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Re: I'm doing something wrong with map_image [message #76378 is a reply to message #76377]

Tue, 31 May 2011 14:31

almost_like_a_metapho is currently offline

almost_like_a_metapho
Messages: 8
Registered: May 2011

Junior Member

On May 31, 5:10 pm, David Fanning <n...@idlcoyote.com> wrote:
>
> Why are you using Map_Image? Your image, you say, is
> in a map projection already. You certainly don't want
> to warp it again.
>
> Without seeing your code, it is hard to say what
> simple thing you are missing. But generally, once
> you have a map coordinate system set up, drawing on
> top of it is as simple as specifying your locations in
> latitude and longitude coordinates.
>
> Cheers,
>
> David

The image is map projected, yes, but at 3000x1500, one pixel is some
fraction of a degree. ANd my data locations are at some other
fractional degree values.

I wanted to take a chunk of the map, plot the grid lines over it, and
then my data outline. I have coordinates for that, and can do plots or
polyfill pretty easily. The issue I'm having is aligning the grid with
my image. In my fondest wishes, I'd want to have the image slice
displayed in the frame of my map_grid grid, which I can then plot the
grid lines and data outline on top of.

I"m guessing I'm doing something bass ackwards here.

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[Message index]

		Re: I'm doing something wrong with map_image By: almost_like_a_metapho on Tue, 31 May 2011 21:22
		Re: I'm doing something wrong with map_image By: David Fanning on Tue, 31 May 2011 20:48
		Re: I'm doing something wrong with map_image By: almost_like_a_metapho on Tue, 31 May 2011 18:05
		Re: I'm doing something wrong with map_image By: David Fanning on Tue, 31 May 2011 15:05
		Re: I'm doing something wrong with map_image By: David Fanning on Tue, 31 May 2011 14:41
		Re: I'm doing something wrong with map_image By: David Fanning on Tue, 31 May 2011 14:33
		Re: I'm doing something wrong with map_image By: almost_like_a_metapho on Tue, 31 May 2011 14:31
		Re: I'm doing something wrong with map_image By: David Fanning on Tue, 31 May 2011 14:10
		Re: I'm doing something wrong with map_image By: almost_like_a_metapho on Wed, 01 June 2011 16:32

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