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2025-01-21 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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Shulou(Shulou.com)06/02 Report--
1. Use ogr2ogr tools
The official website address http://www.gdal.org/ogr2ogr.html, download the required version, considering that the author will often use it in the future, I extracted it to the folder "D:\ App\ Gdal\ release-1500-gdal-2-2-1-mapserver-7-0-6".
The path set in Path for ease of use.
Open a command line window, test the ogr2ogr command failed, display
After running "D:\ App\ Gdal\ release-1500-gdal-2-2-1-mapserver-7-0-6\ SDKShell.bat" in the command line window run as an administrator, you can use the ogr2ogr command.
2. The conversion between geojson and shp
Use the command
Ogr2ogr-lco encoding=UTF-8-f "ESRI Shapefile" E:\ data\ china_20171027_1349.shp E:\ data\ china.json
And
Ogr2ogr-f "GeoJSON" E:\ data\ china_region_20171027_1604.json E:\ data\ china_region_20171027_1604.shp
However, to achieve the conversion between geojson and shp, it should be noted that when there are Chinese characters in geojson, the parameter "- lco encoding=UTF-8" needs to be added, otherwise garbled code will occur and a warning message will be generated. When shp is converted to geojson, no additional parameters are needed, such as increasing the encoding setting, which will also generate a warning message.
3. Data editing
This task is to divide Inner Mongolia into eastern Mongolia and western Mongolia in the national provincial administrative division layer.
The data available include "china.json" and "nei_meng_gu_geo.json" in geojson format.
Due to the use of gdal's ogr2ogr tool, we can easily get the corresponding shp data, we only need to solve the editing of shp.
1) load nei_meng_gu_geo layers in ArcGIS Desktop
2) Open editing tools-> start editing, select features according to business needs, and select merge tools in the editing toolbar
3) after merge, classified rendering, and loading the national provincial administrative divisions, we found that there are many edges in neighboring provinces that either coincide or have gaps, basically no match, such data obviously can not be used. This kind of problem is very common in data editing, mainly because of different data sources and different data accuracy.
4) We use the method of line cutting to solve the problems in 3). Find the "Feature To Line" tool in ArcToolbox
The result is obtained after processing.
Re-open the editing state to edit the Polyline data of nei_meng_gu_geo
Delete the useless line and merge the next trim line
The current effect is as follows
Set to display only Inner Mongolia Polygon
Open it again and start editing, this time editing "china_20171027_1349"
Select the break line and open the advanced editing tool. Select the tool as follows
5) final effect
At this point, the task is complete!
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