I came across some KAP charts which don't display correct corner coordinates from gdalinfo; despite them having REF fields in the header. For the NOAA file11425_3.KAP gdalinfo displays the coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 7820.0)
Upper Right (23476.0, 0.0)
Lower Right (23476.0, 7820.0)
Center (11738.0, 3910.0)
Any thoughts about this?
The .kap file contains GCP information. If you want gdalinfo to report the extent in real world coordinates, use gdalwarp to reproject the coordinates:
gdalwarp -t_srs epsg:4326 11425_3.kap 11425_3.tif
Corner Coordinates:
Upper Left ( -82.7970104, 27.6144688) ( 82d47'49.24"W, 27d36'52.09"N)
Lower Left ( -82.7970104, 27.0521030) ( 82d47'49.24"W, 27d 3' 7.57"N)
Upper Right ( -82.3611248, 27.6144688) ( 82d21'40.05"W, 27d36'52.09"N)
Lower Right ( -82.3611248, 27.0521030) ( 82d21'40.05"W, 27d 3' 7.57"N)
