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mapbox / tile-reduce

mapreduce vector tile processing
ISC License
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Output results to mapbox studio #70

Closed jingsam closed 8 years ago

jingsam commented 8 years ago

Hi, I am looking for suggestions. Recently, I am using tile-reduce to do some statistics on osm-qa-tiles. I want to calculate a metric (e.g. road density) on each tile of zoom 12, then output to mapbox studio for visualization. The problem is how to store the result. As zoom 12 has 16 million tiles, using GeoJson, MBtiles, or UTF8Grids maybe too large for storage. So I hope to get some advice from you as you are experts in this field.:pray:

mourner commented 8 years ago

The actual number of z12 tiles for a world dataset is 2.1 million, which is more manageable. Eventually we may implement writing vector tiles as output, but currently you'd have to generate GeoJSON and then run tippecanoe on it. If the size is too big, you'd have to split the jobs, e.g. into regions (North America, etc.), and possibly use a lower zoom level.