CN103839479B - A kind of efficent electronic writing exchange method - Google Patents
A kind of efficent electronic writing exchange method Download PDFInfo
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- CN103839479B CN103839479B CN201210467030.4A CN201210467030A CN103839479B CN 103839479 B CN103839479 B CN 103839479B CN 201210467030 A CN201210467030 A CN 201210467030A CN 103839479 B CN103839479 B CN 103839479B
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Abstract
The invention discloses a kind of efficent electronic writing exchange method, step is as follows: extract the positional information of annotation in different scale electronic chart；Extract the geographic element attribute information associated by annotation to merge with positional information with formatted text storage；Adopting the indexed mode consistent with tile map, formatted text carries out classification piecemeal section, the tile file of generation stores with text mode, file content be the section of corresponding map picture annotation in covering geographic range and correlation attribute information；Tile map service interface is adopted to provide the writing text tile of service end to access service；Client accesses writing text tile by service interface or directly accesses off-line tile file, resolves the annotation range information in tile and correlating factor information；Client realizes annotation information visuallization and interactive function.The present invention can quickly respond user's operation to the word annotation in electronic chart and symbol, it is provided that corresponding information service and interactive interface.
Description
Technical field
The present invention relates to electronic chart application, be specifically related to a kind of efficent electronic writing exchange method, can be applicable to the online or offline e map application software run in the equipment such as desktop computer, Web, mobile phone, panel computer.
Background technology
At present, raster data organizational form is adopted to build electronic chart rather popular, the tile map data type of organization being based especially on pre-generatmg thought is widely used in disparate networks electronic chart, and its core concept is to exchange maximum results on user's visual space for by sacrificing a large amount of pre-treatment job time.Tile is typically via " pre-generatmg " technical limit spacing, this technology refers to according to specific dimensions (if 256 pixels are the length of side) and specific format (such as JPEG), a range of map datum is cut into several rows and the bitmap of some row, and stored by certain indexed mode, tile is also named section.Map datum has the advantages that scope is wide, data volume is big, by cutting into slices, thought only downloads the section filling new region from server end, greatly reduce the data volume of network transmission, make full use of multithreading and the caching technology of browser simultaneously, alleviate the burden of network and server, accelerate client display speed.
But, above-mentioned conventional art system has the disadvantage that 1, annotation in map tile is fused to picture file with geographic element in map vector document, does not comprise information of geographic elements and the positional information of annotation itself, it is impossible to support tile focus function.The expression in map information such as the text that 2, the annotation in map vector document only comprises annotation font, annotation word size, annotation show, and do not comprise associated information of geographic elements or associate instability with geographic element.Therefore, at present most electronic chart softwares can not directly need first to inquire about with the geographic element annotation shown in map when browsing map alternately, Query Result that click map marks so that obtain information service or carry out more alternately.
Summary of the invention
Present invention aims to deficiency of the prior art, a kind of efficent electronic writing exchange method is provided, quickly to respond user's operation to the word annotation in electronic chart and symbol, provide corresponding information service and interactive interface according to operation context.
For completing above-mentioned purpose, the invention provides a kind of efficent electronic writing exchange method, comprise the following steps:
Step S1: extract the positional information of annotation in different scale electronic chart；
Step S2: according to application software demand, extracts the geographic element attribute information associated by annotation and merges with the positional information extracted in described step S1 with formatted text storage；
Step S3: adopt the indexed mode consistent with tile map, formatted text is carried out classification piecemeal section, the tile file generated stores with GML/WKT/GeoJSON text mode, annotation text tile file content be the section of corresponding map picture annotation in covering geographic range and correlation attribute information；
Step S4: adopt WMTS/OGCGeoServicesREST tile map service standard interface to provide the writing text tile of service end to access service；
Step S5:Web client, mobile client access the writing text tile of service end by service interface or directly access off-line tile file, resolve the annotation range information in tile and correlating factor information；
Step S6: client is according to application software demand, it is achieved annotation range information and correlating factor information visuallization and interactive function.
Further, the merging mode in described step S2 is: increase the mode of attribute, element in the step S1 annotation positional information processed, it is achieved merged with positional information by the geographic element attribute information associated by annotation.
