CN103793494A - Processing method and system for spatial data - Google Patents
Processing method and system for spatial data Download PDFInfo
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- CN103793494A CN103793494A CN201410030812.0A CN201410030812A CN103793494A CN 103793494 A CN103793494 A CN 103793494A CN 201410030812 A CN201410030812 A CN 201410030812A CN 103793494 A CN103793494 A CN 103793494A
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- tile
- coordinate
- vegetarian refreshments
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- point coordinate
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Abstract
The invention provides a processing method for spatial data. The processing method comprises the steps that a spatial data request, with coordinates of a tile map, sent by a client terminal is received; center coordinates of the tile map are obtained according to the coordinates of the tile map and the size of a preset tile map; according to the center coordinates and coordinates of an element point of the tile map, the coded value of the element point is obtained; the coded value is sent to the client terminal. The invention further provides a processing system for the spatial data. According to the technical scheme, the transmission data size between a server and the client terminal can be reduced, and transmission cost can be lowered.
Description
[technical field]
The present invention relates to internet, applications field, relate in particular to a kind of disposal route and system of spatial data.
[background technology]
At present, generate in the process of electronic chart, client need to, to server request spatial data, then generate electronic chart according to the spatial data obtaining from server, and be shown to user; Server, receiving after the request that client sends, sends to client by corresponding spatial data; Wherein, the spatial data that server sends is the key element point coordinate based on world coordinate system, world coordinate system refers to and converts the spherical co-ordinate of the earth to obtain after planimetric coordinates coordinate system, and therefore server sends to the spatial data of client, is exactly the original coordinates of wanting vegetarian refreshments.
But, server sends in the spatial data of client, there are segment space data, even all spatial data belongs to the vegetarian refreshments of wanting in same tile figure, and it is identical between the coordinate of wanting vegetarian refreshments in same tile figure, to have some high position datas, for example, want vegetarian refreshments p0 (x0, y0)=(12940445.74, 4818304.33) and want vegetarian refreshments p0 (x1, y1)=(12940441.16, 4818283.87) belong in same tile figure, in the coordinate that these two are wanted vegetarian refreshments, in horizontal ordinate, high position data 1294044 is identical, in ordinate y, high position data 4818 is identical.The original coordinates of wanting vegetarian refreshments because server sends to the spatial data of client, can there is the coordinate that a large amount of high position datas is identical, in the spatial data that makes to transmit, there is a large amount of redundant datas, and the coordinate of wanting vegetarian refreshments larger with initial point distance, the redundant data amount producing is larger, thereby cause between server and client institute's transmitted data amount larger, transmission cost is higher.
[summary of the invention]
The invention provides a kind of disposal route and system of spatial data, reduce transmitted data amount and transmission cost between server and client to realize.
Concrete technical scheme of the present invention is as follows:
According to one preferred embodiment of the present invention, a kind of disposal route of spatial data, comprising:
Receive the spatial data request of the coordinate that carries tile figure of client transmission;
According to the size of the coordinate of described tile figure and default tile figure, obtain the center point coordinate of described tile figure;
According to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, described in obtaining, want the encoded radio of vegetarian refreshments;
Described encoded radio is sent to described client.
In said method, the size of the coordinate of the described tile figure of described foundation and default tile figure, obtains the center point coordinate of described tile figure, comprising:
According to the coordinate (x, y) of described tile figure and the size (m, n) of described tile figure, utilize following formula to obtain the center point coordinate of described tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
Wherein, c (x, y) is the center point coordinate of described tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
In said method, the coordinate of wanting vegetarian refreshments of the described center point coordinate of described foundation and described tile figure, wants the encoded radio of vegetarian refreshments described in obtaining, and comprising:
According to the difference of described coordinate and the described center point coordinate of wanting vegetarian refreshments, described in obtaining, want the encoded radio of vegetarian refreshments.
A disposal route for spatial data, comprising:
The encoded radio of wanting vegetarian refreshments that reception server sends according to spatial data request;
According to coordinate and the size of default tile figure, obtain the center point coordinate of described tile figure;
According to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, described in obtaining, want the coordinate of vegetarian refreshments.
