[Xastir] GeoPDF try

[Lee Bengston]

On Sun, Dec 13, 2015 at 12:23 AM, Tom Russo <russo at bogodyn.org> wrote:

> On Sat, Dec 12, 2015 at 09:32:17PM -0700, we recorded a bogon-computron
> collision of the <russo at bogodyn.org> flavor, containing:
> > You can experiment with compression to see if it works for you.  Look at
> > the bottom of geopdf2gtiff.pl and you'll see two commented out
> > lines:
>
> I just experimented with this and found very little benefit from
> compression.
> No matter what compression algorithm I chose, I still got a file bigger
> than
> 110MB.  Not worth bothering.  I didn't try any of the compressed versions
> in
> Xastir.
>
> If you would like to try generating the GeoTIFF without imagery, find the
> line towards the end of the script where the code sets up the gdalwarp
> command and add
>   -oo 'LAYERS_OFF=Images,Images.Orthoimage' -oo 'DPI=250.0'
> to the command line options.
>
> Without the imagery, you don't need the high DPI that will be used by
> default,
> and so the thing processes much, much quicker (less than a minute, vs. more
> than 40 minutes).  And instead of a 100+MB file, you get a 26MB file.
> The result looks very, very nice.
>
>
​
Thanks, Tom, for all the detailed feedback, which is not out of character
:-)

I thought building gdal from source might be required given I had to do
that last time.​

​ Back then I had aspirations of documenting step by step what it took to
convert and use those maps but never got to it.  At that time they came out
a little dark but were still very usable.  It sounds like the newer
geoPDF's may convert into nicer looking maps.  I'm off to try the FTP site
from your other message so I can take a look.

Thanks again.
Lee - K5DAT