> I have download the Pre-compiled binaries NCAR Graphics for redhat linux
> 9.0. It works well on my pc and benefits me a lot. However, recently I
> am puzzled by a question and desire for your help!
> That is, whether or not I could add some lines of myself according to
> my Lat-lon data as the background map for I want to make my research filed
> more explicit ? If so, then what program I have to modify and what I have
> to do then? Thanks!
Once EZMAP is initialized by a call to MAPDRW (which actually draws a
basic map) or MAPINT (which just precomputes some numeric quantities that
will be needed and readies the package for use), one can draw objects on
a map that are defined by lat/lon coordinates. The principal routines of
interest are MAPIT (also known as MDPIT) and MAPIQ (also known as MDPIQ),
but there are some other routines that might be of use.
See the section of the EZMAP programmer document titled
Routines Used to Draw Objects on a Map
at
http://ngwww.ucar.edu/ngdoc/ng4.3/supplements/ezmap/#DrawObjects
as a starting point.
The next section, titled
Routines Used to Draw Solid-Filled Maps (EZMAPA)
mentions the routines MAPITA, MAPIQA, MAPITM, and MAPIQM, which can be
used to add objects defined by lat/lon coordinates to an area map and
subsequently color-fill them.
The example "mpexfi" shows how to call MAPIT and MAPIQ, though in a bit
frivilous way. If need be, I could create a better example for you ...
Dave Kennison
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