In said method, the described center point coordinate of described foundation and the described encoded radio of wanting vegetarian refreshments, want the coordinate of vegetarian refreshments described in obtaining, and comprising:
According to the described encoded radio of wanting vegetarian refreshments and described center point coordinate and be worth, want the coordinate of vegetarian refreshments described in acquisition.
A disposal system for spatial data, comprising:
Receiving element, the spatial data request of the coordinate that carries tile figure sending for receiving client;
The first processing unit, for the size according to the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure;
The second processing unit, for the coordinate of wanting vegetarian refreshments according to described center point coordinate and described tile figure, wants the encoded radio of vegetarian refreshments described in obtaining;
Transmitting element, for sending to described client by described encoded radio.
In said system, described the first processing unit, according to the size of the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure, comprising:
According to the coordinate (x, y) of described tile figure and the size (m, n) of described tile figure, utilize following formula to obtain the center point coordinate of described tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
Wherein, c (x, y) is the center point coordinate of described tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
In said system, described the second processing unit, according to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, is wanted the encoded radio of vegetarian refreshments described in obtaining, comprising:
According to the difference of described coordinate and the described center point coordinate of wanting vegetarian refreshments, described in obtaining, want the encoded radio of vegetarian refreshments.
A disposal system for spatial data, comprising:
Receiving element, the encoded radio of wanting vegetarian refreshments sending according to spatial data request for reception server;
The first processing unit, for coordinate and the size of the tile figure according to default, obtains the center point coordinate of described tile figure;
The second processing unit, for according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, wants the coordinate of vegetarian refreshments described in obtaining.
In said system, described the second processing unit, according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, is wanted the coordinate of vegetarian refreshments described in obtaining, comprising:
According to the described encoded radio of wanting vegetarian refreshments and described center point coordinate and be worth, want the coordinate of vegetarian refreshments described in acquisition.
As can be seen from the above technical solutions, the present invention has following beneficial effect:
According to coordinate and the size of tile figure, obtain the center point coordinate of tile figure, all coordinates of wanting vegetarian refreshments in tile figure are all converted to the encoded radio of this center point coordinate relatively, thereby reduce the high position data of the redundancy in key element point coordinate in tile figure, reduce transmitted data amount between server and client, reduce the transmission cost of data.
[accompanying drawing explanation]
Fig. 1 is the schematic flow sheet of the preferred embodiment one of the disposal route of implementation space of the present invention data;
Fig. 2 is the schematic flow sheet of the preferred embodiment two of the disposal route of implementation space of the present invention data;
Fig. 3 is the structural representation of the preferred embodiment one of the disposal system of implementation space of the present invention data;
Fig. 4 is the structural representation of the preferred embodiment two of the disposal system of implementation space of the present invention data.
[embodiment]
Basic thought of the present invention is: receive the spatial data request of the coordinate that carries tile figure of client transmission; According to the size of the coordinate of described tile figure and default tile figure, obtain the center point coordinate of described tile figure; According to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, described in obtaining, want the encoded radio of vegetarian refreshments; Described encoded radio is sent to described client.
In order to make the object, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The invention provides a kind of disposal route of spatial data, Fig. 1 is the schematic flow sheet of the preferred embodiment one of the disposal route of implementation space of the present invention data, and as shown in Figure 1, the method comprises the following steps:
Step S101, receives the spatial data request of the coordinate that carries tile figure that client sends, and according to the size of the coordinate of tile figure and default tile figure, obtains the center point coordinate of tile figure.
Concrete, server is according to default map scale, from the upper left corner of full dose electronic chart, cut apart according to order from left to right, from top to bottom, full dose electronic chart is divided into the foursquare tile figure of formed objects (as 256 pixel × 256 pixels), these tiles figure, in the time receiving client-requested, is transferred to client by the tile figure of respective regions, by client, the tile figure receiving is assembled into a width electronic chart, and this electronic chart is shown to user; Can be in advance by the coordinate of tile figure and size configure server and client side.
