>Ken - > >I have saved a DEM mosaic as an ERMapper raster file, but there are >several bad elevation values in this file (I can see them as single pixel >holes when viewed in 3D mode). I wondered if there is a way to find these >points and have ERMapper replace them with a new value based on an >interpolation of the surrounding 8 values.
One way is to set your null cell value to None (so all pixels get processed), then run a median filter on the image to replace the extraneous values with the median value of the neighbors. You can get more complicated using regions to isolate the processing to small areas to not affect the good data. >On another issue, I am trying to export an ERMapper image into Verical >Mapper (a plug-in for MapInfo) and I can't find a mutual format they both >support. Vertical Mapper will import an ASCII file with 6 lines of header >(number of rows, number of columns, X of lower left node, Y of lower left >node, cell spacing, NULL value) followed by rows of space delimited float >point values. Is there a way to get ERMapper to export in this format? Use Utilities/Export Raster/ASCII BIL, then manually add those lines you noted above to the top of the output ASCII file, then import it into Vertical Mapper. Eric Augenstein --------------------------------------------------------------- Earthstar Geographics E-mail: [EMAIL PROTECTED] Internet: www.es-geo.com ER Mapper Wizards: www.es-geo.com/wizard.html TerraColor World: www.es-geo.com/terracolor.html Tel: +1 858-455-9970 Fax: +1 858-455-9971 --------------------------------------------------------------- ----------------------------------------------------------- To make changes to your subscription, please visit our website, http://www.ermapper.com/technicl/ermapperl/index.htm
