Gradient Vectors from Surface shapes_grid ParameterRaster|SURFACE|Surface|False ParameterNumber|STEP|Step|None|None|1 ParameterNumber|SIZE_MIN|Size Range Min|None|None|25.0 ParameterNumber|SIZE_MAX|Size Range Max|None|None|100.0 ParameterSelection|AGGR|Aggregation|[0] nearest neighbour;[1] mean value ParameterSelection|STYLE|Style|[0] simple line;[1] arrow;[2] arrow (centered to cell) OutputVector|VECTORS|Gradient Vectors