Wherein, each tile figure has a mark, and this mark is exactly the coordinate (comprising horizontal ordinate and ordinate) of tile figure, and this coordinate is for representing the position of this tile figure at original full dose electronic chart; For example, original full dose electronic chart is laterally being divided into N tile figure, longitudinally be divided into M tile figure, wherein, M and N are positive integers, and in full dose electronic chart, the coordinate of the tile figure in the upper left corner is (0,0), the coordinate of the tile figure in the lower right corner is (M-1, N-1).
User end to server sends spatial data request, wherein carries the coordinate of asked tile figure.
Server receives the spatial data request that client sends, and the size (m, n) of the coordinate (x, y) of foundation tile figure wherein and default tile figure utilizes following formula to calculate the center point coordinate that obtains tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
In this formula, c (x, y) is the center point coordinate of tile figure, when f (z) is z for map scale, and the actual range of a pixel representative; Wherein, the size of tile figure is 256 pixel × 256 pixels, corresponding different map scale z, and the actual range of a pixel representative is also different.
Step S102, according to the coordinate of wanting vegetarian refreshments of center point coordinate and tile figure, wants the encoded radio of vegetarian refreshments described in obtaining, described encoded radio is sent to described client.
Concrete, the vegetarian refreshments of wanting in the tile figure of request is traveled through, the coordinate of the coordinate of wanting vegetarian refreshments that foundation traverses and the central point of tile, utilizes following formula to calculate this to want the difference of the central point of vegetarian refreshments and tile figure:
p-c=(x1-x,y1-y)
In this formula, p-c is the difference of wanting the central point of vegetarian refreshments and tile, and (x1, y1), for wanting the coordinate of vegetarian refreshments p, (x, y) is the coordinate of the central point c of tile figure; Server is the difference of the center point coordinate of the coordinate of wanting vegetarian refreshments in tile figure and tile figure, wants the encoded radio of vegetarian refreshments as this.
For example, have a path in tile figure, this path utilizes wants vegetarian refreshments to represent as follows:
p0(x0,y0):(12940445.74,4818304.33)
p1(x1,y1):(12940441.16,4818283.87)
p2(x2,y2):(12940415.38,4818162.66)
p3(x3,y3):(12940397.06,4818070.76)
p4(x4,y4):(12940392.48,4818049.98)
p5(x5,y5):(12940364.53,4818922.47)
p6(x6,y6):(12940347.89,4818836.87)
If server directly sends to client by the above-mentioned coordinate of wanting vegetarian refreshments, the identical high position data in coordinate will repeat transmission, makes to have mass of redundancy data in data volume, utilizes said method of the present invention to process, that is:
The center point coordinate of supposing the tile figure that calculates acquisition is c (12940000,4818000), wants the difference of the coordinate of vegetarian refreshments p0～p6 and the center point coordinate c (12940000,4818000) of tile figure to be:
p0-c:(445.74,304.33)
p1-c:(441.16,283.87)
p2-c:(415.38,162.66)
p3-c:(397.06,70.76)
p4-c:(392.48,49.98)
p5-c:(364.53,-77.53)
p6-c:(347.89,-163.13)
For the coordinate of wanting vegetarian refreshments in the tile figure of above-mentioned acquisition and the difference of center point coordinate, server can directly send to client, also can carry out further compression to this difference processes, with further amount of compressed data, whether no matter server is follow-up carries out other processing, all greatly reduce the high position data in spatial data, the data volume that makes storage and transmission has been greatly reduced, thus carrying cost and the transmission cost of reduction spatial data.
The present invention also provides a kind of disposal route of spatial data, and Fig. 2 is the schematic flow sheet of the preferred embodiment two of the disposal route of implementation space of the present invention data, and as shown in Figure 2, the method comprises the following steps:
Step S201, the encoded radio of wanting vegetarian refreshments that reception server sends according to spatial data request, according to coordinate and the size of default tile figure, obtains the center point coordinate of tile figure.
Concrete, user end to server sends after spatial data request, and waiting for server is returned to the encoded radio of wanting vegetarian refreshments.
