinate unit scopes judges whether described coordinate points meets the abbreviation condition;
According to described abbreviation parameter, the original coordinates point of analysis space data, when spatial data is shown in described view window, whether described original coordinates point is presented in same or several coordinate unit (as one or several pixel) scope judges whether described original coordinates point meets the abbreviation condition.
Step S33, according to analysis result, the described coordinate points that will meet the abbreviation condition is removed.
The described original coordinates point that will meet the abbreviation condition, be presented in same or several coordinate unit (as same pixel or several pixel) scope as described in the original coordinates point, only retain an original coordinates point, cast out other original coordinates point.
Wherein, the different abbreviation parameter that step S31 draws can draw different abbreviation conditions, specifically as shown in Figure 4, Figure 5.
Above-mentioned view control parameter comprises: the width of view window and the height of view window, the rectangular extent of the spatial data shown in view window.The width ViewWidth of view window and the height ViewHeight of view window have determined the view window scope (0 of display space data, 0, ViewWidth, ViewHeight), scope as the computer screen map display window, by these two parameters, can determine in the actual view window magnitude range of the window for showing image.
The rectangular extent of the spatial data shown in view window refers to the spatial data in this scope is presented in view window, the outsourcing rectangle of the spatial data that namely can show in view window, its concrete value range is set according to actual demonstration situation, the width of the rectangular extent of described spatial data is vWidth, is highly vHeight.
Fig. 4 has disclosed the first concrete abbreviation embodiment, obtain the length under the original coordinate system of the spatial data of a coordinate unit (as a pixel) representative in view window according to described view control parameter, determine described abbreviation parameter according to described length, by the abbreviation parameter, control the abbreviation precision.
1) length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit (as a pixel unit) representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
2) determine described abbreviation parameter vLength according to vXLength and vYLength.
Described definite method is: get minimum value, maximal value or mean value in vXLength and vYLength as the abbreviation parameter, perhaps more above-mentioned abbreviation parameter is multiplied by certain default coefficient as the abbreviation parameter, should can set according to actual conditions by default coefficient,, therefore according to controlling the abbreviation accuracy requirement, specifically set the abbreviation parameter.
Concrete steps are:
Step S41, the predefined view control parameter of foundation obtain the abbreviation parameter;
Step S42, choose first original coordinates point from the original coordinates point of described spatial data, add it to coordinate points set, and using this coordinate points as reference point;
Step S43, get successively the next original coordinates point of described spatial data as pending coordinate points, calculate the distance between described reference point and pending coordinate points, and judge whether this distance is greater than the value of described abbreviation parameter, if be greater than add described pending coordinate points to the coordinate points set, and using described pending coordinate points as reference point;
Step S44, judge that whether described pending coordinate points is last the original coordinates point in the original coordinates point of described spatial data, if not, returns to execution step S43; If finish the data of the coordinate points in described coordinate points set after as described spatial data abbreviation.
Fig. 5 has disclosed the second concrete abbreviation embodiment, according to described view control parameter, obtains length under the coordinate system of the spatial data of a coordinate unit representative in view window as the abbreviation parameter;
1) length vXLength and vYLength under the original coordinate system of the spatial data of a coordinate unit representative in view window calculated according to view coordinate system X-axis and coordinate system Y-axis, its computing formula is:
vXLength=vWidth/ViewWidth
vYLength=vHeight/ViewHeight
2) using vXLength and vYLength as the abbreviation parameter.
Wherein ViewWidth is the width of view window, and ViewHeight is the height of view window, and vWidth is the width of the rectangular extent of the spatial data that shows, and vHeight is the height of the rectangular extent of the spatial data that shows.
Concrete steps are:
Step S51, the predefined view control parameter of foundation obtain the abbreviation parameter;
Step S52, choose first original coordinates point from the original coordinates point of described spatial data, add it to coordinate points set, and using this coordinate points as reference point;
Step S53, get successively described spatial data next original coordinates point as pending coordinate points, the coordinate that deducts the X-axis of pending coordinate points with the coordinate of the X-axis of described reference point takes absolute value, and is assumed to be dx; The coordinate that deducts the Y-axis of pending coordinate points with the coordinate of the Y-axis of described reference point takes absolute value, and is assumed to be dy.Judge whether dx and dy all are less than the value of described abbreviation parameter, and dx is less than vXLength, dy is less than vYLength simultaneously, if not, adds described pending coordinate points to the coordinate points set, and using described pending coordinate points as reference point;
Step S54, judge that whether described pending coordinate points is last the original coordinates point in the original coordinates point of described spatial data, if not, returns to execution step S53; If finish the data of the coordinate points in described coordinate points set after as described spatial data abbreviation.
