topic Re: Raster cell size changing with new projection in ArcGIS Pro Questions https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384038#M16919 <HTML><HEAD></HEAD><BODY><P>You have used the wrong geoprocessing tool to project your raster. <EM>Define Projection</EM> is used to <SPAN style="text-decoration: underline;">assign</SPAN> the correct projection to an existing raster or feature layer. You usually use this when you have received a file generated from some other software that did not include a .prj file, or raster equivalent.&nbsp;</P><P></P><P>See&nbsp;<A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/define-projection.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/define-projection.htm">Define Projection—Data Management toolbox | Documentation</A>&nbsp;</P><P></P><P>You must use the <EM>Project Raster</EM> geoprocessing tool to project a raster to a new projection.&nbsp;</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm">Project Raster—Data Management toolbox | Documentation</A>&nbsp;</P></BODY></HTML> Mon, 27 Jul 2020 12:43:17 GMT MervynLotter 2020-07-27T12:43:17Z Raster cell size changing with new projection https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384037#M16918 <HTML><HEAD></HEAD><BODY><P>I have a high-resolution World View 2 satellite image with a cell size of 0.5 m. However the image is in a WGS84 coordinate system, so to get meter distance values instead of degrees I have converted it to a WGS84 / UTM projection.</P><P>The raster in WGS84 / UTM projection has a cell size of 0.35.<BR /><BR /></P><P>How can I convert the image into a WGS84 / UTM projection and maintain the 0.5 m cell size?</P><P>I am using ArcGIS Pro and converted the coordinate system from WGS84 to WGS84 / UTM using "raster project" tool.</P></BODY></HTML> Mon, 27 Jul 2020 10:51:23 GMT https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384037#M16918 tt1 2020-07-27T10:51:23Z Re: Raster cell size changing with new projection https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384038#M16919 <HTML><HEAD></HEAD><BODY><P>You have used the wrong geoprocessing tool to project your raster. <EM>Define Projection</EM> is used to <SPAN style="text-decoration: underline;">assign</SPAN> the correct projection to an existing raster or feature layer. You usually use this when you have received a file generated from some other software that did not include a .prj file, or raster equivalent.&nbsp;</P><P></P><P>See&nbsp;<A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/define-projection.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/define-projection.htm">Define Projection—Data Management toolbox | Documentation</A>&nbsp;</P><P></P><P>You must use the <EM>Project Raster</EM> geoprocessing tool to project a raster to a new projection.&nbsp;</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm">Project Raster—Data Management toolbox | Documentation</A>&nbsp;</P></BODY></HTML> Mon, 27 Jul 2020 12:43:17 GMT https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384038#M16919 MervynLotter 2020-07-27T12:43:17Z Re: Raster cell size changing with new projection https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384039#M16920 <HTML><HEAD></HEAD><BODY><P>Apologies, I did indeed use project raster. I confused the tool's name. Thanks for flagging.&nbsp;</P></BODY></HTML> Mon, 27 Jul 2020 12:46:35 GMT https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384039#M16920 tt1 2020-07-27T12:46:35Z Re: Raster cell size changing with new projection https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384040#M16921 <HTML><HEAD></HEAD><BODY><P>Have you tried an equal area projection? Not sure if this will solve the issue but it may be related to your choice in projection. Where in the world is your study area?&nbsp;&nbsp;</P></BODY></HTML> Mon, 27 Jul 2020 13:07:27 GMT https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384040#M16921 MervynLotter 2020-07-27T13:07:27Z Re: Raster cell size changing with new projection https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384041#M16922 <HTML><HEAD></HEAD><BODY><P>Projecting rasters has many considerations, one of which is the coordinates system</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/project-raster.htm">Project Raster—Data Management toolbox | Documentation</A>&nbsp;</P><P></P><P>But... Do not skip a read on Pro's cell size projection method.&nbsp; It is well worth the read.</P><P></P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/environment-settings/how-the-cell-size-projection-method-environment-setting-works.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/environment-settings/how-the-cell-size-projection-method-environment-setting-works.htm">How the Cell Size Projection Method environment setting works—Geoprocessing | Documentation</A>&nbsp;</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/environment-settings/cell-size-projection-method.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/environment-settings/cell-size-projection-method.htm">Cell Size Projection Method (Environment setting)—Geoprocessing | Documentation</A>&nbsp;</P></BODY></HTML> Mon, 27 Jul 2020 15:01:52 GMT https://community.esri.com/t5/arcgis-pro-questions/raster-cell-size-changing-with-new-projection/m-p/384041#M16922 DanPatterson 2020-07-27T15:01:52Z