The encoded radio of wanting vegetarian refreshments that client server sends, i.e. the difference of the center point coordinate of the coordinate of wanting vegetarian refreshments in tile figure and tile figure; Client, according to the size (m, n) of the coordinate (x, y) of default tile figure and default tile figure, utilizes following formula to obtain the center point coordinate of tile figure at local computing:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
In this formula, c (x, y) is the center point coordinate of tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
Step S202, according to center point coordinate and the encoded radio of wanting vegetarian refreshments of tile figure, obtains the coordinate of wanting vegetarian refreshments.
Concrete, the encoded radio of wanting vegetarian refreshments of receiving due to client is the difference of the center point coordinate of the coordinate of wanting vegetarian refreshments in tile figure and tile figure, client is added the encoded radio of receiving and the center point coordinate that calculates the tile figure obtaining, and obtains the coordinate of wanting vegetarian refreshments in tile figure; Be the center point coordinate of client according to encoded radio and tile figure, reduction obtains the original coordinates of wanting vegetarian refreshments in tile figure, obtains the electronic chart that will show according to the original coordinates obtaining.
It should be noted that, in client reduction tile figure, want the coordinate time of vegetarian refreshments, the center point coordinate of the tile figure utilizing obtains at local computing, rather than obtain the center point coordinate being calculated by server from server, because client obtains the time consuming of center point coordinate at local computing, be less than the time that server transmission center point coordinate consumes to client, and not transmission center point coordinate of server, can also reduce the data volume of transmission.
Utilize technical scheme of the present invention, national data are processed, the spatial data in Yi Mou city is example, and the size of tile figure is 256 pixel × 256 pixels, utilizes the data volume of the encoded radio that the present invention and prior art obtain as shown in table 1:
Table 1
| ? | Data volume |
| Prior art scheme | 40042289bytes |
| Technical scheme of the present invention | 30697591bytes |
As shown in table 1, technical scheme of the present invention can reduce by 24.95% by data volume.
For realizing said method, the present invention also provides a kind of disposal system of spatial data, and this system is corresponding to the method for preferred embodiment one, and Fig. 3 is the structural representation of the preferred embodiment one of the disposal system of implementation space of the present invention data, as shown in Figure 3, this system comprises:
Receiving element 30, the spatial data request of the coordinate that carries tile figure sending for receiving client;
The first processing unit 31, for the size according to the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure;
The second processing unit 32, for the coordinate of wanting vegetarian refreshments according to described center point coordinate and described tile figure, wants the encoded radio of vegetarian refreshments described in obtaining;
Transmitting element 33, for sending to described client by described encoded radio.
Wherein, described the first processing unit 31, according to the size of the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure, comprising:
According to the coordinate (x, y) of described tile figure and the size (m, n) of described tile figure, utilize following formula to obtain the center point coordinate of described tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
Wherein, c (x, y) is the center point coordinate of described tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
Wherein, described the second processing unit 32, according to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, is wanted the encoded radio of vegetarian refreshments described in obtaining, comprising:
According to the difference of described coordinate and the described center point coordinate of wanting vegetarian refreshments, described in obtaining, want the encoded radio of vegetarian refreshments.
The present invention also provides a kind of disposal system of spatial data, and this system is corresponding to the method for preferred embodiment two, and Fig. 4 is the structural representation of the preferred embodiment two of the disposal system of implementation space of the present invention data, and as shown in Figure 4, this system comprises:
Receiving element 40, the encoded radio of wanting vegetarian refreshments sending according to spatial data request for reception server;
The first processing unit 41, for coordinate and the size of the tile figure according to default, obtains the center point coordinate of described tile figure;
The second processing unit 42, for according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, wants the coordinate of vegetarian refreshments described in obtaining.
Wherein, described the second processing unit 42, according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, is wanted the coordinate of vegetarian refreshments described in obtaining, comprising:
According to the described encoded radio of wanting vegetarian refreshments and described center point coordinate and be worth, want the coordinate of vegetarian refreshments described in acquisition.
