CN1971560A - Method of generating and organizing source data of grid electron map and method of generating target data - Google Patents
Method of generating and organizing source data of grid electron map and method of generating target data Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000013598 vector Substances 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 101150064138 MAP1 gene Proteins 0.000 claims description 2
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- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 4
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Abstract
A method for generating and organizing the source data of grid electronic map and generating the target data is disclosed, it can realize the map to match with the GP8 location information is finished on the sever, use the vector map and the engine of vector map to form the grid map file with various specification, the source data of grid map is generated, the grid map file uses the database and the file index to store the coordinate and the index of the grid map file, the target grid map specification requirement and the latitude and longitude information is transmitted by the HTTP\SOCKET\message mechanism, the map generating system will search the database or file to obtain the source data of grid map, and clip and splice to generate the target grid map and transmit to the target application; the vector map is called by the vector map engine, and read the present scale and the latitude and longitude information at the left upper corner or right upper corner; copy the map as the grip file, save the all path name of file containing the stored coordinate to the appointed store items in the scale table of the database array.
Description
Technical field
The present invention relates to the dynamic making of the grating map in the Geographic Information System (GIS) and the method for expression.Especially the method that source data of grid electron map generation, tissue and target data generate.
Background technology
The electronic chart that grid electron map is widely used on the WEB shows, the engine that provides powerful for the map on the Web shows at Web interactive mode, concurrent visit and data traffic restriction characteristics supports, and also can be used for the conventional research and development of map being upgraded less demanding application program.
Electronic chart (b/s structure) mainly comprises dual mode.A kind of is approach vector, a kind of grid mode.
Approach vector: according to volume coordinate point data and mathematical formulae, this locality by client computer drives describes map.
The grid mode: the mode by picture is come displayed map.
Correspond to two kinds of above published methods, the b/s structure can be subdivided into fat b/s structure and thin b/s structure again.
Fat b/s: fat browser/server mechanism, the calculating of map and the process of drafting are finished in client.
Thin b/s: the degree browser/server structure, the calculating of map and drafting are all finished at server end.Client browser only Shows Picture.
For the grid mode, its speed each time all is balanced, mapping is each time all entrusted at server, and the key of speed can be by promoting server hardware or providing distributed service to come pulling speed just on the bandwidth of the performance of server and network like this.Because carry out complicated calculating and mapping at server end, theoretically, the data volume that server end can be supported is infinitely-great, and speed can not be affected.
The just picture that resource occupation, grid mode show is to the client computer requirement that has nothing special.
Thin b/s structure is a developing direction of Web publishing.It does not rely on Client OS, browser, as long as carry out technical improvement at server end, just can provide better service.Along with in hardware technology, caching technology, distribution is the development of technology, the lifting of the network bandwidth in addition, being distributed on the speed of grid mode will significantly promote.A kind of among thin b/s (grid mode) or the fat b/s (approach vector) can be selected in LAN (Local Area Network) inside, preferably adopts thin b/s (grid mode) in issue on the Internet; If require in real time than higher, fat b/s structure is adopted in suggestion, if lower for real-time requirement, adopts thin b/s structure.Certainly this neither be absolute.Need carry out overall consideration according to concrete project.
CN1702432 discloses method for processing dynamic display of grid electronic map, this method is carried out according to the following steps: (1) selects the figure source, check the accuracy in this figure source, seedbed figure is cut apart in the feature in view source and user's requirement again, and the latitude and longitude coordinates scope of good each piece of mark, map content and latitude and longitude information packing data are become the electron grid map data file; (2) the electron grid map data file is downloaded on the terminal, when terminal receives correct gps signal, from signal, take out the current latitude and longitude information of terminal, this information and the latitude and longitude information that is stored in each the piece map in the electron grid map are compared, obtain plot figure and then it is presented on the LCD screen, on this map, indicate the present located geographic position according to proportionate relationship.The present invention makes and uses grid electron map by own electronic map data specification for structure, is implemented in the demonstration of large format electronic chart in the LCD screen limited area and the realization of location navigation function.
The limitation that the granularity that aforesaid way figure is cut apart in the source is shown by terminal, and be to download to carry out assembly unit on the terminal and form complete map and show.
Summary of the invention
The present invention seeks to: propose the method that a kind of source data of grid electron map generation, tissue and target data generate, the coupling of realization map and GPS positional information is finished on server, granularity that figure is cut apart in the source and display end are irrelevant, and based on map splicing performance setting granularity.