Further, employing in the described step S3 indexed mode consistent with tile map is: extract the annotation information represented in each map tile file from annotation text, saving as annotation text tile file, catalogue is consistent with map tile with the organizational form of file.
Further, described step S5 specifically includes following steps:
Step S51: client asks map tile and annotation text tile in same geographic range respectively；
Step S52: the tile content returned according to service end, reads the annotation geographical location information in annotation text tile；
Step S53: by geographical coordinate and screen coordinate transfer algorithm, generate the image focus consistent with annotation position and the size in the map tile of display in screen or can the Custom component of interaction, the click of writing, touch in map tile etc. are operated responding user；
Step S54: contain the information of geographic elements of association in annotation text tile, it is possible to provide different information services according to different types of key element.
Compared with prior art, the invention have the characteristics that: 1, fast response time, annotation scope and correlating factor information have been extracted and pre-generatmg tile from electronic map data, it is to avoid substantial amounts of service end computing；2, bandwidth occupancy is little, and electronic chart annotation tile stores in the form of text, and file is only small is conducive to network to transmit；3, storage takies little, and electronic chart annotation tile stores in the form of text, and file is only small, occupies little space；4, online and off-line all can use, and both can be issued as service by standard or self defined interface, it is also possible to is placed on offline access in client storage；5, compatible good, text formatting can adopt the current international practice standards such as GML, WKT, GeoJSON, and service end access function can also pass through the standard interfaces such as WMTS, OGCGeoServicesREST to be provided.Present invention can apply to the electronic chart softwares such as mutual abundant network electronic map, handheld device electronic chart, be mainly used in the mutual and associated information service etc. of user and electronic chart annotation and symbol.
Detailed description of the invention
Efficent electronic writing exchange method provided by the invention, comprises the following steps:
Step S1: extract the positional information of annotation in different scale electronic chart；
Step S2: according to application software demand, extracts the geographic element attribute information associated by annotation and merges with the positional information extracted in described step S1 with formatted text storage；
Step S3: adopt the indexed mode consistent with tile map, formatted text is carried out classification piecemeal section, the tile file generated stores with GML/WKT/GeoJSON or other multiple text modes, annotation text tile file content be corresponding map picture section annotation in covering geographic range and correlation attribute information；
Step S4: adopt WMTS/OGCGeoServicesREST or other multiple tile map service standard interfaces to provide the writing text tile of service end to access service；
Step S5:Web client, mobile client access the writing text tile of service end by service interface or directly access off-line tile file, resolve the annotation range information in tile and correlating factor information；
Step S6: client is according to application software demand, it is achieved annotation range information and correlating factor information visuallization and interactive function.
The realization of efficent electronic writing exchange method of the present invention, mainly includes techniques below:
1, writing textual technology: under conventional art system, the annotation in map tile is fused to picture file with geographic element in map vector document, does not comprise information of geographic elements and the positional information of annotation itself, it is impossible to support tile focus function.Therefore, before map tile generates, writing positional information at place in map vector document drawing being extracted as formatted text, this formatted text processes can support tile focus function in client through subsequent technology.
2, writing text with associate information of geographic elements integration technology: extract the information of geographic elements associated by annotation, by to above-mentioned annotation formatted text increases the modes such as attribute (Attribute), element (Element), information of geographic elements is integrated into annotation text, thus accessing different information services according to different types of geographic element annotation in supporting practical application.
3, writing text tile technology: adopt the buffer memory consistent with tile map to index, the annotation information represented in each map tile file is extracted from annotation text, saving as annotation text tile file, catalogue is consistent with map tile with the organizational form of file.
4, writing text tile service technology: the tile of tile map service standard interface (such as OGCWMTS, OGCGeoServiceREST etc.) form at present, the present invention is when designing service terminal software, its interface is kept consistent with the service of the map tile of standard, request results is output as text tile simultaneously, so that application developer can with standard interface accessing text tile.
5, writing text tile resolves, expresses and interaction technique: client asks map tile and annotation text tile in same geographic range respectively, read the annotation geographical location information in annotation text tile, by geographical coordinate and screen coordinate transfer algorithm generate the image focus consistent with size with the annotation position in the map tile of display in screen or can be interactive Custom component, the click of writing, touch in map tile etc. are operated responding user；Owing to text tile containing the information of geographic elements of association, therefore different information service can be provided according to different types of key element.