The flow process of progressive transmission of spatial data disclosed by the invention as shown in Figure 6, comprising:
Step S61, when needs request incremental data, send the incremental data request, comprise the control parameter in described request;
Progressive transmission of spatial data in the present embodiment is applicable to ask transmitting terminal, when the request transmitting terminal is judged needs request incremental data, send the incremental data request to the request receiving end, comprise the abbreviation parameter of the current view window of asking transmitting terminal in request.
There are two kinds of situations in this step, if the request transmitting terminal is cached with spatial data, control parameter and comprise the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly, make the request receiving end to carry out the abbreviation analysis to spatial data according to described control parameter, obtain incremental data.Perhaps, when the described request transmitting terminal is cached with spatial data, controls parameter and comprise: the abbreviation parameter of current view window and the positional information of coordinate points in the luv space data of the spatial data of buffer memory formerly.
If the request transmitting terminal does not have the spatial cache data, control parameter now comprises the abbreviation parameter of current view window.
The control parameter that step S62, reception comprise according to described request is analyzed the incremental data of rear acquisition to original spatial data
In the disclosed progressive transmission of spatial data of the present embodiment, the request transmitting terminal is when sending the incremental data request, the abbreviation parameter that the control parameter of carrying in request contains the spatial data in the view window that current needs are shown, its computing method are referring to step S31, make the request receiving end can be according to controlling parameter, analysis obtains being suitable for the incremental data of current view window, spatial data after having guaranteed to rebuild can be shown according to the display effect of controlling by the abbreviation parameter in advance, can realize harmless the demonstration, reduced volume of transmitted data simultaneously, improved data transmission efficiency.
Another progressive transmission of spatial data disclosed by the invention, the method is applicable to ask transmitting terminal, based on the request transmitting terminal, is cached with the formerly situation of the spatial data of buffer memory, comprising:
Step S71, obtain the formerly abbreviation parameter of the spatial data of buffer memory;
Step S72, judge whether the abbreviation parameter of the spatial data of described formerly buffer memory is greater than the abbreviation parameter of described current view window, if, perform step S73, if not, finish;
Step S73, the request of transmission incremental data, comprise the control parameter in described request;
Control parameter now comprises: the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly.
Step S74, reception carry out by the luv space data incremental data that the abbreviation analysis obtains afterwards according to described control parameter;
Step S75, the incremental data of described reception is inserted in the spatial data of described formerly buffer memory.
Owing to now asking transmitting terminal to be cached with the formerly spatial data of buffer memory, so the incremental data of reception need to be inserted in the spatial data of buffer memory formerly, go, realize data reconstruction, the data after reconstruction are as the corresponding spatial data shown of current view window.
The process that incremental data by described reception disclosed by the invention is inserted in the spatial data of described formerly buffer memory comprises:
Step S81, using the abbreviation parameter of the spatial data of described formerly buffer memory the abbreviation parameter current as described view window;
Step S82, according to described current abbreviation parameter, search the original coordinates point with the spatial data of the described incremental data original coordinates point described formerly buffer memory that on corresponding view window, pixel is identical when described view window shows;
Step S83, the original coordinates of described incremental data point is inserted into to the back of original coordinates point of the spatial data of the described formerly buffer memory that corresponding view window pixel is identical with it when described view window shows;
Step S84, replace the abbreviation parameter that the abbreviation parameter of the spatial data of described formerly buffer memory is described current view window.
The process that the another incremental data by described reception disclosed by the invention is inserted in the spatial data of described formerly buffer memory comprises:
Step S91, obtain the positional information of the luv space data coordinates point in described incremental data;
Step S92, according to described positional information, the point of the original coordinates in described incremental data is inserted into to the correspondence position of the spatial data of described formerly buffer memory;
Step S93, replace the abbreviation parameter that the abbreviation parameter of the spatial data of described formerly buffer memory is described current view window.
