CN112950783A - Three-dimensional dynamic loading method and device for raster data - Google Patents
Three-dimensional dynamic loading method and device for raster data Download PDFInfo
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Abstract
The invention provides a three-dimensional dynamic loading method and a three-dimensional dynamic loading device for raster data, which comprise the steps of obtaining the raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data; receiving a set geographical range and a current window display level sent by a user terminal; obtaining a raster file name and a pixel range set according to a set geographical range and a current window display level; traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks; symbolizing the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data; the method comprises the steps of sending a plurality of symbolic raster data to a user terminal so that the user terminal can display the symbolic raster data on a three-dimensional terrain in an overlapping mode, dynamically displaying the raster data through a symbol mapping table, supporting calculation analysis and other operations on the raster data, supporting change comparison and space analysis of time sequence raster data, and meeting practical application requirements of various scenes.
Description
Technical Field
The invention relates to the field of natural resource information statistics, in particular to a three-dimensional dynamic loading method and device of raster data.
Background
In a three-dimensional geographic information system, raster data such as elevation, gradient and slope direction are important basic information sources, and the method has an important supporting function for rapidly mastering the natural geographic pattern and the territorial spatial distribution condition of a three-dimensional geographic space.
The traditional three-dimensional geographic information system adopts a static raster data service method, namely slicing raster data and issuing the sliced raster data into static WMTS geographic information service, and then overlapping the static WMTS geographic information service in the three-dimensional geographic information system to form pre-symbolic raster static data. However, in the static raster tile service of this type, since the raster data is pre-symbolized and then sliced into the static tile picture, the picture visualization of the raster data is performed at the user terminal, and the operations such as raster data calculation and analysis are not supported, for example, the distribution of different elevation zones and gradient zones cannot be calculated, and thus the actual application requirements such as large-scale gradient calculation and analysis are not satisfied.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for dynamically loading raster data in three dimensions, which dynamically display raster data through a symbol mapping table, support operations such as calculation and analysis on raster data, support change comparison and spatial analysis of time series raster data, and meet actual application requirements of various scenes.
In a first aspect, an embodiment of the present invention provides a method for three-dimensional dynamic loading of raster data, which is applied to a server, and the method includes:
acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
obtaining a raster file name and a pixel range set according to the set geographical range and the current window display level;
traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks;
symbolizing the target grid blocks through the symbol mapping table to obtain a plurality of symbolized grid data;
and sending the plurality of symbolized raster data to the user terminal so that the user terminal displays the symbolized raster data in a three-dimensional terrain in an overlapping mode.
Further, the establishing a Geohash-T spatiotemporal grid index and a symbol mapping table according to the raster data includes:
acquiring the corresponding relation between the space range of the raster data and a file;
and constructing the Geohash-T space-time grid index according to the corresponding relation between the spatial range of the raster data and the file.
Further, the establishing a Geohash-T spatiotemporal grid index and a symbol mapping table according to the raster data includes:
counting the pixel gray value range of the raster data;
carrying out grade division on the pixel gray value range by adopting a linear division method to obtain pixel gray value ranges of multiple grades;
setting corresponding color values for the pixel gray value range of each grade;
and constructing the symbol mapping table according to the corresponding relation between the pixel gray value range of each grade and the color value.
Further, the method further comprises:
when the set geographical range and the current window display level are changed, receiving an updated geographical range and an updated window display level sent by the user terminal;
obtaining an updated raster file name and an updated pixel range set according to the updated geographic range and the updated window display level;
traversing the updated raster file and the updated pixel range set to obtain a plurality of updated target raster blocks;
symbolizing the updated target grid blocks through the coincidence mapping table to obtain updated symbolized grid data;
and sending the plurality of updated symbolized raster data to the user terminal so that the user terminal displays the updated symbolized raster data in an overlapping mode.
Further, the method further comprises:
and issuing the grid index through a geographic information service standard and an interface to obtain a standard WMTS network geographic information service.
Further, the method further comprises:
and classifying the raster data to obtain a framing raster data set.
