topic Export raster to 8bit png with transparency in ArcMap in Data Management Questions https://community.esri.com/t5/data-management-questions/export-raster-to-8bit-png-with-transparency-in/m-p/97437#M5669 <HTML><HEAD></HEAD><BODY><P style="color: #242729; background-color: rgba(248, 248, 248, 0.6); border: 0px; margin: 0px 0px 1em;">I have various scanned images in different file formats (jpg, tiff, png) and I need to georeference, clip by polygons and export those images.</P><P style="color: #242729; background-color: rgba(248, 248, 248, 0.6); border: 0px; margin: 0px 0px 1em;">As a result I need to have a 8 bit png file with transparacy (the clipped areas) on colormap index value 255. I can set the NoData value during the clipping process but as a result I have an image with only 254 colors and a transparancy in ArcGIS (through symbology) but outside of my GIS environment the clipped areas appear as black 'borders'. Could someone describe a workflow where I get png files with 8 bit color depth and transparancy outside of GIS, saved on the index 255?</P></BODY></HTML> Thu, 03 May 2018 15:29:43 GMT D_Visca 2018-05-03T15:29:43Z Export raster to 8bit png with transparency in ArcMap https://community.esri.com/t5/data-management-questions/export-raster-to-8bit-png-with-transparency-in/m-p/97437#M5669 <HTML><HEAD></HEAD><BODY><P style="color: #242729; background-color: rgba(248, 248, 248, 0.6); border: 0px; margin: 0px 0px 1em;">I have various scanned images in different file formats (jpg, tiff, png) and I need to georeference, clip by polygons and export those images.</P><P style="color: #242729; background-color: rgba(248, 248, 248, 0.6); border: 0px; margin: 0px 0px 1em;">As a result I need to have a 8 bit png file with transparacy (the clipped areas) on colormap index value 255. I can set the NoData value during the clipping process but as a result I have an image with only 254 colors and a transparancy in ArcGIS (through symbology) but outside of my GIS environment the clipped areas appear as black 'borders'. Could someone describe a workflow where I get png files with 8 bit color depth and transparancy outside of GIS, saved on the index 255?</P></BODY></HTML> Thu, 03 May 2018 15:29:43 GMT https://community.esri.com/t5/data-management-questions/export-raster-to-8bit-png-with-transparency-in/m-p/97437#M5669 D_Visca 2018-05-03T15:29:43Z