The process that the present embodiment is open to be inserted into the incremental data of described reception in the spatial data of described formerly buffer memory comprises that being suitable for the request receiving end has sent to the positional information of the original coordinates point in described incremental data the situation of asking transmitting terminal.
In the present embodiment, described when the request transmitting terminal is cached with the spatial data of buffer memory formerly, the request transmitting terminal is when judging needs request incremental data, send the incremental data request, the abbreviation parameter of the spatial data of the current view window that the active client of usining in request of data need to be shown is as the abbreviation parameter of controlling the current view window in parameter, make the incremental data of its request to be adjusted according to the abbreviation parameter of active client, the incremental data of reception is inserted in the spatial data of buffer memory formerly, carry out data reconstruction, the data demonstration data corresponding as current view window after rebuilding, to have guaranteed that the spatial data after the reconstruction can be shown according to the display effect of being controlled by the abbreviation parameter in advance, can realize harmless the demonstration.The method simple and flexible, be easy to realize, and calculated amount is little, and efficiency is high.
The flow process of another progressive transmission of spatial data disclosed by the invention as shown in figure 10, comprising:
The incremental data request that step S101, reception request transmitting terminal send, comprise the control parameter in described request;
The disclosed progressive transmission of spatial data of the present embodiment is applicable to the request receiving end.The type of the control parameter in the data increment request of its reception is corresponding with the type in embodiment illustrated in fig. 6.When the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly.
Step S102, the control parameter comprised according to described request are carried out analyzing and processing to original spatial data, determine that the luv space data that meet the increment condition are incremental data;
Step S103, send described incremental data to the described request transmitting terminal.
In the disclosed progressive transmission of spatial data of the present embodiment, the request receiving end carries out the abbreviation analysis according to controlling parameter to the luv space data, and the described method that the luv space data are carried out to the abbreviation analysis please refer to aforesaid spatial data simplifying method (step S31 is to step S54) and also will meet the luv space data of incremental data condition as incremental data.In the method, analytic process to spatial data is carried out according to the control parameter in the incremental data request, the actual displayed view window of asking transmitting terminal of take is basis, to guarantee that the incremental data obtained sends to the request transmitting terminal, the spatial data that the request transmitting terminal receives after described incremental data reconstruction can be shown according to the display effect of controlling by the abbreviation parameter in advance, can realize harmless the demonstration, only incremental data is transmitted simultaneously, greatly reduce volume of transmitted data, improved data transmission efficiency.
Another progressive transmission of spatial data disclosed by the invention, the method is applicable to the request receiving end, based on the request transmitting terminal, is cached with the formerly situation of the spatial data of buffer memory, comprising:
The incremental data request that step S111, reception request transmitting terminal send, comprise the control parameter in described request;
Described control parameter comprises: the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly.
The abbreviation parameter of the spatial data of step S112, the first buffer memory of foundation is carried out abbreviation to original spatial data, obtains formerly abbreviation result;
Abbreviation parameter and the described formerly abbreviation result of step S113, the described current view window of foundation are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data;
Step S114, described incremental data is sent to the request transmitting terminal.
The described method that the luv space data are carried out to abbreviation please refer to aforesaid spatial data simplifying method (step S31 is to step S54).
In addition, when the request transmitting terminal does not have the spatial cache data, do not have the formerly abbreviation parameter of the spatial data of buffer memory, described control parameter comprises: the abbreviation parameter of current view window.The request receiving end, after receiving the incremental data request, carries out abbreviation according to the abbreviation parameter of described current view window by the luv space data of request, and the data that obtain are incremental data, and this incremental data is sent to the request transmitting terminal.After the request transmitting terminal receives incremental data, the data that incremental data need to be shown as current view window, shown, and using this incremental data as spatial cache data formerly, abbreviation parameter using the abbreviation parameter of described current view window as the spatial data of described formerly buffer memory, process so that carry out follow-up progressive transmission.
