josephholler
commented
3 years ago My best guess is to try increasing your short MAX_DIST of 100 (meters).
I'm speculating... I haven't seen that particular error message before. This algorithm is creating a point cloud out of road network vertices within your MAX_DIST threshold, and then using a TIN interpolation to create a raster surface from those points. I've seen the TIN algorithm part of this fail in a case where the MAX_DIST was short and the points were all arranged on a straight line, so it failed to create any Delaunay Triangles with them. You could test this by using the Pointcloud version of the algorithm to see if you get any result. If you do get a result, try running the TIN Interpolation algorithm using your pointcloud as the input layer to see if that's where the issue is.
Input params; { 'CELL_SIZE' : 10, 'DEFAULT_DIRECTION' : 2, 'DEFAULT_SPEED' : 5, 'DIRECTION_FIELD' : '', 'ENTRY_COST_CALCULATION_METHOD' : 0, 'INPUT' : 'DIR/roadnetwork_utm44.shp|layername=roadnetwork_utm44', 'INTERVAL' : 50, 'MAX_DIST' : 100, 'OUTPUT_CONTOURS' : 'TEMPORARY_OUTPUT', 'OUTPUT_INTERPOLATION' : 'TEMPORARY_OUTPUT', 'SPEED_FIELD' : '', 'START_POINT' : '925206.685237,3066640.398371 [EPSG:24344]', 'STRATEGY' : 0, 'TOLERANCE' : 0, 'VALUE_BACKWARD' : '', 'VALUE_BOTH' : '', 'VALUE_FORWARD' : '' }
(Using a network in Nepal - and starting point in same projection).
Any idea what I can do to fix this error? Thanks