We have "average" plus other kinds of slope... FITTED - is the default keyword and results in the slope of a plane fitted through the values of the target cell and its eight neighbors. MAXIMUM - specifies that the maximum of the four possible slopes drawn through the eight neighbors is assigned to the center cell. MINIMUM - specifies that the minimum of the four possible slopes drawn through the eight neighbors is assigned to the center cell. AVERAGE - specifies that the average of the four possible slopes drawn through the eight neighbors is assigned to the center cell. ..."fitted" is arguably the best. The only other kind of slope calculation uses TIN (Triangulated Irregular Network) and reports the inclination of the individual triangular facets-- great for describing a surface but can't be used with grid-based maps and analysis. Watch here for more Spatial Analysis for GRIDs. MidNight Mappers ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
