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nst-guide / data

Create map waypoints and layers from open data sources
https://nst-guide.github.io/data/
GNU General Public License v3.0
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Cut and upload National Forest maps #20

Closed kylebarron closed 4 years ago

kylebarron commented 4 years ago

I forget where I am with US forest topo maps. But in any case I need to figure out the gdal commands to cut them into seamless tiles. Do I need to create a metadata.json file for these raster tiles?

kylebarron commented 4 years ago

After https://github.com/nst-guide/create-database/commit/216c11f422cc4ed566e456a5cadcfa9f6338d8fd I think I'm pretty much done with the cutting code.

kylebarron commented 4 years ago

I made high res (512px) tiles from all the fstopo maps. Granted, I kept all files within 20-miles of the trail, which is obviously way too much, but still, it's a lot of files:

> du -csh * | sort -h
4.0K    tilemapresource.xml
8.0K    leaflet.html
 12K    openlayers.html
 16K    googlemaps.html
 44K    4
136K    5
488K    6
1.8M    7
7.1M    8
 28M    9
106M    10
404M    11
1.5G    12
4.7G    13
 11G    14
 17G    15
 35G    total

Let's say that I only host up to zoom 14, and I leave out 80% of the tiles. That's still 3.6GB of tiles for the trail, and in five sections, that's 700MB per section of the trail. I know high-res stuff is beautiful, but this is why vector tiles exist, so that you can have beautiful high-res things without making people download 700MB of data.

Also, including to level 15, there are 300,000 files here. I guess that is still only $1.5 to PUT all those files, but only do it if it's actually going to be worth it.

> tree | wc -l
  308119
kylebarron commented 4 years ago

Fixed in https://github.com/nst-guide/fstopo