topic Bug in Spatial Analyst - Block Statistics, Aggregate in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/bug-in-spatial-analyst-block-statistics-aggregate/m-p/95948#M1338 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><BR /><SPAN>I would need some help with the following issue, which is maybe a bug in the block statistics tool, in ArcMap 10.0 (sp5).</SPAN><BR /><SPAN>I am trying to compute the median using the block statistics tool over an integer-type raster at 30m resolution (Fig. 1), for the entire State of Florida. The median is computed in my case using a rectangle (square) neighborhood of 67 x 67 cells, so that it matches the desired output block I need which is 2010m (30m x 67 = 2010m). However, in output, differently from block statistics mean or standard deviations (using the same neighborhood definition and extent) I only get a raster with values only for the outline boundary of the State of Florida, with nothing else within it (Fig. 2). I have tried the same procedure on a small subset of the 30m raster and used a neighborhood of, say, 10 x 10 cells instead of 67 x 67 and it works...that is why I believe it is a bug of some kind. </SPAN><BR /><BR /><SPAN>As an alternative, I also tried to use the Aggregate tool for the median, but there I found a different kind of bug I believe, since it return a full raster image, as it should, but with a few horizontal strips across the image (Fig. 3)....this does not happen for the mean for example.</SPAN><BR /><BR /><SPAN>Please any help is much appreciated since I need to find any kind of workaround.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Francesco</SPAN></BODY></HTML> Mon, 19 Nov 2012 18:13:50 GMT FrancescoTonini 2012-11-19T18:13:50Z Bug in Spatial Analyst - Block Statistics, Aggregate https://community.esri.com/t5/arcgis-spatial-analyst-questions/bug-in-spatial-analyst-block-statistics-aggregate/m-p/95948#M1338 <HTML><HEAD></HEAD><BODY><SPAN>Hello,</SPAN><BR /><BR /><SPAN>I would need some help with the following issue, which is maybe a bug in the block statistics tool, in ArcMap 10.0 (sp5).</SPAN><BR /><SPAN>I am trying to compute the median using the block statistics tool over an integer-type raster at 30m resolution (Fig. 1), for the entire State of Florida. The median is computed in my case using a rectangle (square) neighborhood of 67 x 67 cells, so that it matches the desired output block I need which is 2010m (30m x 67 = 2010m). However, in output, differently from block statistics mean or standard deviations (using the same neighborhood definition and extent) I only get a raster with values only for the outline boundary of the State of Florida, with nothing else within it (Fig. 2). I have tried the same procedure on a small subset of the 30m raster and used a neighborhood of, say, 10 x 10 cells instead of 67 x 67 and it works...that is why I believe it is a bug of some kind. </SPAN><BR /><BR /><SPAN>As an alternative, I also tried to use the Aggregate tool for the median, but there I found a different kind of bug I believe, since it return a full raster image, as it should, but with a few horizontal strips across the image (Fig. 3)....this does not happen for the mean for example.</SPAN><BR /><BR /><SPAN>Please any help is much appreciated since I need to find any kind of workaround.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Francesco</SPAN></BODY></HTML> Mon, 19 Nov 2012 18:13:50 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/bug-in-spatial-analyst-block-statistics-aggregate/m-p/95948#M1338 FrancescoTonini 2012-11-19T18:13:50Z