Source data of grid electron map generates, the method that tissue and target data generate, the coupling of realization map and GPS positional information is finished on server, utilize map vector to generate the grating map file of plurality of specifications by the map vector engine, form the grating map source data, the grating map file uses database or file index, the coordinate and the index-name of storage grating map file, by HTTP SOCKET message mechanism transmit target grating map specification requirement and latitude and longitude information, map generation system will be retrieved from database or file, obtain the grating map source data, and cut out that splicing generates the target grating map and packing is delivered to intended application; It is characterized in that may further comprise the steps:
A) source data of grid electron map generates, organizes: use the map vector engine to call in map vector, read the upper left corner or the lower right corner longitude and latitude coordinate of the current ratio of map, map vector; The copy map is a raster file, deposits in the data battle array comspec of file in designated ratio table Storage Item, comprises the storage coordinate of above-mentioned acquisition;
B) request of target grid electron map, generation strategy:
Map inquiry request of SOCKET/HTTP receiving target and analysis request, obtain the central point longitude and latitude coordinate of map, the wide height and the scaling of map, message mechanism transmits target grating map specification requirement and latitude and longitude information, map generation system will be retrieved from database or file, obtain the grating map source data, and cut out that splicing generates the target grating map and packing is delivered to intended application.
The present invention is by the upper left corner or the lower right corner longitude and latitude coordinate of compute vectors map; (Map1, the Map2) picture in the scope splice and are transferred to far call the comparison of search data source index in the grid electron map source.
Source data of grid electron map generates, method for organizing is: source data of grid electron map is made up of multiple scaling, plurality of pictures, exists under the designated directory; Utilize the relation between the scaling information, picture, figure title, longitude and latitude scope of database storing source data of grid electron map; Utilize Zoom scaling table, each line data is represented a kind of different image zooming ratio in the Zoom table.Each ratio has a table corresponding with it in database, and table name is identical with TableName in the Zoom scaling table.A table is corresponding with a kind of scaling, and each line item is stored a source data of grid electron map information, comprises the geographic coordinate lower right corner, the upper left corner geographic coordinate of filename and this picture.
The table of said structure has many in database, the table number depends on the record number in the Zoom table.The Name field comprises path, source data of grid electron map picture place, graphic file suffix name.Canned data in source data of grid electron map file and the database is consistent, and filename is identical with the Name field, and longitude and latitude is accurate.
Improvement of the present invention also comprises: the source data of grid electron map picture with a kind of ratio each other can be overlapping on longitude and latitude, but can not be overlapping fully, between the adjacent picture of longitude and latitude the space can be arranged, but for guaranteeing that picture generates quality, reduces the space number.Making coverage rate with a kind of source data of grid electron map picture of ratio guarantees have figure to generate.
Set up many cover scaling source data of grid electron map pictures, the Target Photo of best convergent-divergent requirement is provided, system supports single ratio picture.Granularity that the organization chart source is cut apart and display end are irrelevant, and based on map splicing performance setting granularity.Specification needs to decide on concrete application and user.
Characteristics of the present invention are, the invention provides source data of grid electron map generates, tissue and target data generation method, forming grating map source data specification needs to decide on concrete application and user, the grating map file uses database or file index, the coordinate and the index-name of storage grating map file, intended application by HTTP SOCKET message mechanism transmit target grating map specification requirement and latitude and longitude information, map generation system will be retrieved from database or file, obtain the grating map source data, and cut out that splicing generates the target grating map and packing is delivered to intended application.
Description of drawings
Fig. 1 is that source data of grid electron map of the present invention generates, organizes synoptic diagram
Fig. 2 is target grid electron map of the present invention request, generation strategy synoptic diagram
Fig. 3 starts (stopping) service module synoptic diagram
Fig. 4 the present invention generates the grating map module diagram
Fig. 5 is that parameter of the present invention is provided with module diagram
Fig. 6 is the process flow diagram that source data of grid electron map generation, tissue and the target data of OCKET/HTTP receiving target map inquiry request of the present invention generates.
Embodiment
(1) source data of grid electron map generates, organizes
Source data of grid electron map is made up of multiple scaling, plurality of pictures, exists under the designated directory.
Utilize the relation between the scaling information, picture, figure title, longitude and latitude scope of database storing source data of grid electron map.
A) database is built the storehouse requirement
Table name 1:Zoom
| Field name | Type | Major key | Explanation |
| Zoom | Numeral | Not | |
| TableName | Text | Be |
Each line data is represented a kind of different image zooming ratio in the Zoom table.Each ratio has a table corresponding with it in database, and table name is identical with TableName in the Zoom table.
Table name 2: the TableName field contents during promptly Zoom shows
| Field name | Type | Major key | Explanation |
| Name | Text | Be | Grid reference base picture name |
| X1 | Numeral | Upper left corner longitude | |
| Y1 | Numeral | Upper left corner latitude | |
| X2 | Numeral | Lower right corner longitude | |
| Y2 | Numeral | Lower right corner latitude |
The table of this structure has many in database, the table number depends on the record number in the Zoom table.
A table is corresponding with a kind of scaling, and each line item is stored a source data of grid electron map information, comprises the geographic coordinate lower right corner, the upper left corner geographic coordinate of filename and this picture.
The Name field comprises path, source data of grid electron map picture place, graphic file suffix name.
B) source data of grid electron map documentation requirements
Be consistent with the canned data in the database, filename is identical with the Name field, and longitude and latitude is accurate.Picture adopts the storage of Png graphical format.
