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osm_map_processing/elevation.md

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# Elevation Data
To add elevation data and contour lines to your maps, you'll need the below information.
# Credits
The information here and integration(s) in the main ```process_maps.py``` script were adapted from:
* http://forum.locusmap.eu/index.php?topic=1839.0
* https://www.openandromaps.org
# Prep
* You'll need a theme from : https://www.openandromaps.org/en/legend/elevate-mountain-hike-theme
* You'll need tag mappings : https://www.openandromaps.org/en/map-basics-2/tag-mapping
* You'll probably want tag transformations : https://www.openandromaps.org/en/map-basics-2/tagtransform
# Processing
1. Download various elevation data needed using phyghtmap (http://katze.tfiu.de/projects/phyghtmap/phyghtmap.1.html)
1. Download maps using ```download_maps.py```
1. Create a custom map list (see ```custom.list``` for an example) for use
1. Run map processing with ```--no-map-download```, ```--tag-mapping``` and ```--tag-transform```