The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (4)
1. an efficent electronic writing exchange method, it is characterised in that comprise the following steps:
Step S1: extract the positional information of annotation in different scale electronic chart；
Step S2: according to application software demand, extracts the information of geographic elements associated by annotation and merges with the positional information extracted in described step S1 with formatted text storage；
Step S3: adopt the indexed mode consistent with tile map, formatted text is carried out classification piecemeal section, the tile file generated stores with GML, WKT or GeoJSON text mode, annotation text tile file content be the section of corresponding map picture annotation in covering geographic range and correlation attribute information；
Step S4: adopt WMTS or OGCGeoServicesREST tile map service standard interface to provide the writing text tile of service end to access service；
Step S5:Web client, the mobile client writing text tile by service standard interface accessing service end, resolves the annotation range information in tile and correlating factor information；
Step S6: client is according to application software demand, it is achieved annotation range information and correlating factor information visuallization and interactive function.
2. a kind of efficent electronic writing exchange method according to claim 1, it is characterized in that, merging mode in described step S2 is: increase the mode of attribute, element in the step S1 annotation positional information processed, it is achieved merged with positional information by the geographic element attribute information associated by annotation.
3. a kind of efficent electronic writing exchange method according to claim 1, it is characterized in that, employing in the described step S3 indexed mode consistent with tile map is: extract the annotation information represented in each map tile file from annotation text, saving as annotation text tile file, catalogue is consistent with map tile with the organizational form of file.
4. a kind of efficent electronic writing exchange method according to claim 1, it is characterised in that described step S5 specifically includes following steps:
Step S51: client asks map tile and annotation text tile in same geographic range respectively；
Step S52: the tile content returned according to service end, reads the annotation geographical location information in annotation text tile；
Step S53: by geographical coordinate and screen coordinate transfer algorithm, generate the image focus consistent with annotation position and the size in the map tile of display in screen or can the Custom component of interaction, to respond user to the click of writing, touch operation in map tile；
Step S54: contain the information of geographic elements of association in annotation text tile, provides different information services according to different types of key element.
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| CN201210467030.4A CN103839479B (en) | 2012-11-20 | 2012-11-20 | A kind of efficent electronic writing exchange method |
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| CN201210467030.4A CN103839479B (en) | 2012-11-20 | 2012-11-20 | A kind of efficent electronic writing exchange method |
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| CN103839479B true CN103839479B (en) | 2016-07-06 |
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Families Citing this family (9)
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| CN104008209B (en) * | 2014-06-20 | 2017-02-01 | 南京大学 | Reading-writing method for MongoDB cluster geographic data stored with GeoJSON format structuring method |
| CN104021210B (en) * | 2014-06-20 | 2017-02-15 | 南京大学 | Geographic data reading and writing method of MongoDB cluster of geographic data stored in GeoJSON-format semi-structured mode |
| CN104966460B (en) * | 2015-06-17 | 2017-11-21 | 中科宇图天下科技有限公司 | A kind of map interlock method |
| CN105160005A (en) * | 2015-09-17 | 2015-12-16 | 西安未来国际信息股份有限公司 | Mass POI (Point Of Interest) map data display method based on Web browser |
| US10417492B2 (en) * | 2016-12-22 | 2019-09-17 | Microsoft Technology Licensing, Llc | Conversion of static images into interactive maps |
| CN109147547A (en) * | 2018-07-26 | 2019-01-04 | 浙江省测绘科学技术研究院 | A kind of annotation bit selecting based on vector tile and dynamic preventing collision method |
| CN109345946B (en) * | 2018-07-27 | 2020-11-03 | 创新先进技术有限公司 | Map data display method, map data display device, electronic equipment and computer storage medium |
| CN110347769B (en) * | 2019-07-09 | 2021-03-30 | 东方网力科技股份有限公司 | Processing method, device, equipment and storage medium for multi-level map tiles |
| CN114185613A (en) * | 2021-11-30 | 2022-03-15 | 广州景骐科技有限公司 | Semantic map partitioning method and device, vehicle and storage medium |
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