[Xastir] Goodbye GeoTIFF, Hello GeoPDF

[Lee Bengston]

On Mon, Mar 21, 2016 at 2:28 PM, Brian Heaton <geekdownrange at gmail.com>
wrote:

> I cranked the dpi setting in the script so mine would look good at higher
> zoom levels. Bigger files but storage is cheap.
>
> ​Resurrecting an old thread here.  I've been converting geopdf's lately
and found it's easier now to install prerequisites because the current
version of the binary gdal package in Ubuntu supports the conversion - no
need to build gdal from source.  My laptop is on Ubuntu 17.10, so anyone on
that release or 18.04 should be able to take advantage.
  I'm not sure where the cutoff is, but I do know Ubuntu 16.04 required a
source build of gdal because the binary version was below version 1.8.1.

I've been looking through the geopdf2gtiff.pl script, but I can't find
where to increase the "dpi setting" as the person above indicated had been
done.  If anyone can shed some light on that (or debunk it if it's not
possible), I would appreciate it.


Thanks,
Lee
K5DAT


>
> >       From: Lee Bengston <lee.bengston at gmail.com>
> >  To: Xastir - APRS client software discussion <xastir at lists.xastir.org>
> >  Sent: Monday, March 21, 2016 10:18 AM
> >  Subject: Re: [Xastir] Goodbye GeoTIFF, Hello GeoPDF
> >
> > Xastir has a script that uses gdal to convert GeoPDF to GeoTIFF.  Tom
> Russo
> > wrote it a few years ago and refined it much more recently.  There was
> > quite a bit of discussion about it not too long ago.
> >
> > Lee - K5DAT
> > On Mar 21, 2016 11:12 AM, "Curt Mills" <curt.we7u at gmail.com> wrote:
> >
> > > As I recall the geoPDF's have multiple layers that can be
> > enabled/disabled
> > > for viewing. I'm not sure whether these files can be directly used
> within
> > > other programs w/o having to implement Postscript and a bunch of other
> > > stuff. Would be worth investigating though.
> > >
> > > On Mon, Mar 21, 2016 at 7:47 AM, Eric Christensen <
> > > eric at christensenplace.us>
> > > wrote:
> > >
> > > > -----BEGIN PGP SIGNED MESSAGE-----
> > > > Hash: SHA256
> > > >
> > > > I recently learned that USGS will no longer release GeoTIFF-formatted
> > > > map files in favor of GeoPDF[0].  This will likely cause problems for
> > > > Xastir.  I did locate a instructions for converting the GeoPDF to
> > > > GeoTIFF[1].
> > > >
> > > > [0] http://www.usgs.gov/faq/taxonomy/term/10413
> > > > [1] http://www.usgs.gov/faq/node/3704
> > > >
> > > > - --Eric
>