Further, controlling parameter in the request that the described request transmitting terminal sends comprises: the abbreviation parameter of current view window and formerly during positional information in the luv space data of the coordinate points of the spatial data of buffer memory, according to described control parameter to the luv space data carry out the abbreviation analysis, and determine that the process that the luv space data that meet the increment condition are incremental data comprises:
Step S121, according to the positional information of coordinate points in the luv space data of the spatial data of the formerly buffer memory in described control parameter from described luv space data by corresponding original coordinates point taking-up, as abbreviation result formerly;
Abbreviation parameter and the described formerly abbreviation result of step S122, the described current view window of foundation are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data.
The present invention discloses a kind of spatial data abbreviation device, as shown in figure 13, comprising: abbreviation parameter calculation unit, spatial data analysis unit, spatial data abbreviation unit.
Wherein:
The abbreviation parameter calculation unit, for according to predefined view control parameter, calculate the abbreviation parameter of the spatial data of current view window;
The spatial data analysis unit, for each coordinate points according to described abbreviation parameter analysis space data, when being shown by the determined view window of described view control parameter, whether described coordinate points is presented in same or several coordinate unit scopes judges whether described coordinate points meets the abbreviation condition;
Spatial data abbreviation unit, for according to analysis result, the described coordinate points that will meet the abbreviation condition is removed, and is presented at the described original coordinates point in same or several coordinate unit scopes, only retains an original coordinates point, casts out other original coordinates point.
The implementation of the disclosed spatial data abbreviation of the present embodiment device is corresponding to the disclosed embodiment of the method flow process of the invention described above embodiment, and for preferably installing embodiment, its concrete implementation can, referring to said method embodiment, not repeat them here.
The present invention discloses a kind of spatial data progressive transmission device, as shown in figure 14, comprising: request transmitting unit, while for determining, needing the request incremental data, send the incremental data request, comprise the control parameter in described request; The data receiver unit, carry out by the luv space data incremental data that the abbreviation analysis obtains afterwards for receiving according to described control parameter.
The implementation of the disclosed spatial data progressive transmission of the present embodiment device is corresponding to the disclosed embodiment of the method flow process of the invention described above embodiment, and for preferably installing embodiment, its concrete implementation can, referring to said method embodiment, not repeat them here.
The disclosed spatial data progressive transmission of the present embodiment device is arranged at client, or is connected with client, according to the present case of client, sends the incremental data request, and the incremental data received.
Another spatial data progressive transmission device disclosed by the invention, as shown in figure 15, comprising: request reception unit, analytic unit, data transmission unit.
Wherein: request reception unit, the incremental data request sent for receiving the request transmitting terminal, comprise the control parameter in described incremental data request;
Analytic unit, for analyzing described luv space data, determine that the luv space data that meet the increment condition are incremental data;
Data transmission unit, for sending described incremental data to the request transmitting terminal.
The implementation of the disclosed spatial data progressive transmission of the present embodiment device is corresponding to the disclosed embodiment of the method flow process of the invention described above embodiment, and for preferably installing embodiment, its concrete implementation can, referring to said method embodiment, not repeat them here.
The disclosed spatial data progressive transmission of the present embodiment device is arranged at server end, or is connected with server end, after receiving the incremental data request, according to the control gain of parameter incremental data in the incremental data request, and sends it to the request transmitting terminal.
Data processing equipment disclosed by the invention can be arranged in computing machine, also can be arranged on mobile phone or other can use in equipment of the present invention, or other smart machines.It both can be arranged on the request receiving end, before the data that will ask the transmitting terminal request send, at first spatial data is processed, also it can be arranged on to the request transmitting terminal, before sending it to actual view window, data are processed, or be arranged on server and request transmitting terminal simultaneously, select jointly to be processed by which side or both sides according to actual conditions.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates and gets final product referring to method.
The professional can also further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (17)

1. a progressive transmission of spatial data, is characterized in that, comprising:
When needs request incremental data, send the incremental data request, comprise the control parameter in described request;
The control parameter that reception comprises according to described request is analyzed the incremental data of rear acquisition to original spatial data.
2. method according to claim 1, is characterized in that, according to following steps, determines whether to need the request incremental data:
Judge whether the abbreviation parameter of the spatial data of described formerly buffer memory is greater than the abbreviation parameter of described current view window, if be greater than, needs to ask incremental data, if be not more than, do not need to ask incremental data.
