Contour lines are lines that connect points of equal elevation on a map, allowing the terrain’s relief to be visualized. A DEM (Digital Elevation Model) is a raster representation of the terrain relief. In this tutorial, you will learn how to import and generate contour lines from a DEM ...
Processing: Points to lines processing algorithm Application and Project Options: Hidden layers Application and Project Options: Custom "Full Extent" definition Application and Project Options: Toggle network caching to QgsNetworkAccessManager Browser: Unify ArcGis Feature Service and ArcGIS Map Service con...
void MainWindow::addDxfSlot() { QString filename = QStringLiteral("maps/points_lines_3d.dxf"); QFileInfo ff(filename); //创建图层 QgsVectorLayer* points_gpkgLayer = new QgsVectorLayer(QString("%1%2").arg(filename).arg("|layername=entities|geometrytype=LineString"),"entities1","ogr...
So far, the default style for the trajectory points is hard-coded to apply the Turbo color ramp on the speed column with values from 0 to 50 (since I’m simply loading a ready-made QML). By default, the speed is calculated as km/h but that can be customized: I don’t have a so...
AndArcGIS Model Builderis the most intuitive, rock-solid, pragmatic way to automate geoprocessing jobs. You string together sets of tools in Model Builder to automate processes. It has iterators to do “for” and “while” loops. Drop tools in your Model Builder Diagram and connect them. It...
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Different authentication methods are used in the application that helps to secure the data inside the application itself. Hence, when we connect to a database, authentication is required that helps to save the data for specific users and to establish connection in a safe manner. Several plugins ...
Connecting QGIS to ReachFirst of all, we need to connect survey equipment to QGIS. There are two simple ways. One, over local network, or second by USB.tip To configure the connection in QGIS, you might need to enable the GPS Information panel first. Go to the View list in the ...
self.action.triggered.connect(self.run) self.iface.addToolBarIcon(self.action) self.iface.addPluginToMenu(self.menu,self.action) defunload(self): self.iface.removePluginMenu(self.menu,self.action) self.iface.removeToolBarIcon(self.action) ...
Connect QGIS to oracle spatial – Quantum GIS Download and Install quantum GIS – QGIS with oracle connectivity This list will continuously updated as the number of articles for tutorial would be published. If you are an expert in QGIS please consider contributing a tutorial article for same here...