//test that measuring an empty polygon doesn't crashmeasurePolygon 示例3: addPoint ▲点赞 5▼ voidQgsMeasureDialog::addPoint( QgsPoint &point ) { QSettings settings;intdecimalPlaces = settings.value("/qgis/measure/decimalplaces","3").toInt();// Create QgsDistance Area for customization Pro...
# 需要导入模块: from qgis.core import QgsDistanceArea [as 别名]# 或者: from qgis.core.QgsDistanceArea importmeasureArea[as 别名]deftestMeasureMultiPolygon(self):# +-+-+ +-+-+# | | | |# + +-+ +-+ +# | | | |# +-+ +-+polygon = QgsGeometry.fromMultiPolygon( [ [[QgsPoint(0...
idx1 =-1idx2 =-1fields = layer.pendingFields()ifgeometryType == QGis.Polygon: (idx1, fields) = vector.findOrCreateField(layer, fields,'area',21,6) (idx2, fields) = vector.findOrCreateField(layer, fields,'perimeter',21,6)elifgeometryType == QGis.Line: (idx1, fields) = vector....
QSettings settings;intdecimalPlaces = settings.value("/qgis/measure/decimalplaces","3").toInt();// Create QgsDistance Area for customization ProjectionEnabled settingQgsDistanceArea myDa; configureDistanceArea( myDa );// show current distance/area while moving the point// by creating a temporary ...
In the Quantum Geographical Information System (QGIS 3.4.8, QGIS Development Team, Raleigh, NC, USA), 40 virtual ground control points (GCPs) were created by selecting edges of the plot polygons, which were distributed over the experimental area. The plot polygons were sourced from the plot ...