GA/T 627-2006Specification for data collecting and updating of police geographic information system (English PDF)

4.1 Field measurement

For police basic geographic information and police public geographic information that need to achieve measurement level accuracy, it can be measured by field measurement (such as total station, GPS measurement, etc.). For specific methods, please refer to CJJ8, GB 7931, GB/T 18314.

4.2 Scan vectorization

For data plotted on a paper map, scan vectorization can be performed with reference to GB/T 17160.

4.3 Airborne film acquisition

For police geographic information that requires one-time, large-area update, data processing and information can be processed through aerial photography and satellite remote sensing technology.

Information extraction and update. For specific methods, refer to GB 7931, CH/T 1006.

4.4 Information Census and Entry

For the information such as the house number and the iconic point for the service information reference positioning, it is necessary to collect the information in the initial stage of mass collection.

The business unit formulates uniform rules and organizes the census entry.

4.5 Information Extraction

Information about sports venues, hotels, and other places that are relatively fixed can be extracted from basic geographic information, and business units are using in this layer, you can add the attribute data items required by your organization according to your business needs.

4.6 Map labeling

For people, cases, dynamic information, etc., which have fast changes and high real-time requirements, Web mode, desktop client mode, and no information can be used.

The map annotation method such as line mode performs real-time data acquisition and update.

4.6.1 WEB mode

The user logs in to the unified system through the browser to mark the corresponding map data. Web-based online collection is based on point data.

Line and surface are supplemented.