得到的结果如图所示,但是线是整体的。需要【用线分割】功能,split lines with lines 分割前的线,要素总数1 分割后的线,要素总数44 4、去除杂线 新建一个字段cd计算出长度,按长度排序进行选择杂线,再剔除 或者是人手工筛选删除 5、再次合并线 去除杂线之后骨干线也是分段的,可以看出【红】和【黄】两种颜色,说...
When click the "Aceptar" button add the new polygon. This is the run() method: def run(self): self.dlg.cmb_TOC.clear() self.dlg.input_ln.clear() layers = self.iface.legendInterface().layers() layer_list = [] for layer in layers: layerType = layer.type() if layerType == QgsM...
“Clip trajectories by extent”still exists but, additionally, we can now also“Clip trajectories by polygon layer” There are two new event extraction algorithms to“Extract OD points”and“Extract OD points”, as well as the related“Split trajectories at stops”. Additionally, we can also“Sp...
QGIS 3.2.1works well for creating interactive maps, using good set of tools and symbology its become easy to implement. In the previous post we learn how toopen and view vector data. So, today we are Creating a Basic Map – QGIS. For creating basic map we work with the vector data.Ve...
The map frame now contains the ability to show the extents of another map and will update when moved. Using this with the atlas generation feature now core in the composer allows for some slick map generation. Overview frame style uses the same styling as a normal map polygon object so your...
def testReprojectionErrorsWhileRendering(self): # WKT of a polygon which causes reprojection errors while rendering # (apologies for the ridiculously complex wkt, but I can't find a way to reproduce with simplifiction) wkt = 'MultiPolygon (((16.93392988400009358 42.77094147300012...
The map frame now contains the ability to show the extents of another map and will update when moved. Using this with the atlas generation feature now core in the composer allows for some slick map generation. Overview frame style uses the same styling as a normal map polygon object so your...
self.dem_values))) # clipped with polygon layer if self.clip_geometry: z_func = lambda x, y: 0 transform_func = lambda x, y, z: mapTo3d.transform(x, y, z) geom = PolygonGeometry.fromQgsGeometry(self.clip_geometry, z_func, transform_func) geom.splitPolygon( writer.triangleMesh...
QGIS 1.8 polygon define edge length Draw polygons in QGIS and interactively define the length of the edges by keyboard input. QGIS lesson 26 – Splitting a polygon with lines from another layer In this lesson I will show you how to split a polygon into several polygons using lines from ano...
Python QgsFeature.id - 47 examples found. These are the top rated real world Python examples of qgis.core.QgsFeature.id extracted from open source projects. You can rate examples to help us improve the quality of examples.