# london x 400
./alpinia.py -x gallery/londinium.xml --hillshade 400 --center 51.51 -0.06 --scale 35000 gallery/londinium.png

./alpinia.py -x gallery/londinium.xml --hillshade 400 --size 800 200 --center 51.48 -0.02 --scale 50000 gallery/londinium-small.png

./alpinia.py -x gallery/londinium.xml --hillshade 400 --size 800 200 --center 51.49 -0.06 --scale 170000 gallery/londinium-wide.png


# edinburgh x 500
./alpinia.py -x gallery/sevenhills.xml --hillshade 500 --scale 20000 --center 55.938 -3.225 gallery/sevenhills.png

./alpinia.py -x gallery/sevenhills.xml --size 800 200 --hillshade 500 --scale 40000 --center 55.943 -3.215 gallery/sevenhills-small.png

## usage: alpinia.py [-h] [--xml XML] [--size SIZE SIZE] [--center CENTER CENTER]
##                   [--scale SCALE] [--hillshade [HILLSHADE]]
##                   [output]
## 
## alpinia! comically exaggerated relief maps made easy
## 
## positional arguments:
##   output                output filename (default: alpinia.png)
## 
## optional arguments:
##   -h, --help            show this help message and exit
##   --xml XML, -x XML     mapnik style file (default: alpinia.xml)
##   --size SIZE SIZE      output width and height in pixels. if one of them is
##                         0, the other will be chosen so that the aspect of the
##                         map matches that of the input data file (default:
##                         [1920, 1080])
##   --center CENTER CENTER
##                         desired map center (latitude and longitude in degrees)
##   --scale SCALE         desired map scale
##   --hillshade [HILLSHADE], -z [HILLSHADE]
##                         (re-)generate hillshading. input and output filename
##                         are extracted from the xml file's 'relief' and
##                         'hillshade' layers respectively. optionally, specify
##                         the z exaggeration to use for the hillshading
##                         (default: 1.0)