Geometry type: Points (选择点、线、多边形) Project CRS:与整个项目保持一致 New field:设置域名和域的数据类型。本例中设置高程(整数)和山名(文字)两个域。注意设置完要点击Add to fields List,使得设置的域在下方的表格中出现才算完成。 完成设置,点击OK,可以在左侧Layers中看到刚刚创建的图层。 为山峰定位...
points = [QgsPoint(minx, miny), QgsPoint(minx, maxy), QgsPoint(maxx, maxy), QgsPoint(maxx, miny), QgsPoint(minx, miny)]# create featureprint("add feature to layer:%s..."% (layername)) line_feature = QgsFeature(lineVecLayer.fields()) line_feature.setGeometry(QgsGeometry().fromPolyline...
Performing Spatial Queries (QGIS3) Nearest Neighbor Analysis (QGIS3) Sampling Raster Data using Points or Polygons (QGIS3) Calculating Raster Area (QGIS3) Creating Heatmaps (QGIS3) Animating Time Series Data (QGIS3) Handling Invalid Geometries (QGIS3)Advanced GIS operationsAdvanced...
Performing Spatial Joins (QGIS3) Performing Spatial Queries (QGIS3) Nearest Neighbor Analysis (QGIS3) Sampling Raster Data using Points or Polygons (QGIS3) Calculating Raster Area (QGIS3) Creating Heatmaps (QGIS3) Animating Time Series Data (QGIS3) ...
Line, Polygon, QgsMapTip 图层地标提示。当鼠标在MapCanvas上移动时,MapTip被一个定时器驱动,这时MapTip将当前地图坐标作为中心点,围绕这个点产生一个选择区域(double searchRadius = mpMapCanvas->extent().width() * (QGis::DEFAULT_IDENTIFY_RADIUS / 100.0 );) ...
end_points:end_point, weight:length, output:/path/to/shortest_path.shp }) #清理QGIS应用环境 QgsApplication.exitQgis() 3.2代码解释代码解释 •初始化初始化QGIS环境环境:设置QGIS的路径并初始化QGIS应用,这是运行QGISPython脚本的必 要步骤。 •加载数据加载数据:使用QgsVectorLayer加载道路网络、起点和终点...
Finally why some functions require QgsPointXY while others QgsPoint, beats me, just above this one is lineCircleIntersection that requires the use of PointXY. My current workaround is to use segmentIntersection but that requires the calculation of dummy points so was looking for something more ...
Processing: "Raster pixels to points" algorithm Processing: Line substring algorithm Processing: "Interpolate point on line" algorithm Processing: k-neighbour concave hull Processing: Python scripts which implement algorithms now execute the algorithm on drag and drop and browser double-click Processing:...
Snap Points to Line Vertices in QGIS Use the ‘Snap geometries to layer’ Tool In this example we will snap the centroids layer to the Pipes layer with a tolerance of 0.1 meters. GMDFebruary 17, 2024QGIS0Read more > Change the Levels of Features in the same Layer in QGIS ...
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