[Xastir] Re: Bounding boxes [Re: USGS maps no longer free]

[Curt Mills, WE7U]

On Mon, 6 Oct 2003, Tom Russo wrote:

> And now that I think about it, the data listed by listgeo are probably the
> corner coordinates of the entire image, not the data for the map collar --- 
> therefore making their use in an FGD file pointless.
> 
> The best way to get the bounding data that allows stripping off the
> map collar would be to look at the map itself and pick off the
> lattitude of the top and bottom neatlines, and the longitude of the
> left and right neatlines.  Those will, in all probability, be
> multiples of 7.5m, 15m, etc., depending on whether they're 1:24000,
> 1:100000, etc.

Yes.  _That_ is the correct way to do it.  The *.fgd file is used for
exactly that purpose in Xastir:  Chopping at the map neat lines.

It's also used for stretching the UTM projected image into a
rectangle.

Curt, WE7U.				archer at eskimo.com
http://www.eskimo.com/~archer
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