Hello all, I am working on a land cover change analysis; I recently created a canopy cover raster with the following projection info: NAD_1927_UTM_Zone_11N WKID: 26711 Authority: EPSG Projection: Transverse_Mercator False_Easting: 500000.0 False_Northing: 0.0 Central_Meridian: -117.0 Scale_Factor: 0.9996 Latitude_Of_Origin: 0.0 Linear Unit: Meter (1.0) Geographic Coordinate System: GCS_North_American_1927 Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_North_American_1927 Spheroid: Clarke_1866 Semimajor Axis: 6378206.4 Semiminor Axis: 6356583.799998981 Inverse Flattening: 294.9786982 I received LIDAR-derived DSM's and DTM's for the same area but from a later year with the following projection info: WGS_84_UTM_zone_11N Authority: Custom Projection: Transverse_Mercator false_easting: 500000.0 false_northing: 0.0 central_meridian: -117.0 scale_factor: 0.9996 latitude_of_origin: 0.0 Linear Unit: Meter (1.0) Geographic Coordinate System: GCS_WGS_1984 Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_WGS_1984 Spheroid: WGS_1984 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314245179 Inverse Flattening: 298.257223563 When I imported the new DTM's and DSM's, the layers were slightly off (by about 80 meters or so). I edited the spatial reference information in ArcCatalog and the layers still did not match up. I used the Project Raster tool and the layers still did not match up. I used the Define Projection tool and the layers still did not match up. Any ideas on why these two datasets are not matching up? What should I do? Thanks! David
... View more
I did this and it still gives me this error: An ERROR Occured! Executing: SelectLayerByAttribute temp_layer NEW_SELECTION ""grid_code" > '3'" Start Time: Tue Apr 22 23:29:17 2014 ERROR 000358: Invalid expression An invalid SQL statement was used. An invalid SQL statement was used. [P303_LIDAR_Poly] Failed to execute (SelectLayerByAttribute). Failed at Tue Apr 22 23:29:17 2014 (Elapsed Time: 0.00 seconds) End of the script!
... View more