In technique scheme of the present invention, according to coordinate and the size of tile figure, obtain the center point coordinate of tile figure, all coordinates of wanting vegetarian refreshments in tile figure are all converted to the encoded radio of this center point coordinate relatively, thereby reduce the high position data of the redundancy in key element point coordinate in tile figure, reduce transmitted data amount between server and client, reduce the transmission cost of data.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. a disposal route for spatial data, is characterized in that, the method comprises:
Receive the spatial data request of the coordinate that carries tile figure of client transmission;
According to the size of the coordinate of described tile figure and default tile figure, obtain the center point coordinate of described tile figure;
According to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, described in obtaining, want the encoded radio of vegetarian refreshments;
Described encoded radio is sent to described client.
2. method according to claim 1, is characterized in that, the size of the coordinate of the described tile figure of described foundation and default tile figure obtains the center point coordinate of described tile figure, comprising:
According to the coordinate (x, y) of described tile figure and the size (m, n) of described tile figure, utilize following formula to obtain the center point coordinate of described tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
Wherein, c (x, y) is the center point coordinate of described tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
3. method according to claim 1, is characterized in that, the coordinate of wanting vegetarian refreshments of the described center point coordinate of described foundation and described tile figure is wanted the encoded radio of vegetarian refreshments described in obtaining, and comprising:
According to the difference of described coordinate and the described center point coordinate of wanting vegetarian refreshments, described in obtaining, want the encoded radio of vegetarian refreshments.
4. a disposal route for spatial data, is characterized in that, the method comprises:
The encoded radio of wanting vegetarian refreshments that reception server sends according to spatial data request;
According to coordinate and the size of default tile figure, obtain the center point coordinate of described tile figure;
According to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, described in obtaining, want the coordinate of vegetarian refreshments.
5. method according to claim 4, is characterized in that, the described center point coordinate of described foundation and the described encoded radio of wanting vegetarian refreshments are wanted the coordinate of vegetarian refreshments described in obtaining, and comprising:
According to the described encoded radio of wanting vegetarian refreshments and described center point coordinate and be worth, want the coordinate of vegetarian refreshments described in acquisition.
6. a disposal system for spatial data, is characterized in that, this system comprises:
Receiving element, the spatial data request of the coordinate that carries tile figure sending for receiving client;
The first processing unit, for the size according to the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure;
The second processing unit, for the coordinate of wanting vegetarian refreshments according to described center point coordinate and described tile figure, wants the encoded radio of vegetarian refreshments described in obtaining;
Transmitting element, for sending to described client by described encoded radio.
7. system according to claim 6, is characterized in that, described the first processing unit, according to the size of the coordinate of described tile figure and default tile figure, obtains the center point coordinate of described tile figure, comprising:
According to the coordinate (x, y) of described tile figure and the size (m, n) of described tile figure, utilize following formula to obtain the center point coordinate of described tile figure:
c(x,y)=c((x+1/2)×m×f(z),(y+1/2)×n×f(z))
Wherein, c (x, y) is the center point coordinate of described tile figure, when f (z) is z for map scale, and the actual range of a pixel representative.
8. system according to claim 6, is characterized in that, described the second processing unit, according to the coordinate of wanting vegetarian refreshments of described center point coordinate and described tile figure, is wanted the encoded radio of vegetarian refreshments described in obtaining, comprising:
According to the difference of described coordinate and the described center point coordinate of wanting vegetarian refreshments, described in obtaining, want the encoded radio of vegetarian refreshments.
9. a disposal system for spatial data, is characterized in that, this system comprises:
Receiving element, the encoded radio of wanting vegetarian refreshments sending according to spatial data request for reception server;
The first processing unit, for coordinate and the size of the tile figure according to default, obtains the center point coordinate of described tile figure;
The second processing unit, for according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, wants the coordinate of vegetarian refreshments described in obtaining.
10. system according to claim 9, is characterized in that, described the second processing unit, according to described center point coordinate and the described encoded radio of wanting vegetarian refreshments, is wanted the coordinate of vegetarian refreshments described in obtaining, comprising:
According to the described encoded radio of wanting vegetarian refreshments and described center point coordinate and be worth, want the coordinate of vegetarian refreshments described in acquisition.
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| WO2022170776A1 (en) * | 2021-02-10 | 2022-08-18 | 华为技术有限公司 | Event location transmission method, device and system |
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