Create overlay vector tiles

[kylebarron]

Now that I've figured out how to use (online) vector tiles as an overlay/Fill layer in the mobile app (https://github.com/nst-guide/mobile/issues/9), create vector tiles with (all?) overlays.

Example file sizes:

• NF boundaries GeoJSON: 17MB
• NP boundaries GeoJSON: 2MB
• Wilderness boundaries GeoJSON: 17MB

Mbtiles with all of the above:

• 6.5MB including all attributes
• 3.2MB not including attributes (less than 10% the above size)

So figure out what attributes you need:

I think just an identifier is best because then you never have to update these vector tiles.

What layers should be combined?

Because the individual layer file sizes are so small, you should probably package as many of these together as you can. So have basically three vector tilesets:

Minimal required:

• OpenMapTiles: I don't really want to touch this process, except maybe to add contours into this. I shouldn't make the default map include non-essential layers
• Contours: this could be combined with OMT, but for now, keep it as its own, because it's not worth the $8 to re-upload all the OMT tiles to S3.
• Hillshade: this has to be by itself because it's raster?

Anything non-default

Because the file sizes are small, package up lots of layers into a single non-default tileset.

• National Park boundaries
• National Forest boundaries
• Wilderness boundaries
• Historical wildfires
• No-camping boundaries (though maybe this should be separate because these could be updated more-frequently)
• Land cover types? from national land cover dataset
• State boundaries?
• Slope-angle shading? But then you'd have to convert the raster to vector.
• Protected-area database Might be helpful for state-level public lands. But maybe take out nps/nf boundaries to not have redundancy?

[kylebarron]

I need to figure out how to display these correctly on web. As of now, they flicker when shown through Deck.gl. Maybe the new MVT layer in 8.1 could help.

[kylebarron]

Note however that it might be great for mobile. Because theoretically for each overlay that doesn't update like land agencies, historical wildfires, no camping zones, that can be its own vector source with its own tile JSON file. Then it would be super easy on mobile to just download it as its own pack.