C) explanation
Source data of grid electron map picture with a kind of ratio each other can be overlapping on longitude and latitude, but can not be overlapping fully, between the adjacent picture of longitude and latitude the space can be arranged, but for guaranteeing that picture generates quality, reduces the space number.
Making coverage rate with a kind of source data of grid electron map picture of ratio is not done the pressure requirement, but coverage rate can guarantee that greatly figure generates.
Set up many cover scaling source data of grid electron map pictures, the Target Photo of best convergent-divergent requirement can be provided, system can support single ratio picture.
(2) request of target grid electron map, generation strategy
Web server is sent to the GIS server with location information data among Fig. 1, and the GIS server generates target grating map picture, calls for Web server.As shown in the figure.
Modular structure and treatment scheme:
A) start (stopping) service
Carry out when system start-up (stopping).
B) generate grating map module diagram (Fig. 4), Fig. 3 starts (stopping) service module synoptic diagram
C) parameter is provided with module diagram (Fig. 5)
D) source data of grid electron map generates, organizes synoptic diagram
E) target grid electron map request, generation strategy synoptic diagram (Fig. 2).
Fig. 6 is map inquiry request of SOCKET/HTTP receiving target and analysis request, transmits the process flow diagram of target grating map specification requirement and latitude and longitude information.
Claims (5)
1, source data of grid electron map generates, the method that tissue and target data generate, the coupling of realization map and GPS positional information is also finished on server, utilize map vector to generate the grating map file of plurality of specifications by the map vector engine, form the grating map source data, the grating map file uses database or file index, the coordinate and the index-name of storage grating map file, by HTTP SOCKET message mechanism transmit target grating map specification requirement and latitude and longitude information, map generation system will be retrieved from database or file, obtain the grating map source data, and cut out that splicing generates the target grating map and packing is delivered to intended application; It is characterized in that may further comprise the steps:
1) source data of grid electron map generates, organizes: use the map vector engine to call in map vector, read the upper left corner or the lower right corner longitude and latitude coordinate of the current ratio of map, map vector; The copy map is a raster file, deposits in the data battle array comspec of file in designated ratio table Storage Item, comprises the storage coordinate of above-mentioned acquisition;
2) request of target grid electron map, generation strategy:
Map inquiry request of SOCKET/HTTP receiving target and analysis request, obtain the central point longitude and latitude coordinate of map, the wide height and the scaling of map, message mechanism transmits target grating map specification requirement and latitude and longitude information, map generation system will be retrieved from database or file, obtain the grating map source data, and cut out that splicing generates the target grating map and packing is delivered to intended application.
2, the method that source data of grid electron map generation according to claim 1, tissue and target data generate is characterized in that the upper left corner or lower right corner longitude and latitude coordinate by the compute vectors map; Index comparison in search data source is at grid electron map source Map1, and the picture in the Map2 scope splices and is transferred to far call.
3, source data of grid electron map according to claim 1 generate, and the method that generates of target data be: it is characterized in that source data of grid electron map is made up of multiple scaling, plurality of pictures, exist under the designated directory; Utilize the relation between the scaling information, picture, figure title, longitude and latitude scope of database storing source data of grid electron map; Utilize Zoom scaling table, each line data is represented a kind of different image zooming ratio in the Zoom table; Each ratio has a table corresponding with it in database, and table name is identical with TableName in the Zoom scaling table; A table is corresponding with a kind of scaling, and each line item is stored a source data of grid electron map information, comprises the geographic coordinate lower right corner, the upper left corner geographic coordinate of filename and this picture.
4, source data of grid electron map according to claim 1 generate, and the method that generates of target data be: the table that it is characterized in that described structure has many in database, the table number depends on the record number in the Zoom table, and the Name field comprises path, source data of grid electron map picture place, graphic file suffix name; Canned data in source data of grid electron map file and the database is consistent, and filename is identical with the Name field, and longitude and latitude is accurate.
5, source data of grid electron map according to claim 1 generate, and the method that generates of target data be: it is characterized in that with a kind of source data of grid electron map picture of ratio overlapping on longitude and latitude each other.
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| CNB2006100965109A CN100452050C (en) | 2006-09-28 | 2006-09-28 | Method of generating and organizing source data of grid electron map and method of generating target data |
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| CNB2006100965109A CN100452050C (en) | 2006-09-28 | 2006-09-28 | Method of generating and organizing source data of grid electron map and method of generating target data |
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| CN111078153A (en) * | 2019-12-20 | 2020-04-28 | 同方知网(北京)技术有限公司 | Distributed storage method based on files |
| CN111611212A (en) * | 2020-05-15 | 2020-09-01 | 交通运输部规划研究院 | Method and device for packaging raster map file and storage medium |
| CN116736971A (en) * | 2022-10-17 | 2023-09-12 | 荣耀终端有限公司 | Map data processing method, map display method and map display equipment |
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