imcontour .pro uses ticlabels.pro which has the statement:
; RESTRICTIONS:
; Invalid for wide field (> 2 degree) images since it assumes that a
; fixed interval in Y (or X) corresponds to a fixed interval in Dec
; (or RA)
which explains why imcontour.pro gives wrong labeling and tick marks when using a larger sky field...
Also, when using SIN projection rather than TAN projections the routine gives wrong results and coordinates drawn around an image are not correct. If the image is converted e.g. from SIN to TAN projection by using e.g.
remap -w TAN -o output_TAN.fits Input_SIN.fits
If someone has a routine which does it better than ticlabels.pro please share...
imcontour .pro uses ticlabels.pro which has the statement:
; RESTRICTIONS:
; Invalid for wide field (> 2 degree) images since it assumes that a
; fixed interval in Y (or X) corresponds to a fixed interval in Dec
; (or RA)
which explains why imcontour.pro gives wrong labeling and tick marks when using a larger sky field...
Also, when using SIN projection rather than TAN projections the routine gives wrong results and coordinates drawn around an image are not correct. If the image is converted e.g. from SIN to TAN projection by using e.g.
remap -w TAN -o output_TAN.fits Input_SIN.fits
If someone has a routine which does it better than ticlabels.pro please share...