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Re: Map Projection [message #86271 is a reply to message #86267]

Tue, 22 October 2013 08:12

suicidaleggroll
Messages: 14
Registered: September 2013

Junior Member

On Tuesday, October 22, 2013 8:47:26 AM UTC-6, Morgan Silverman wrote:
> Hello,
>
>
>
> I'm trying to create a basic plot with a map of the US and trajectory data plotting on top. I'm trying to follow the map projection method using mapCoord = Obj_New('cgmap', 'Lambert Azimuthal', Limit=limit).
>
>
>
> I keep coming across an ellipsoid statement in most of the examples I've found but I can't find any explanation as to what it is. Different examples have use ellipsoid=24, ellipsoid=19, ellipsoid=WGS84, etc...I don't know if I need this or how to set it if I do.
>
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> Can someone please explain what the ellipsoid statement is? And, is mapCoord=Obj_New('cgmap', ....) the best way to go about plotting a map of the United States? Thank you.
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> Sincerely,
>
> Morgan

You could always use the regular map_set and map_continents procedures:

map_set, 0, 0, /cyl, /iso, /noborder, limit=[25,-125,50,-67]
map_continents, /hires
map_continents, /hires, /usa
plots, lons, lats, psym=2

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[Message index]

		Map Projection By: morganlsilverman on Tue, 22 October 2013 07:47
		Re: Map Projection By: David Fanning on Tue, 22 October 2013 08:08
		Re: Map Projection By: morganlsilverman on Tue, 22 October 2013 10:25
		Re: Map Projection By: Andy Sayer on Tue, 22 October 2013 10:45
		Re: Map Projection By: David Fanning on Tue, 22 October 2013 11:15
		Re: Map Projection By: suicidaleggroll on Tue, 22 October 2013 08:12
		Re: Map Projection By: Phillip Bitzer on Tue, 29 October 2013 17:23

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