In a second aspect, an embodiment of the present invention provides a device for three-dimensional dynamic loading of raster data, which is applied to a server, and the device includes:
the system comprises a building unit, a symbol mapping unit and a time-space grid index generating unit, wherein the building unit is used for obtaining raster data and building a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
the receiving unit is used for receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
the pixel range set acquisition unit is used for acquiring a raster file name and a pixel range set according to the set geographical range and the current window display level;
the traversal unit is used for traversing the raster file names and the pixel range set to obtain a plurality of target raster blocks;
the symbolization unit is used for symbolizing the target grid blocks through the symbol mapping table to obtain a plurality of symbolized grid data;
a sending unit, configured to send the multiple symbolic raster data to the user terminal, so that the user terminal displays the symbolic raster data in a three-dimensional terrain in an overlapping manner.
Further, the establishing unit is specifically configured to:
acquiring the corresponding relation between the space range of the raster data and a file;
and constructing the Geohash-T space-time grid index according to the corresponding relation between the spatial range of the raster data and the file.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the method described above when executing the computer program.
In a fourth aspect, embodiments of the invention provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method as described above.
The embodiment of the invention provides a three-dimensional dynamic loading method and a three-dimensional dynamic loading device for raster data, which are applied to a server and comprise the following steps: acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data; receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level; obtaining a raster file name and a pixel range set according to a set geographical range and a current window display level; traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks; symbolizing the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data; the method comprises the steps of sending a plurality of symbolic raster data to a user terminal so that the user terminal can display the symbolic raster data on a three-dimensional terrain in an overlapping mode, dynamically displaying the raster data through a symbol mapping table, supporting calculation analysis and other operations on the raster data, supporting change comparison and space analysis of time sequence raster data, and meeting practical application requirements of various scenes.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a three-dimensional dynamic loading method for raster data according to an embodiment of the present invention;
fig. 2 is a flowchart of step S101 in a method for dynamically loading raster data in three dimensions according to an embodiment of the present invention;
fig. 3 is a flowchart of step S101 in another method for dynamically loading raster data in three dimensions according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a three-dimensional dynamic loading apparatus for raster data according to a second embodiment of the present invention.
Icon:
1-a building unit; 2-a receiving unit; 3-a pixel range set acquisition unit; 4-traversing unit; 5-a symbolization unit; 6-sending unit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the understanding of the present embodiment, the following detailed description will be given of the embodiment of the present invention.
The first embodiment is as follows:
fig. 1 is a flowchart of a three-dimensional dynamic loading method for raster data according to an embodiment of the present invention.
Referring to fig. 1, the execution subject is a server, and the method includes the steps of:
step S101, acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
step S102, receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
here, the user terminal refers to a three-dimensional map engine at the front end of a computer or a mobile phone. The grid data are organized in order by adopting Geohash-T space-time grid index, and the time information of the grid data is identified by adopting a timestamp.
Wherein, the Geohash-T coding rule is as follows: geohash encoding + 8-bit time encoding, e.g. 1110011101001000111120160103, where 11100111010010001111 is the Geohash encoding and 20160103 is the time encoding.
Step S103, obtaining a raster file name and a pixel range set according to a set geographical range and a current window display level;
step S104, traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks;
specifically, the raster file name and the pixel range set are traversed in parallel, that is, each raster file name, the corresponding display hierarchy and the corresponding pixel range are traversed in sequence, and the target raster block is read in real time.
Step S105, performing symbolization on the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data;
and step S106, sending the plurality of symbolic raster data to the user terminal so that the user terminal can superpose and display the symbolic raster data on the three-dimensional terrain.
Specifically, after traversing the raster file name and the pixel range set, a plurality of target raster blocks are obtained; the server signs a plurality of target grid blocks through a symbol mapping table, sends the obtained signed grid data to the user terminal, and the user terminal displays the signed grid data on the three-dimensional terrain in a superposition mode according to the three-dimensional display interface.
Further, referring to fig. 2, step S101 includes the steps of:
step S201, acquiring a corresponding relation between a space range of raster data and a file;
and S202, constructing a Geohash-T space-time grid index according to the corresponding relation between the space range of the raster data and the file.
