remove nulls and ASCII grids

[Ken Hickey]

G'day All   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.   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?     Cheers Ken Hickey ------------------------------------------------------------------ Dr Kenneth Hickey Mineral Deposit Research Unit (MDRU) Department of Earth and Ocean Sciences University of British Columbia 6339 Stores Rd, Vancouver, BC  V6T 1Z4, Canada phone +1-604-822-3765; Fax +1-604-822-6088 email: [EMAIL PROTECTED]   .