topic Re: Raster bilinear resampling problem in Data Management Questions https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383877#M21982 <HTML><HEAD></HEAD><BODY><SPAN>Hi Craig,</SPAN><BR /><BR /><SPAN>Bilinear resampling usually works well when you are creating a more coarse resolution from a higher resolution. You are doing the opposite at a quite large difference (200m vs. 30m). Please try using the </SPAN><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000009t000000.htm">cubic convolution resampling method</A><SPAN> which might help. </SPAN><BR /><SPAN>Note here that you might be merging two concepts: one is a resampling used to create the new pixels, the other is a display resampling mechanism. The geoprocessing tool you run will still create square pixels and when you zoom in you will see square pixels if your display resampling is nearest neighbor. So, in addition you can change the display resampling to bilinear which might give you a display that you are looking for.</SPAN><BR /><SPAN>I hope this helps.</SPAN><BR /><BR /><SPAN>Robert</SPAN></BODY></HTML> Wed, 13 Apr 2011 15:26:44 GMT RobertBerger 2011-04-13T15:26:44Z Raster bilinear resampling problem https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383874#M21979 <HTML><HEAD></HEAD><BODY><SPAN>Hi everyone,</SPAN><BR /><SPAN>I have an forest fire intensity asci file with 200m resolution which i need to be smoother and at 30m resolution. i convert the asci to raster then resample to 30m using a bilinear interpolation, but the resulting raster doesn't make any sense. what am i doing wrong?</SPAN><BR /><SPAN>here is the original asci file if anyone wants to try for themselves...</SPAN><BR /><BR /><A href="http://www.2shared.com/file/Rr619-lV/305_1_Intensity.html">http://www.2shared.com/file/Rr619-lV/305_1_Intensity.html</A><BR /><BR /><SPAN>i am using arcgis 9.3, please help!!</SPAN><BR /><BR /><SPAN>thanks,</SPAN><BR /><SPAN>craig :cool:</SPAN></BODY></HTML> Fri, 11 Feb 2011 01:28:39 GMT https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383874#M21979 CraigMason 2011-02-11T01:28:39Z Re: Raster bilinear resampling problem https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383875#M21980 <HTML><HEAD></HEAD><BODY><SPAN>What do you mean by this?</SPAN><BR /><BR /><BLOCKQUOTE class="jive-quote"><BR />the resulting raster doesn't make any sense.<BR /></BLOCKQUOTE><BR /><BR /><SPAN>How does the output not make sense?&nbsp; Any details you can provide would be useful.</SPAN></BODY></HTML> Tue, 15 Feb 2011 12:00:29 GMT https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383875#M21980 PatrickTaurman 2011-02-15T12:00:29Z Re: Raster bilinear resampling problem https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383876#M21981 <HTML><HEAD></HEAD><BODY><SPAN>What I mean by not making sense is:</SPAN><BR /><SPAN>Here is the raster intensity before interpolation (cell size 200m)</SPAN><BR /><BR /><A href="http://i83.photobucket.com/albums/j316/craigusmcvegas/rasterbeforeinterpolation.jpg">http://i83.photobucket.com/albums/j316/craigusmcvegas/rasterbeforeinterpolation.jpg</A><BR /><BR /><SPAN>And here is the raster after resampling at 30m using bilinear interpolation</SPAN><BR /><BR /><A href="http://i83.photobucket.com/albums/j316/craigusmcvegas/rasterafterinterpolation.jpg">http://i83.photobucket.com/albums/j316/craigusmcvegas/rasterafterinterpolation.jpg</A><BR /><BR /><SPAN>As you can see, it has not smoothed the raster at all but made a funky pattern...</SPAN><BR /><BR /><SPAN>Still havent solved this problem...</SPAN></BODY></HTML> Wed, 13 Apr 2011 02:43:26 GMT https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383876#M21981 CraigMason 2011-04-13T02:43:26Z Re: Raster bilinear resampling problem https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383877#M21982 <HTML><HEAD></HEAD><BODY><SPAN>Hi Craig,</SPAN><BR /><BR /><SPAN>Bilinear resampling usually works well when you are creating a more coarse resolution from a higher resolution. You are doing the opposite at a quite large difference (200m vs. 30m). Please try using the </SPAN><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000009t000000.htm">cubic convolution resampling method</A><SPAN> which might help. </SPAN><BR /><SPAN>Note here that you might be merging two concepts: one is a resampling used to create the new pixels, the other is a display resampling mechanism. The geoprocessing tool you run will still create square pixels and when you zoom in you will see square pixels if your display resampling is nearest neighbor. So, in addition you can change the display resampling to bilinear which might give you a display that you are looking for.</SPAN><BR /><SPAN>I hope this helps.</SPAN><BR /><BR /><SPAN>Robert</SPAN></BODY></HTML> Wed, 13 Apr 2011 15:26:44 GMT https://community.esri.com/t5/data-management-questions/raster-bilinear-resampling-problem/m-p/383877#M21982 RobertBerger 2011-04-13T15:26:44Z