| Re: google earth projections [message #63368 is a reply to message #63293] |
Tue, 04 November 2008 08:09   |
R.G. Stockwell
Messages: 363
Registered: July 1999
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Senior Member |
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<liamgumley@gmail.com> wrote in message
news:289e776d-2109-496e-a3b2-541e0d71a1c0@v39g2000pro.google groups.com...
On Nov 3, 6:42 pm, "R.G. Stockwell" <notha...@noemail.com> wrote:
> <liamgum...@gmail.com> wrote in message
>
> news:2f8cf74c-b86f-4ece-bb13-694bf3badde3@n1g2000prb.googleg roups.com...
> On Nov 1, 2:20 pm, "R.G. Stockwell" <notha...@noemail.com> wrote:
> Bob,
> MAP_PROJ_FORWARD converts from lon,lat to x,y
> MAP_PROJ_INVERSE converst from x,y to lon,lat
> Both of these routines require a map structure variable from
> MAP_PROJ_INIT.
> Cheers,
> Liam.
> Practical IDL Programming
> http://www.gumley.com/
Excellent,
thank you Liam, you have
saved me a good deal of time reading through
the documentation (I read through the map projection
chapter in the user guide, and really got nothing out of it.)
I've been doing map projections and overlaying data for years,
but have never had to venture out of the use of map_set, til now.
Cheers,
bob
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