方法二:使用工具箱 最近在研究Mapshaper的时候需要提取一个省份的数据做测试,我使用的是青大提供的全国行政区划数据,全国的数据在一块,需要把其中一个省份(以山东为例)的数据提取出来。使用QGIS实现比较简单,这里做个记录。 方法一:先选择后导出 这个方法是最容易想到的方式,把需要选择出来,然后导出。不过选择数据有...
I am extracting data from an ArcGIS Server into QGIS, using the Extract/Clip by Extent processing tool in the Processing Toolbox. The ArcGIS data has several fields that are Coded Value domains (code/name pairs). An example layer is below, though the question is generic. https://m...
I am trying to extract data from a sql table, write it to an object and in turn put that in a list. I'm using VS2017, C# and MS-SQL 2008. When I run the code it extracts the data from the SQL table; d... 模板和代码生成器 ...
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output=r'D:\Documents\Geodata\temp\danube3.shp' expression="name LIKE '%Danube%'" danube=processing.run( 'native:extractbyexpression', {'INPUT': rivers,'EXPRESSION': expression,'OUTPUT': output}, feedback=feedback )['OUTPUT'] print(danube) ...
Add or Export basemaps from google or bing – QGIS Pin/Unpin Labels, Move and resize labels in QGIS Download/Export map in PDF, SVG, Image Use Sentinel Hub in QGIS Download Landsat 8 images in QGIS Create 3D Map View in QGIS Creating, Editing and Mapping in QGIS ...
Download QGIS 3.38.3 for Mac - Create very complex and detail-rich maps using a large variety of spatial data formats such as vector, raster and databases on a multiple operating systems
exporter.exportToImage('path/to/output.png', settings) Automate Attribute Calculations: Calculate a new attribute based on existing attributes. layer = iface.activeLayer() layer.startEditing() for feature in layer.getFeatures(): new_value = feature['attribute1'] * 2 # Example calculation ...
Print Layouts: Add FORCE_RASTER and IMAGE_COMPRESSION parameters to PDF algorithms Expressions: Add new variable form of current feature expression functions Expressions: Add new shared_paths function Expressions: Make_valid and geom_to_array functions Expressions: Concave hull function Data Management: ...
Click on the map and draw a box where the label should be. In theItem Propertiestab, expand theLabelsection and enter a label for the map. Similarly add another labels for data and software credits. Once you are satisfied with the map, you can export it as an Image, PDF or SVG. For...