[Xastir] GeoPDF

[Tom Russo]

On Mon, Sep 05, 2011 at 01:53:15PM -0600, we recorded a bogon-computron collision of the <russo at bogodyn.org> flavor, containing:
> On Mon, Sep 05, 2011 at 02:13:35PM -0400, we recorded a bogon-computron collision of the <lee.bengston at gmail.com> flavor, containing:
> > 
> > Great - thanks for the new creation!  I've got to check and see if my
> > gdal was built with python support, and it figures the maps I
> > downloaded are mostly the ones that most likely don't have the correct
> > neatline specifiers.  I'll have to give things a try later - too tied
> > up in other stuff now.
> 
> If you hold off a little bit longer (less than a half hour) I will have 
> a second cut --- this version has an option that allows you to "fudge"
> a neatline.  It finds the nearest 7.5' quad boundaries that enclose the
> map and uses that as neatline instead of what is in the GeoPDF.  This definitely
> works on the couple I've tested so far, and should work on 15' quads (because
> I'm doing it by finding left, right, top and bottom boundaries just inside
> the full image that round off to even 7.5' numbers).
> 
> That'll allow you to use the newer GeoPDFs with bad neatlines.

Committed.  Requires not only GDAL 1.8.1 with python support, but also
the Perl module "Getopt::Long."  This module is installed by the "perl-base"
package on my Ubuntu machines, but needed to be installed separately
as devel/p5-Getopt-Long on my BSD machine.  You may well already have it
if you're using Linux (try man Getopt::Long to verify).

To run, use:

 geopdf2gtiff --fixneatline foo.pdf

or 

 geopdf2gtiff -f foo.pdf

and it'll find the closest 7.5' left, right, top and bottom boundaries that
lie inside your geopdf, and clip to those.  Should work for any USGS product,
but should not be needed unless you verify that the neatline stored in the
GeoPDF is unusable.

This is better than just generating an FGD for the thing, because it'll mean
less work (and therefore faster map loads) for Xastir every time you display
it.

-- 
Tom Russo    KM5VY   SAR502   DM64ux          http://www.swcp.com/~russo/
Tijeras, NM  QRPL#1592 K2#398  SOC#236        http://kevan.org/brain.cgi?DDTNM
 "One man alone can be pretty dumb sometimes, but for real bona fide
 stupidity, there ain't nothin' can beat teamwork." - Edward Abbey