Con is empty - no result in python but in Map Algebra

JohannesBierer — Mon, 14 Jun 2021 12:28:47 GMT

Hello,

I've problems with a Con command. In python there is only a empty result (no error message), but if I use Map Algebra - raster calculator in ArcMaP there is a result? Version ArcGIS Desktop 10.6.1

What's wrong with the Con :

OutRas = Con((outClip > value2) & (outClip < value), outClip)

value2 is 0.1 m less than value in a dgm. For example Value: 907.1346 m und Value2: 907.0346 m

Any ideas? It's in line 64?

def ExpandSperren_1(self, outFC): myList = list() # outFC = Sperren_3D outLyr = "outLyr" arcpy.MakeFeatureLayer_management(outFC, outLyr) arcpy.AddField_management(outLyr, "POINT_Z_1", "DOUBLE") # , 10, 4) with arcpy.da.UpdateCursor(outLyr, ["POINT_Z", "POINT_Z_1"]) as cursor: for r in cursor: value = round(r[0], 4) print value r[1] = value cursor.updateRow(r) d = {} for r in arcpy.da.SearchCursor(outLyr, ["ORIG_FID", "POINT_Z_1"]): print r[0] d[r[0]] = r[1] for key, value in d.iteritems(): # print value sel = "{} = {}".format("ORIG_FID", key) print sel arcpy.SelectLayerByAttribute_management(outLyr, "NEW_SELECTION", sel) result = arcpy.GetCount_management(outLyr) count = int(result.getOutput(0)) print("Count is {}".format(count)) value2 = value - 0.1 print "Value: {} und Value2: {}".format(value, value2) # Select Basin BasinLyr = "BasinLyr" arcpy.MakeFeatureLayer_management(self.outBasin, BasinLyr) arcpy.SelectLayerByLocation_management(BasinLyr, 'intersect', outLyr) strR = round(value, 4) print strR ReplaceRstrR = str(strR).replace(".", "_") outClip = "clip_{}".format(ReplaceRstrR) arcpy.Clip_management("SperrenDGM", "", outClip, BasinLyr, "#", "ClippingGeometry", "NO_MAINTAIN_EXTENT") arcpy.CheckOutExtension("Spatial") OutRas = Con((outClip > value2) & (outClip < value), outClip) OutRas.save("OutRas_{}".format(ReplaceRstrR)) outFlood = value - OutRas outFlutung = Con(outFlood > 0, outFlood) outPut = "Zwischen_Height_{}".format(ReplaceRstrR) outFlutung.save(outPut) myList.append(outPut) self.outFLRaster = "AAA_FlHoehe_Gesamt_Kaltenbronn" arcpy.MosaicToNewRaster_management(myList, arcpy.env.workspace, \ self.outFLRaster, "",\ "32_BIT_FLOAT", "1", "1", "LAST","FIRST") arcpy.CheckInExtension("Spatial")

Re: Con is empty - no result in python but in Map Algebra

DavidPike — Mon, 14 Jun 2021 13:53:29 GMT

I believe you'd have to cast outClip into a Raster object to use that map algebra syntax i.e. arcpy.Raster(outClip)

OutRas = Con((arcpy.Raster(outClip) > value2) & (arcpy.Raster(outClip) < value), outClip)

Re: Con is empty - no result in python but in Map Algebra

JohannesBierer — Mon, 14 Jun 2021 14:01:27 GMT

Thank you David, that worked!

topic Re: Con is empty - no result in python but in Map Algebra in ArcGIS Spatial Analyst Questions

Con is empty - no result in python but in Map Algebra

Re: Con is empty - no result in python but in Map Algebra

Re: Con is empty - no result in python but in Map Algebra