topic OLS &amp;amp; GWR for Raster in Spatial Statistics Questions https://community.esri.com/t5/spatial-statistics-questions/ols-amp-amp-gwr-for-raster/m-p/721287#M2282 <HTML><HEAD></HEAD><BODY><SPAN>Hi there,</SPAN><BR /><BR /><SPAN>I wonder how can I use OLS (Ordinary least squares) &amp; GWR (geographic weighted regression). I am interested to analyse the fire density (dependent variable) with elevation (independent variable) in my study area. My hypothesis is elevation is a determining factor in forest fires. My data is 250 m resolution. </SPAN><BR /><BR /><SPAN>Finding no way to use raster data in OLS &amp; GWR, I converted it to point shapefiles (millions of data points). I took a sample of it about 600000 data points &amp; run OLS &amp; GWR analysis. It worked but takes a lot of computational time. I am not sure if point shapefiles are appropriate format particularly for GWR.</SPAN><BR /><BR /><SPAN>Is there any suggestion that given the size and format (raster) of my data how can I efficiently run OLS &amp; GWR. </SPAN><BR /><BR /><SPAN>Many thanks.</SPAN><BR /><SPAN>Muhammad</SPAN></BODY></HTML> Sun, 11 Dec 2011 01:53:06 GMT Muhammad_WaseemAshiq 2011-12-11T01:53:06Z OLS &amp; GWR for Raster https://community.esri.com/t5/spatial-statistics-questions/ols-amp-amp-gwr-for-raster/m-p/721287#M2282 <HTML><HEAD></HEAD><BODY><SPAN>Hi there,</SPAN><BR /><BR /><SPAN>I wonder how can I use OLS (Ordinary least squares) &amp; GWR (geographic weighted regression). I am interested to analyse the fire density (dependent variable) with elevation (independent variable) in my study area. My hypothesis is elevation is a determining factor in forest fires. My data is 250 m resolution. </SPAN><BR /><BR /><SPAN>Finding no way to use raster data in OLS &amp; GWR, I converted it to point shapefiles (millions of data points). I took a sample of it about 600000 data points &amp; run OLS &amp; GWR analysis. It worked but takes a lot of computational time. I am not sure if point shapefiles are appropriate format particularly for GWR.</SPAN><BR /><BR /><SPAN>Is there any suggestion that given the size and format (raster) of my data how can I efficiently run OLS &amp; GWR. </SPAN><BR /><BR /><SPAN>Many thanks.</SPAN><BR /><SPAN>Muhammad</SPAN></BODY></HTML> Sun, 11 Dec 2011 01:53:06 GMT https://community.esri.com/t5/spatial-statistics-questions/ols-amp-amp-gwr-for-raster/m-p/721287#M2282 Muhammad_WaseemAshiq 2011-12-11T01:53:06Z