topic Kernel density questions in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/kernel-density-questions/m-p/633339#M9191 <HTML><HEAD></HEAD><BODY><SPAN>I'm trying to do some kernel density estimates for a population of animals.&nbsp; The ecological literature is rife with examples of people doing this using the Animal Movement extension, but this is no longer available with modern versions of ArcInfo.&nbsp; </SPAN><BR /><BR /><SPAN>I have been running into a couple of problems.&nbsp; First, I need to figure out how to control the bandwidth.&nbsp; I need to use the Least Squares cross-validation (LSCV) method, but moreover I need to be sure how to specify bandwidth to begin with.&nbsp; Based on the the spatial analyst documentation I am assuming that search radius is synonamous with bandwidth here (since it directly affects smoothing of the resulting kernels)?&nbsp; Anyone have any experience implementing LSCV?</SPAN><BR /><BR /><SPAN>The extent of the region showing the density estimate contours also cuts off right at the edges of data I'm working with.&nbsp; Any idead on how to get it to display/calculate the whole kernel?</SPAN><BR /><BR /><SPAN>Finally, I need to calculate area based on the 95% density estimate I create here but the raster created seems to have a continuous distribution contained in it and the display varries based on what catagories I request.&nbsp; Again ... help!</SPAN><BR /><BR /><SPAN>I'm open to all suggestions.</SPAN><BR /><BR /><BR /><SPAN>Matt</SPAN></BODY></HTML> Mon, 30 Aug 2010 20:18:11 GMT MatthewWalters 2010-08-30T20:18:11Z Kernel density questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/kernel-density-questions/m-p/633339#M9191 <HTML><HEAD></HEAD><BODY><SPAN>I'm trying to do some kernel density estimates for a population of animals.&nbsp; The ecological literature is rife with examples of people doing this using the Animal Movement extension, but this is no longer available with modern versions of ArcInfo.&nbsp; </SPAN><BR /><BR /><SPAN>I have been running into a couple of problems.&nbsp; First, I need to figure out how to control the bandwidth.&nbsp; I need to use the Least Squares cross-validation (LSCV) method, but moreover I need to be sure how to specify bandwidth to begin with.&nbsp; Based on the the spatial analyst documentation I am assuming that search radius is synonamous with bandwidth here (since it directly affects smoothing of the resulting kernels)?&nbsp; Anyone have any experience implementing LSCV?</SPAN><BR /><BR /><SPAN>The extent of the region showing the density estimate contours also cuts off right at the edges of data I'm working with.&nbsp; Any idead on how to get it to display/calculate the whole kernel?</SPAN><BR /><BR /><SPAN>Finally, I need to calculate area based on the 95% density estimate I create here but the raster created seems to have a continuous distribution contained in it and the display varries based on what catagories I request.&nbsp; Again ... help!</SPAN><BR /><BR /><SPAN>I'm open to all suggestions.</SPAN><BR /><BR /><BR /><SPAN>Matt</SPAN></BODY></HTML> Mon, 30 Aug 2010 20:18:11 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/kernel-density-questions/m-p/633339#M9191 MatthewWalters 2010-08-30T20:18:11Z Re: Kernel density questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/kernel-density-questions/m-p/633340#M9192 <HTML><HEAD></HEAD><BODY><SPAN>This doesn't provide a straight forward answer to your questions but I found this application from previous forum discussions: </SPAN><A href="http://filebox.vt.edu/users/plaver/abode/home.html">http://filebox.vt.edu/users/plaver/abode/home.html</A><BR /><BR /><SPAN>The user manual seems to go into some detail.</SPAN><BR /><BR /><SPAN>Check it out. I haven't used it yet myself. Let me know what you think.</SPAN><BR /><SPAN>Colin</SPAN></BODY></HTML> Mon, 28 Mar 2011 20:31:11 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/kernel-density-questions/m-p/633340#M9192 ColinMurray 2011-03-28T20:31:11Z