topic Standardize kernel density data? in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/standardize-kernel-density-data/m-p/561099#M8118 <HTML><HEAD></HEAD><BODY><SPAN>Hi there,</SPAN><BR /><BR /><SPAN>I have transect survey data with animal counts that I successfully calculated kernel density for.&nbsp; However, there are &gt;20 transects total, and in some areas (not all), multiple transects were conducted.&nbsp; Thus, the densities for these areas are inflated.&nbsp; I would like to standardize my data for number of transects conducted within a certain cell.&nbsp; </SPAN><BR /><BR /><SPAN>I have pondered this and tried a few things.&nbsp; First, I tried to extract the kernel density raster and join to the table with transect data.&nbsp; However, this doesn't work as my original table has &gt;18,000 points, and the raster extraction then tries to match to each point.&nbsp; Is there a way to extract kernel densities and match to the metadata (e.g., transect name)?&nbsp; I don't think so, given how kernels work...</SPAN><BR /><BR /><SPAN>My next thought was to calculate kernel densities for each individual transect (&gt;20), and then try to calculate mean density for all transects within cells.&nbsp; However, I got stuck with this, as the cell statistics only seem to allow input of two different rasters at a time.&nbsp; </SPAN><BR /><BR /><SPAN>I suppose I could calculate mean # animals/transect in advance, but each point is an individual location, and I would have to first bin the data into cells (say, 3-km), which I'm trying to avoid (unless anyone has advice on an easy way to do this!)...</SPAN><BR /><BR /><SPAN>Does anyone have any other ideas?</SPAN><BR /><BR /><SPAN>Thanks in advance...</SPAN></BODY></HTML> Mon, 13 Dec 2010 16:27:40 GMT ElizabethPhillips 2010-12-13T16:27:40Z Standardize kernel density data? https://community.esri.com/t5/arcgis-spatial-analyst-questions/standardize-kernel-density-data/m-p/561099#M8118 <HTML><HEAD></HEAD><BODY><SPAN>Hi there,</SPAN><BR /><BR /><SPAN>I have transect survey data with animal counts that I successfully calculated kernel density for.&nbsp; However, there are &gt;20 transects total, and in some areas (not all), multiple transects were conducted.&nbsp; Thus, the densities for these areas are inflated.&nbsp; I would like to standardize my data for number of transects conducted within a certain cell.&nbsp; </SPAN><BR /><BR /><SPAN>I have pondered this and tried a few things.&nbsp; First, I tried to extract the kernel density raster and join to the table with transect data.&nbsp; However, this doesn't work as my original table has &gt;18,000 points, and the raster extraction then tries to match to each point.&nbsp; Is there a way to extract kernel densities and match to the metadata (e.g., transect name)?&nbsp; I don't think so, given how kernels work...</SPAN><BR /><BR /><SPAN>My next thought was to calculate kernel densities for each individual transect (&gt;20), and then try to calculate mean density for all transects within cells.&nbsp; However, I got stuck with this, as the cell statistics only seem to allow input of two different rasters at a time.&nbsp; </SPAN><BR /><BR /><SPAN>I suppose I could calculate mean # animals/transect in advance, but each point is an individual location, and I would have to first bin the data into cells (say, 3-km), which I'm trying to avoid (unless anyone has advice on an easy way to do this!)...</SPAN><BR /><BR /><SPAN>Does anyone have any other ideas?</SPAN><BR /><BR /><SPAN>Thanks in advance...</SPAN></BODY></HTML> Mon, 13 Dec 2010 16:27:40 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/standardize-kernel-density-data/m-p/561099#M8118 ElizabethPhillips 2010-12-13T16:27:40Z Re: Standardize kernel density data? https://community.esri.com/t5/arcgis-spatial-analyst-questions/standardize-kernel-density-data/m-p/561100#M8119 <HTML><HEAD></HEAD><BODY><SPAN>Hi Elizabeth,</SPAN><BR /><BR /><SPAN>It has been a while since you posted your question.&nbsp; I am in a similar situation, with road mortality data on one road over 4 years but with different survey efforts in each of the four years of my data set.&nbsp; Did you figure out how to standardize kernel density layers?&nbsp; I would like to add my layers together to find the worst road mortality locations over the four years, but I do not want to bias those locations toward the years with more survey efforts.</SPAN></BODY></HTML> Thu, 18 Aug 2011 20:18:33 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/standardize-kernel-density-data/m-p/561100#M8119 LynGarrah 2011-08-18T20:18:33Z