I have found a bug with the "lines to polygon" tool of QGIS and would like to know if the bug is known and if there is a workaround? I want to convert my MultiLineString Z to MultiPolygon Z with Qgis inside a plugin. The results from the processor tool are different from the Pyth...
切换到编辑模式,增添Line,注意河流流向是从上游到下游。支流交汇处要设置节点,使用snapping toolbar链接两处的节点,形成汇流。设置12m为一个激活Snapping功能的范围。 View-->Toolbar -->Snapping toolbar Snapping Toolbar snapping toolbar 工作时状态 Digitize Lakes 类似地,添加polygon图层。如果有湖心岛,选择View-...
// 几何类型,"point", "linestring", "polygon", "multipoint","multilinestring","multipolygon" path.append( QString( "crs=EPSG:4326&")); //参照坐标系 path.append( QString( "field=id:integer&field=name:string(50)&")); //添加字段属性 path.append( QString( "index=yes&" )); // ...
//几何类型,"Point", "LineString", "Polygon", "MultiPoint", "MultiLineString", "MultiPolygon"QString path = "multiPoint" path.append( QString("crs=EPSG:4326&"));//参照坐标系path.append( QString("field=id:integer&field=name:string(50)&"));//添加字段属性path.append( QString("index=...
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...
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 operations¶ Advanced Raster Analysis (QGIS3) ...
But since I do not really need the ridgeline as a geometry with duplicate attributes, I wonder if I can add a symbol to the polygon layer that represents the ridgeline. Not sure how to go about this using the geometry of the layer to calculate the center line of the polygon to create ...
[SensorThings] Only Polygon geometry for entity type = MultiDatastreams Bug #59719 opened Dec 3, 2024 by lucagiovannini 1 of 2 tasks 4 3.40.0 crash to quit qgis Bug Crash/Data Corruption Feedback stale #59665 opened Nov 29, 2024 by Geoscope19 1 of 2 tasks 2 DB default value...
1.建表2.添加GIST索引 3.插入数据3.1 点(POINT) 或使用多点(MULTIPOINT)QGIS中显示几何如下: 3.2 线(LINESTRING) 或使用多线(MULTILINESTRING)QGIS中显示几何如下: 3.3 多边形(POLYGON) 或使用多边形集合(MULTIPOLYGON)QGIS中显示几何如下: 3.4 几何集合 ...
1.建表2.添加GIST索引3.插入数据3.1 点(POINT) 或使用多点(MULTIPOINT)QGIS中显示几何如下: 3.2线(LINESTRING) 或使用多线(MULTILINESTRING)QGIS中显示几何如下: 3.3多边形(POLYGON) 或使用多边形集合(MULTIPOLYGON)QGIS中显示几何如下: 3.4几何集合 QGIS实战系列之把点转换为面 ...