Hi, I'm new to MrSID and raster imaging. I have an ortho quad, which appears to be registered, but I'm not real sure. When I open the file, I am prompted to choose a projection, but am unsure of exactly what to choose (see below). When I select the Lat/Lon category, and any category member, I get the error message "Image control points cannot be in a straight line". When I select any UTM projection, I don't get an error message, but I don't see the blasted thing on my map! Even when I open a new map window for the image, i see nothing.
Any help opening this is greatly appreciated. If anyone can direct me toward a good resource for understanding geo-projections, I'd appreciate that too. Am running MI 6.5. Some of the reference information that came with the file is below: Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 15 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -93.000000 Latitude_of_Projection_Origin: +00.000000 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 11262
