NumPyArrayToRaster with string array

Discussion created by rrasterr on Apr 3, 2012
Latest reply on Apr 3, 2012 by philmorefield
I am trying to use the NumPyArrayToRaster for a string array

I am using two input arrays: arcpy.RasterToNumPyArray(raster1) and arcpy.RasterToNumPyArray(raster2)
with dtype('uint8')

My output array is created from a loop that sums both input arrays in str format, something like: str(array1)+"+"+str(array2) with dtype='|S4'

When I try to export it to raster format I get the following error:
raceback (most recent call last):
  File "<pyshell#103>", line 1, in <module>
  File "C:\Program Files (x86)\ArcGIS\Desktop10.0\arcpy\arcpy\__init__.py", line 1165, in NumPyArrayToRaster
    return _NumPyArrayToRaster(*args, **kwargs)
ValueError: Argument in_array: Array type is not supported.

Is there any limitation of type of arrays we can export to raster format ??