https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102222#M11471 <P>I am using ArcGIS Pro 2.8.3.&nbsp; I have a raster with just 2 values: 1 and 2.&nbsp; There are 93,878,957 pixels of value 1 and 106,250,349 pixels of value 2.&nbsp; When I run the reclassify geoprocessing tool to convert value 1 to 0 and value 2 to 1, I end up with 120,808,871 pixels of value 0 and 158,563,049 pixels of value 1.&nbsp; Why does my pixel count change?</P><P>I have set the environments for snap, mask, projection and cell size to my input raster.&nbsp; (I also ran reclassify with no environments set, but the pixel count still changed.)&nbsp; The raster properties of both my input and output layers match in terms of cell size, extent, number of rows and columns.&nbsp;&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_0-1632764439188.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23921i94D47FC351F3C5FC/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_0-1632764439188.png" alt="LawlorBridget_0-1632764439188.png" /></span></P><P>Source raster:</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_1-1632764502400.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23922i363012257310F45C/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_1-1632764502400.png" alt="LawlorBridget_1-1632764502400.png" /></span></P><P>Output after reclassify:</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_2-1632764545024.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23923i44FE836F987F3554/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_2-1632764545024.png" alt="LawlorBridget_2-1632764545024.png" /></span></P><P>Does anyone know why the pixel counts change after running reclassify?&nbsp; Thank you</P> Mon, 27 Sep 2021 17:45:18 GMT LawlorBridget 2021-09-27T17:45:18Z https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102222#M11471 <P>I am using ArcGIS Pro 2.8.3.&nbsp; I have a raster with just 2 values: 1 and 2.&nbsp; There are 93,878,957 pixels of value 1 and 106,250,349 pixels of value 2.&nbsp; When I run the reclassify geoprocessing tool to convert value 1 to 0 and value 2 to 1, I end up with 120,808,871 pixels of value 0 and 158,563,049 pixels of value 1.&nbsp; Why does my pixel count change?</P><P>I have set the environments for snap, mask, projection and cell size to my input raster.&nbsp; (I also ran reclassify with no environments set, but the pixel count still changed.)&nbsp; The raster properties of both my input and output layers match in terms of cell size, extent, number of rows and columns.&nbsp;&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_0-1632764439188.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23921i94D47FC351F3C5FC/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_0-1632764439188.png" alt="LawlorBridget_0-1632764439188.png" /></span></P><P>Source raster:</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_1-1632764502400.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23922i363012257310F45C/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_1-1632764502400.png" alt="LawlorBridget_1-1632764502400.png" /></span></P><P>Output after reclassify:</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LawlorBridget_2-1632764545024.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/23923i44FE836F987F3554/image-size/medium?v=v2&amp;px=400" role="button" title="LawlorBridget_2-1632764545024.png" alt="LawlorBridget_2-1632764545024.png" /></span></P><P>Does anyone know why the pixel counts change after running reclassify?&nbsp; Thank you</P> Mon, 27 Sep 2021 17:45:18 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102222#M11471 LawlorBridget 2021-09-27T17:45:18Z https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102228#M11472 <P>I might rebuild the raster attribute table and calculate statistics on the original just to check.</P> Mon, 27 Sep 2021 17:55:40 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102228#M11472 DavidPike 2021-09-27T17:55:40Z https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102232#M11473 <P>Thank you David.&nbsp; That worked and my source raster now has the same number of pixels in the attribute table as my reclassify raster.</P> Mon, 27 Sep 2021 18:07:28 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/reclassify-changes-pixel-count/m-p/1102232#M11473 LawlorBridget 2021-09-27T18:07:28Z