osm-building-shapes

Tile Reduce processor to find area, perimeter and a score that defines the shape of the building. Shape is defined as (4 * PI * area) / (perimeter^2) as here.

Usage

• npm install
• Download OSM QA Tiles.
• node index.js [--bbox --zoom] --mbtiles path-to-mbtiles

The output is line delimited FeatureCollection with properties:

{
    "building": "yes",
    "perimeter": 1.021,
    "shape": 50.63,
    "_osm_way_id": 143251631,
    "area": 0.042
}

_Here's a map of building sizes in Monaco_