3. any method according to claim 1 and 2, it is characterized in that, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly, perhaps, described control parameter comprises the abbreviation parameter of current view window and the positional information of coordinate points in the luv space data of the spatial data of buffer memory formerly.
4. method according to claim 3, is characterized in that, also comprises: the incremental data of described reception is inserted in the spatial data of described formerly buffer memory.
5. method according to claim 4, is characterized in that, the process that the described incremental data by described reception is inserted in the spatial data of described formerly buffer memory comprises:
Obtain the positional information of the luv space data coordinates point in described incremental data;
According to described positional information, the point of the original coordinates in described incremental data is inserted into to the correspondence position of the spatial data of described formerly buffer memory.
6. method according to claim 4, is characterized in that, the process that the described incremental data by described reception is inserted in the spatial data of described formerly buffer memory comprises:
The abbreviation parameter current as described view window using the abbreviation parameter of the spatial data of described formerly buffer memory;
Search the original coordinates point with the spatial data of the described incremental data original coordinates point described formerly buffer memory that on corresponding view window, pixel is identical when described view window shows according to described current abbreviation parameter;
The original coordinates of described incremental data point is inserted into to the back of original coordinates point of the spatial data of the described formerly buffer memory that corresponding view window pixel is identical with it when described view window shows;
The abbreviation parameter that the abbreviation parameter of replacing the spatial data of described formerly buffer memory is described current view window.
7. any method according to claim 1 and 2, is characterized in that, when the request transmitting terminal is not stored the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window.
8. method according to claim 7, is characterized in that, also comprises: the incremental data of the described reception of buffer memory.
9. a spatial data progressive transmission device, is characterized in that, comprising:
Request transmitting unit, while for determining, needing the request incremental data, send the incremental data request, comprises the control parameter in described request;
The data receiver unit, for receiving the incremental data obtained after to the luv space data analysis according to described control parameter.
10. a progressive transmission of spatial data, is characterized in that, comprising:
Receive the incremental data request that the request transmitting terminal sends, in described incremental data request, comprise the control parameter;
The control parameter comprised according to described request is carried out analyzing and processing to original spatial data, obtains the needed incremental data of request transmitting terminal;
Send described incremental data to the described request transmitting terminal.
11. method according to claim 10, is characterized in that, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window and the abbreviation parameter of the spatial data of buffer memory formerly.
12. method according to claim 11, is characterized in that, described original spatial data carried out to analyzing and processing, obtains the needed incremental data process of request transmitting terminal and comprise:
The foundation formerly abbreviation parameter of the spatial data of buffer memory is carried out abbreviation to original spatial data, obtains formerly abbreviation result;
Abbreviation parameter and described formerly abbreviation result according to described current view window are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data.
13. method according to claim 10, it is characterized in that, when the request Sender side Storage has the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window and the positional information of coordinate points in the luv space data of the spatial data of buffer memory formerly.
14. method according to claim 13, is characterized in that, described original spatial data carried out to analyzing and processing, obtains the needed incremental data process of request transmitting terminal and comprise:
According to the positional information of coordinate points in the luv space data of the spatial data of the formerly buffer memory in described control parameter from described luv space data by corresponding original coordinates point taking-up, as abbreviation result formerly;
Abbreviation parameter and described formerly abbreviation result according to described current view window are carried out the abbreviation analysis to original spatial data, obtain incremental data, determine in described current abbreviation result, and the original coordinates point in described formerly abbreviation result is not incremental data.
15. method according to claim 10, is characterized in that, when the request transmitting terminal is not stored the spatial data of buffer memory formerly, described control parameter comprises: the abbreviation parameter of current view window.
16. method according to claim 15, is characterized in that, described original spatial data carried out to analyzing and processing, obtains the needed incremental data process of request transmitting terminal and comprise:
Abbreviation parameter according to described current view window is carried out the abbreviation analysis to original spatial data;
Determine that the original coordinates point after abbreviation is incremental data.
17. a spatial data progressive transmission device, is characterized in that, comprising:
Request reception unit, the incremental data request sent for receiving the request transmitting terminal, comprise the control parameter in described incremental data request;
Analytic unit, according to the control parameter comprised in described request, determine that the luv space data that meet the increment condition are incremental data;
Data transmission unit, for sending described incremental data to the described request transmitting terminal.
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