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...
可以都试试，目前QGIS3.30可以直接导入xlsx格式的Excel了，Spreadsheet Layers这个插件也是极好的 ...
We will be importing a text file with earthquake locations in the tab-separated values (TSV) format to QGIS and create a points layer.取得資料 For this tutorial we will download a dataset of earthquakes between 1900-2000 from NOAA’s National Geophysical Data Center produces a great dataset of...
The old “Trajectories from point layer”, “Add heading to points”, and “Add speed (m/s) to points” algorithms have been superseded by the new“Create trajectories”algorithm which automatically computes speeds and headings when creating the trajectory outputs. “Day trajectories from point lay...
Qgis - How to link data from a CSV table to a shapefile, Open the csv file as text layer Join those two by the unique identifier they share (like an ID) Create a new field in the attribute table for a value you would like to join Fill that field with the existing data … ...
We will be importing a text file with earthquake locations in the tab-separated values (TSV) format to QGIS and create a points layer. Get the data¶ For this tutorial we will download a dataset of earthquakes between 1900-2000 from NOAA’s National Geophysical Data Center produces a great...
Join attributes from CSV layer Merge layers to create a new output Spatial join that joins attributes based on location (Intersect, within, contains) 3. Create As the name implies, this set of tools allows you to build derived datasets based on an input or a collection of inputs. Here are...
Create Grid LayerOne-Mile Grid over Manhattan The Grid tool creates a layer containing a grid of shapes.ParametersCreate Grid Form Geometry Type: Lines: Creates separate horizontal and vertical lines for each grid cell Rectangles: Creates separate rectangles for each grid cell Points: Creates ...
Is is actually exact the same issue as https://github.com/qgis/QGIS/issues/34170 : Ogr shows all, attributes shown ok, it is just QGIS that is not showing the points. I'll try to debug the current db, and I've asked the people to create a test db (which hopefully then has the...
Creating Geometries: Create new geometrical features like points, lines, and polygons. from qgis.core import QgsPoint, QgsFeature, QgsGeometry point = QgsGeometry.fromPointXY(QgsPoint(10.0, 10.0)) Running Processing Algorithms: Automate spatial analysis by running processing tools. ...