topic Inconsistent results from SetNull in Python Questions https://community.esri.com/t5/python-questions/inconsistent-results-from-setnull/m-p/471280#M36770 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>I get different results from a SetNull operation when I run it in a python script compared to a python toolbox.&nbsp; The inputs are exactly the same and the scripts are the same except one has been converted into a python toolbox.</P><P></P><P>My input is a raster made up of ones and zeros, I then use SetNull to set the zeros to nulls - I then use RasterToPolygon so I get a shape where all the ones were.</P><P></P><P>In the python script this runs correctly.</P><P>However, in the python toolbox the output of the SetNull initially looks correct but if I go into symbology and turn on 'all other values' I can see that instead of nulls the zeros are either still zero or have value= -128.&nbsp; This means that when the RasterToPolygon runs I get unwanted shapes which screws up the rest of the script.</P><P></P><P>So my question is - Has anyone else experienced anything like this, is it likely to be a bug in the tool, or could it be my scripting error?</P></BODY></HTML> Wed, 23 Mar 2016 15:48:21 GMT BenLeslie1 2016-03-23T15:48:21Z Inconsistent results from SetNull https://community.esri.com/t5/python-questions/inconsistent-results-from-setnull/m-p/471280#M36770 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>I get different results from a SetNull operation when I run it in a python script compared to a python toolbox.&nbsp; The inputs are exactly the same and the scripts are the same except one has been converted into a python toolbox.</P><P></P><P>My input is a raster made up of ones and zeros, I then use SetNull to set the zeros to nulls - I then use RasterToPolygon so I get a shape where all the ones were.</P><P></P><P>In the python script this runs correctly.</P><P>However, in the python toolbox the output of the SetNull initially looks correct but if I go into symbology and turn on 'all other values' I can see that instead of nulls the zeros are either still zero or have value= -128.&nbsp; This means that when the RasterToPolygon runs I get unwanted shapes which screws up the rest of the script.</P><P></P><P>So my question is - Has anyone else experienced anything like this, is it likely to be a bug in the tool, or could it be my scripting error?</P></BODY></HTML> Wed, 23 Mar 2016 15:48:21 GMT https://community.esri.com/t5/python-questions/inconsistent-results-from-setnull/m-p/471280#M36770 BenLeslie1 2016-03-23T15:48:21Z Re: Inconsistent results from SetNull https://community.esri.com/t5/python-questions/inconsistent-results-from-setnull/m-p/471281#M36771 <HTML><HEAD></HEAD><BODY><P>can you confirm if you raster is an integer array since equality checks get a bit iffy if one is relying on the visual classification of the raster rather than the histogram or explicitly converting to integer using ... int ...&nbsp; An of course cell size, extent and snap raster need to be explicitly set when doing these assessments.</P></BODY></HTML> Sat, 26 Mar 2016 02:13:02 GMT https://community.esri.com/t5/python-questions/inconsistent-results-from-setnull/m-p/471281#M36771 DanPatterson_Retired 2016-03-26T02:13:02Z