Specifically, the corresponding relation between the spatial range of the raster data and the file is obtained, so that a Geohash-T space-time grid index is constructed, and the spatial ranges of all the raster data and the paths of the raster data corresponding to each grid are identified.
And gradually establishing a file pyramid for the raster data, storing the file pyramid in the same directory as the original raster data, and naming by adopting a unified rule.
Further, referring to fig. 3, step S101 further includes the following steps:
step S301, counting a pixel gray value range of the grid data;
step S302, carrying out grade division on the pixel gray scale value range by adopting a linear division method to obtain pixel gray scale value ranges of multiple grades;
step S303, setting corresponding color values for the pixel gray value range of each grade;
and step S304, constructing a symbol mapping table according to the corresponding relation between the pixel gray scale value range and the color value of each grade.
Here, the pixel gradation value range of each level sets the corresponding color value as the initial color value.
Further, the method comprises the following steps:
step S401, when the set geographical range and the current window display level are changed, receiving an updated geographical range and an updated window display level sent by a user terminal;
step S402, obtaining an updated raster file name and an updated pixel range set according to the updated geographic range and the updated window display level;
step S403, traversing the updated raster file and the updated pixel range set to obtain a plurality of updated target raster blocks;
step S404, symbolizing a plurality of updated target grid blocks through a coincidence mapping table to obtain a plurality of updated symbolized grid data;
step S405, sending the plurality of updated symbolized raster data to the user terminal, so that the user terminal displays the updated symbolized raster data in an overlapping manner.
Specifically, the user terminal can change the set geographical range and the current window display level, so as to browse raster data in different positions and different levels. When the user terminal changes the set geographical range and the current window display level, acquiring an updated geographical range and an updated window display level in real time; obtaining an updated raster file name and an updated pixel range set according to the updated geographic range and the updated window display level; traversing the updated raster file and the updated pixel range set to obtain a plurality of updated target raster blocks; symbolizing the updated target grid blocks through a coincidence mapping table to obtain updated symbolized grid data; and sending the plurality of updated symbolized raster data to the user terminal so that the user terminal displays the updated symbolized raster data in a superposition manner, thereby refreshing the raster data of the updated geographical range and the updated window display level, dynamically displaying the raster data according to the symbol mapping table, and dynamically displaying different raster data at the user terminal when different symbol mapping tables are adjusted.
For raster data of a current window display level, when a set filtering condition and a set target color value of a pixel value range are input, a server obtains all raster file names and a set of pixel ranges in the set pixel value range according to the set filtering condition and the set target color value of the pixel value range; performing parallel traversal on all the raster file names and the pixel range set in the set pixel value range to obtain a plurality of target raster blocks in the current level and the set pixel value range, performing symbolization through a symbol mapping table, performing target color value rendering on pixels meeting filtering conditions, and rendering pixels not meeting the filtering conditions to be transparent; finally, the symbolic raster data meeting the conditions are displayed on the user terminal in an overlapping mode, dynamic filtering and symbolization of raster data according to the set raster numerical value conditions can be achieved, and for example, the gradient distribution range of the gradient value between 15 degrees and 25 degrees is displayed; and the operation such as calculation analysis of the raster data is supported, the change comparison and the space analysis of the time sequence raster data are supported, and the actual application requirements of various scenes are met.
Further, the method comprises the following steps:
step S501, the grid index is issued through the geographic information service standard and the interface, and the standard WMTS network geographic information service is obtained.
Specifically, the geographic information service standard may be an OGC WMTS standard, and the interface may be a WebServices interface. The method comprises the steps of issuing a grid index into a standard WMTS network geographic information service by adopting a geographic information service standard and an interface, wherein WMTS (OpenGIS Web Map Title service) provides a standardized solution for issuing a digital Map service by adopting a predefined graphic block method.
Further, the method comprises the following steps:
step S601, the raster data is classified to obtain a framing raster data set.
Specifically, the raster data may be raster data within a set range, the raster data is classified to obtain an amplitude raster data set, and the amplitude raster data set is stored; and according to the access path, the corresponding raster data can be accurately requested.
