topic Re: How to revalue incorrect rasters? in Ocean Science Questions https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724340#M89 <HTML><HEAD></HEAD><BODY><P>Have you ruled out some of the 'focal' statistics that are available.&nbsp; Perhaps a focal majority with an appropriate window size and shape</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/focal-statistics.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/focal-statistics.htm">Focal Statistics—Help | ArcGIS Desktop</A>&nbsp;</P></BODY></HTML> Mon, 16 Dec 2019 15:12:05 GMT DanPatterson_Retired 2019-12-16T15:12:05Z How to revalue incorrect rasters? https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724339#M88 <HTML><HEAD></HEAD><BODY><P>I've attached an example raster image of sea ice concentrations that I am working with. In this case, only the blue and orange rasters are correct values. I'm curious if there is a way to do some sort of neighborhood analysis that will revalue rasters based on the values of their neighbors. For example if a black raster is in the center of a 3 x 3 grid and has 6 blue neighbors and 2 orange neighbors, I would like that middle raster to be blue. If black center raster has 5 orange neighbors and 3 blue, I would like it to be orange. For the purpose of getting an answer lets say 4 orange and 4 black neighbors would be orange. Any way of doing this? Thanks!</P><P></P><P>Sorry if this is in the wrong place, I'm new here and would take any suggestions for improvement</P><P></P><P><IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/476216_pastedImage_1.png" /></P></BODY></HTML> Mon, 16 Dec 2019 14:36:46 GMT https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724339#M88 LarsHammer 2019-12-16T14:36:46Z Re: How to revalue incorrect rasters? https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724340#M89 <HTML><HEAD></HEAD><BODY><P>Have you ruled out some of the 'focal' statistics that are available.&nbsp; Perhaps a focal majority with an appropriate window size and shape</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/focal-statistics.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/focal-statistics.htm">Focal Statistics—Help | ArcGIS Desktop</A>&nbsp;</P></BODY></HTML> Mon, 16 Dec 2019 15:12:05 GMT https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724340#M89 DanPatterson_Retired 2019-12-16T15:12:05Z Re: How to revalue incorrect rasters? https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724341#M90 <HTML><HEAD></HEAD><BODY><P>Thanks for the reply. I think I may have figured it out. First used 'set null' function to show black, grey, and white rasters as no data. Then used 'nibble' to revalue. It looks like it's doing what I want!</P></BODY></HTML> Mon, 16 Dec 2019 22:36:55 GMT https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724341#M90 LarsHammer 2019-12-16T22:36:55Z Re: How to revalue incorrect rasters? https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724342#M91 <HTML><HEAD></HEAD><BODY><P>Yes nibble would probably be best given a chosen focal window may not apply to all areas.</P><P>For people that aren't familiar with how it works, it is described here</P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/how-nibble-works.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/how-nibble-works.htm">How Nibble works—Help | ArcGIS Desktop</A>&nbsp;</P></BODY></HTML> Tue, 17 Dec 2019 02:00:26 GMT https://community.esri.com/t5/ocean-science-questions/how-to-revalue-incorrect-rasters/m-p/724342#M91 DanPatterson_Retired 2019-12-17T02:00:26Z