To Whom it May Concern
I am trying to draw pressure contours on a topographic map as shown on the
following web site using GEMPAK 7.1 similar to what is done on the
following website:
http://www.unidata.ucar.edu/software/gempak/examples/topo/
Unfortunately I do have the area files present in this addition of GEMPAK.
I tried to use the world_topo.5min and make a .gem and then .gini file out
of this. Unfortunately when I do this I cannot always get the gini fill or
topographic overlay to display properly. When following the example shown
in the website below:
http://www.unidata.ucar.edu/software/gempak/examples/image_to_grid/sat_basemap/
using the following code:
GDTOPO << EOF
GDFILE = south_america_topo5.gem
GAREA = -60;-105;30;-20
GDATTIM = 070101/0000
TOPOFL = dem5
GEMPAK-GDTOPO>r
EOF
GDIMG << EPLT
GDATTIM = last
GDFILE = south_america_topo5.gem
GLEVEL = 0
GVCORD = none
GFUNC = topo
SCALE = 0
PROJ = mer
GRDAREA = -60;-105;30;-20
KXKY = 870;1090
CPYFIL =
SATFIL = south_america_satbase.gini
CALINFO = 99/10/SAT,0,94,0,286
WMOHDR = TICZ99/CHIZ/
GEMPAK-GD2IMG>r
EPLT
gpmap << EMAP
MAP = 1
GAREA = dset
PROJ = sat
SATFIL = south_america_satbase.gini
LUTFIL = upc_irsatbase.tbl
r
EMAP
I am able to get a descent topographic image of South America, but
when I alter the coordinates I get distorted topographic images.
How can I either obtain area files as specified in
http://www.unidata.ucar.edu/software/gempak/examples/topo or use the
procedure in
http://www.unidata.ucar.edu/software/gempak/examples/image_to_grid/sat_basemap/
to obtain pressure contours overlaid onto a topographic map for any
set of coordinates I would pick? For example it would be 10 N to 60 N
Latitude and 0 to 32 E Longitude?
Thanks,
Jason