The embodiment of the invention provides a three-dimensional dynamic loading method of raster data, which is applied to a server and comprises the following steps: acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data; receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level; obtaining a raster file name and a pixel range set according to a set geographical range and a current window display level; traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks; symbolizing the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data; the method comprises the steps of sending a plurality of symbolic raster data to a user terminal so that the user terminal can display the symbolic raster data on a three-dimensional terrain in an overlapping mode, dynamically displaying the raster data through a symbol mapping table, supporting calculation analysis and other operations on the raster data, supporting change comparison and space analysis of time sequence raster data, and meeting practical application requirements of various scenes.
Example two:
fig. 4 is a schematic diagram of a three-dimensional dynamic loading apparatus for raster data according to a second embodiment of the present invention.
Referring to fig. 4, the server includes:
the system comprises an establishing unit 1, a symbol mapping unit and a time-space grid generating unit, wherein the establishing unit 1 is used for acquiring raster data and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
the receiving unit 2 is used for receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
the pixel range set acquisition unit 3 is used for acquiring a raster file name and a pixel range set according to a set geographical range and a current window display level;
the traversal unit 4 is used for traversing the raster file names and the pixel range set to obtain a plurality of target raster blocks;
the symbolization unit 5 is used for symbolizing the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data;
and the transmitting unit 6 is used for transmitting the plurality of symbolized raster data to the user terminal so that the user terminal superposes and displays the symbolized raster data on the three-dimensional terrain.
Further, the establishing unit 1 is specifically configured to:
acquiring the corresponding relation between the space range of the raster data and the file;
and constructing a Geohash-T space-time grid index according to the corresponding relation between the space range of the raster data and the file.
The embodiment of the invention provides a three-dimensional dynamic loading device of raster data, which is applied to a server and comprises the following components: acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data; receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level; obtaining a raster file name and a pixel range set according to a set geographical range and a current window display level; traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks; symbolizing the target grid blocks through a symbol mapping table to obtain a plurality of symbolized grid data; the method comprises the steps of sending a plurality of symbolic raster data to a user terminal so that the user terminal can display the symbolic raster data on a three-dimensional terrain in an overlapping mode, dynamically displaying the raster data through a symbol mapping table, supporting calculation analysis and other operations on the raster data, supporting change comparison and space analysis of time sequence raster data, and meeting practical application requirements of various scenes.
The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the method for three-dimensional dynamic loading of raster data provided in the foregoing embodiment are implemented.
The embodiment of the present invention further provides a computer readable medium having a non-volatile program code executable by a processor, where the computer readable medium stores a computer program, and the computer program is executed by the processor to perform the steps of the method for three-dimensional dynamic loading of raster data according to the above embodiment.
The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for three-dimensional dynamic loading of raster data is applied to a server, and comprises the following steps:
acquiring raster data, and establishing a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
obtaining a raster file name and a pixel range set according to the set geographical range and the current window display level;
traversing the raster file name and the pixel range set to obtain a plurality of target raster blocks;
symbolizing the target grid blocks through the symbol mapping table to obtain a plurality of symbolized grid data;
and sending the plurality of symbolic raster data to the user terminal so that the user terminal displays the symbolic raster data on a three-dimensional terrain in an overlapping mode.
2. The method for three-dimensional dynamic loading of raster data as claimed in claim 1, wherein said building a Geohash-T spatiotemporal grid index and a symbol mapping table from said raster data comprises:
acquiring the corresponding relation between the space range of the raster data and a file;
and constructing the Geohash-T space-time grid index according to the corresponding relation between the spatial range of the raster data and the file.
3. The method for three-dimensional dynamic loading of raster data as claimed in claim 1, wherein said building a Geohash-T spatiotemporal grid index and a symbol mapping table from said raster data comprises:
counting the pixel gray value range of the raster data;
carrying out grade division on the pixel gray value range by adopting a linear division method to obtain pixel gray value ranges of multiple grades;
setting corresponding color values for the pixel gray value range of each grade;
and constructing the symbol mapping table according to the corresponding relation between the pixel gray value range of each grade and the color value.
