Russ,
> I would like to put colored labels or dots on a map with the color of the
> dots (or labels) dependent on the country. My question is: Given the
> lat/lon of a point, how do you get NCAR to tell you what country ID number
> corresponds to that single point?
>
> Is the solution to draw a small line through each point and use MAPITM to
> tell me (via the masking subroutine) the area identifier of the line? This
> solution would be really, really cumbersome.
>
> Thanks.........russ mcelhaney (mcelhane AT unknown)
Once you have an area map containing geographic information, you can use the
AREAS routine ARGTAI to obtain area ID information for a point. It expects
to be called with the user coordinates of the point, but you can get those
from lat/lon coordinates by calling the EZMAP routine MAPTRN or MAPTRA. Be
careful to check the returned user coordinates for the special value 1.E12,
which EZMAP uses as a signal that the point you're asking about is not on
the map defined by its current state.
Dave Kennison
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