def createdistancearea(self):
distancearea = QgsDistanceArea()
dest = self.canvas.mapSettings().destinationCrs()
distancearea.setSourceCrs(dest, QgsProject.instance().transformContext())
ellispoid = QgsProject.instance().readEntry("Measure", "/Ellipsoid", GEO_NONE)
distancearea.setEllipsoid(ellispoid[0])
return distancearea
def get_distance(pnt1, pnt2, epsg_code):
"""
:param pnt1: QgsPoint object
:param pnt2: QgsPoint object
:returns the distance between pnt1 and pnt2
"""
# Create a measure object
distance = QgsDistanceArea()
crs = QgsCoordinateReferenceSystem()
# Sets this CRS by lookup of the given PostGIS SRID in the CRS database.
crs.createFromSrid(epsg_code)
context = QgsProject.instance().transformContext()
distance.setSourceCrs(crs, context)
if epsg_code == constants.EPSG_WGS84:
distance.setEllipsoid("WGS84")
return distance.measureLine(pnt1, pnt2)