4. The method for three-dimensional dynamic loading of raster data as claimed in claim 1, characterized in that the method further comprises:
when the set geographical range and the current window display level are changed, receiving an updated geographical range and an updated window display level sent by the user terminal;
obtaining an updated raster file name and an updated pixel range set according to the updated geographic range and the updated window display level;
traversing the updated raster file and the updated pixel range set to obtain a plurality of updated target raster blocks;
symbolizing the updated target grid blocks through the symbol mapping table to obtain updated symbolized grid data;
and sending the plurality of updated symbolized raster data to the user terminal so that the user terminal displays the updated symbolized raster data in an overlapping mode.
5. The method for three-dimensional dynamic loading of raster data as claimed in claim 1, characterized in that the method further comprises:
and issuing the grid index through a geographic information service standard and an interface to obtain a standard WMTS network geographic information service.
6. The method for three-dimensional dynamic loading of raster data as claimed in claim 1, characterized in that the method further comprises:
and classifying the raster data to obtain a framing raster data set.
7. An apparatus for three-dimensional dynamic loading of raster data, applied to a server, the apparatus comprising:
the system comprises a building unit, a symbol mapping unit and a time-space grid index generating unit, wherein the building unit is used for obtaining raster data and building a Geohash-T space-time grid index and a symbol mapping table according to the raster data;
the receiving unit is used for receiving request information sent by a user terminal, wherein the request information comprises a set geographical range and a current window display level;
the pixel range set acquisition unit is used for acquiring a raster file name and a pixel range set according to the set geographical range and the current window display level;
the traversal unit is used for traversing the raster file names and the pixel range set to obtain a plurality of target raster blocks;
the symbolization unit is used for symbolizing the target grid blocks through the symbol mapping table to obtain a plurality of symbolized grid data;
a sending unit, configured to send the multiple symbolic raster data to the user terminal, so that the user terminal displays the symbolic raster data in a three-dimensional terrain in an overlapping manner.
8. The apparatus for three-dimensional dynamic loading of raster data according to claim 7, wherein the establishing unit is specifically configured to:
acquiring the corresponding relation between the space range of the raster data and a file;
and constructing the Geohash-T space-time grid index according to the corresponding relation between the spatial range of the raster data and the file.
9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1 to 6 when executing the computer program.
10. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to perform the method of any of claims 1 to 6.
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| CN114328782A (en) * | 2021-12-24 | 2022-04-12 | 中科三清科技有限公司 | Geographic vector data processing method, electronic device and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833780A (en) * | 2010-05-07 | 2010-09-15 | 南京大学 | Run expression and operation-based map drawing method |
| CN105069020A (en) * | 2015-07-14 | 2015-11-18 | 国家信息中心 | 3D visualization method and system of natural resource data |
| US20170039757A1 (en) * | 2012-06-05 | 2017-02-09 | Apple Inc. | Methods and Apparatus for Building a Three-Dimensional Model from Multiple Data Sets |
| CN106844519A (en) * | 2016-12-29 | 2017-06-13 | 中国科学院电子学研究所苏州研究院 | Remote sensing special topic product method for visualizing based on three-dimensional digital earth |
| CN106960029A (en) * | 2017-03-21 | 2017-07-18 | 刘博宇 | A kind of method for extracting across map sheet geographic range framing raster data |
-
2021
- 2021-04-23 CN CN202110445640.3A patent/CN112950783B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833780A (en) * | 2010-05-07 | 2010-09-15 | 南京大学 | Run expression and operation-based map drawing method |
| US20170039757A1 (en) * | 2012-06-05 | 2017-02-09 | Apple Inc. | Methods and Apparatus for Building a Three-Dimensional Model from Multiple Data Sets |
| CN105069020A (en) * | 2015-07-14 | 2015-11-18 | 国家信息中心 | 3D visualization method and system of natural resource data |
| CN106844519A (en) * | 2016-12-29 | 2017-06-13 | 中国科学院电子学研究所苏州研究院 | Remote sensing special topic product method for visualizing based on three-dimensional digital earth |
| CN106960029A (en) * | 2017-03-21 | 2017-07-18 | 刘博宇 | A kind of method for extracting across map sheet geographic range framing raster data |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114328782A (en) * | 2021-12-24 | 2022-04-12 | 中科三清科技有限公司 | Geographic vector data processing method, electronic device and storage medium |
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