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Re: MAP_SET vs MAP_PROJ_* [message #41664 is a reply to message #41587]

Wed, 10 November 2004 20:04

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Liam Gumley wrote:
> James Kuyper wrote:
>
>> Liam Gumley wrote:
>> ...
>>
>>> For example, how do do you define a Lambert Azimuthal Equal Area
>>> Projection in direct graphics centered at a given lat/lon with a
>>> specified resolution, such as 1000 meters per pixel?
>>
>>
>>
>> Since the pixels per centimeter can be different for the x and y axis,
>> you'll have to decide which axis it is that you want to be at 1000
>> meters per pixel. Assuming that it's the Y-axis, this should do it:
>>
>> lat = 22
>> lon = 90
>> resolution = 1000.0
>> MAP_SET,lat,lon,/LAMBERT,scale=resolution*100*!D.Y_PX_CM,/hi res,/grid,/label
>>
>>
>> You didn't ask for the coastlines, the grid, or the labels, but I
>> thought it would be good to have something to tell whether the MAP_SET
>> was correct.
>
>
> Thanks James, I am quite familiar with using MAP_SET in this fashion. I
> am interested in learning how to achieve the same result with the
> MAP_PROJ commands.

Sorry - I'm not familiar with MAP_PROJ, since it's not available in the
version of IDL installed on our machines. What does MAP_PROJ do that
makes it unacceptable to use MAP_SET instead?

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[Message index]

		Re: MAP_SET vs MAP_PROJ_* By: JD Smith on Mon, 15 November 2004 11:01
		Re: MAP_SET vs MAP_PROJ_* By: btt on Mon, 15 November 2004 09:11
		Re: MAP_SET vs MAP_PROJ_* By: James Kuyper on Wed, 10 November 2004 20:04
		Re: MAP_SET vs MAP_PROJ_* By: Liam Gumley on Wed, 10 November 2004 13:20
		Re: MAP_SET vs MAP_PROJ_* By: James Kuyper on Wed, 10 November 2004 10:05
		Re: MAP_SET vs MAP_PROJ_* By: Liam Gumley on Wed, 10 November 2004 08:37
		Re: MAP_SET vs MAP_PROJ_* By: Gadhavi on Tue, 08 February 2005 08:29

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