Latest Contributions by DarrenWiens2

I suppose you know that even though no features overlap the data frame, the extent may overlap: ... View more

I'm not sure about the raster field type issue, but for handling different schemas through arcpy, look into the FieldMap and FieldMappings objects (in particular, see the examples on these pages to see how to use with the Merge tool). ... View more

Help me out here - where are you trying and failing to concatentate these fields? Line 62? As has been suggested in your other threads, use print statements to confirm that the values you think should be there, are there. You check that 'StreetType' is there, but you're referencing "StreetType_1" - perhaps check that that's there. ... View more

There are a few mistakes in the script above, which will make it tricky (impossible) for a beginning to figure out. Particularly, needs to be "math.radians()", and typo in newFc vs newFC, all of which is compounded by not using the 'with' statement, so sCursor never gets deleted and causes yet more problems. I guess the point is, sometimes the out-of-the-box tools are worth it. >>> import arcpy # import arcpy ... import math # import math ... fc = r'C:\junk\start_points.shp' # change to your existing input feature class ... new_fc = r'C:\junk\new_points.shp' # change to your existing output feature class ... fields = ['POINT_X', 'POINT_Y', 'DISTANCE','BEARING'] # existing fields in input ... outFields = ['SHAPE@','x', 'y', 'distance','bearing'] # existing fields in output ... iCursor = arcpy.da.InsertCursor(new_fc,outFields ) # insert cursor ... with arcpy.da.SearchCursor(fc, fields) as sCursor: # search cursor ...     for row in sCursor: # loop through rows in search cursor ...         inputX = row[0] # 1st field in search cursor ...         inputY = row[1] # 2nd field in search cursor ...         distance = row[2] # 3rd field in search cursor ...         bearing = row[3] # 4th field in search cursor ...         bearing = math.radians(float(bearing)) # convert to radians ...         newX = inputX + distance * math.cos(bearing) # calc new X ...         newY = inputY + distance * math.sin(bearing) # calc new Y ...         point = arcpy.Point(newX,newY) # create new point ...         temp = [point,newX,newY,distance,bearing] # organize new attributes ...         iCursor.insertRow(temp) # write new row ... del iCursor # delete insert cursor ... View more

You can do this all using out-of-the-box ArcGIS tools: 1.) You need a table containing the observation point coordinates, bearing, and distance. If you need to add coordinates, use Add XY Coordinates tool. 2.) Run Bearing Distance to Line​ 3.) Use Add Geometry Attributes to calculate the END_X and END_Y coordinates 4.) Make XY Event Layer using the END_X and END_Y coordinates 5.) Export the event layer to a feature class on disk ... View more

Have you set the workspace environment? That is a necessary step 1. Refer to help here. ... View more

Is the issue that you don't trust the building footprints (i.e. you want to re-delineate the buildings)? If not, you shouldn't have to do much with the "LiDAR" side of things, and you can move on subtracting the DSM and DTM rasters in conjunction with Extract by Mask​ (requires Spatial Analyst). ... View more

The 'r' indicates raw string notation (see here). It says that the following string is not to be escaped by backslashes. In your example, '\t' is interpreted as 'tab' (see here for a list of escape sequences). ... View more

As far as I know, there is no single tool that will collapse records into the largest polygon (keeping only and all the attributes of the largest polygon), but you can do something along these lines: 1.) Move your data to a personal GDB feature class (supports MAX in SQL) 2.) Select the MAX area record for each group (e.g. senate district). Change myFeatureClass to the name of your feature class: [Shape_Area_1] IN (SELECT MAX( [Shape_Area_1]) FROM myFeatureClass GROUP BY [ADMIN3]) 3.) Export those selected records 4.) Dissolve the shapes of each group together (e.g. by ADMIN3) 5.) Join the exported max records to the dissolved shapes based on ADMIN3 ... View more

What data type is the "StreetType" field? And, if you add 'print row[4]' before attempting to change the value, what is the suspicious value just before throwing the error? ... View more