# osm-building-shapes

**Repository Path**: mirrors_mapbox/osm-building-shapes

## Basic Information

- **Project Name**: osm-building-shapes
- **Description**: Tile Reduce processor to find area, perimeter and score to define shapes of buildings in OSM using OSM QA Tiles
- **Primary Language**: Unknown
- **License**: ISC
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-09
- **Last Updated**: 2025-10-04

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 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](http://www.empix.com/NE%20HELP/functions/glossary/morphometric_param.htm).

#### Usage
* `npm install`
* Download [OSM QA Tiles](osmlab.github.io/osm-qa-tiles/).
* `node index.js [--bbox --zoom] --mbtiles path-to-mbtiles`

The output is line delimited FeatureCollection with properties:

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

<img width="938" alt="screen shot 2016-04-05 at 20 49 40" src="https://cloud.githubusercontent.com/assets/371666/14287337/ff1744a2-fb6f-11e5-8dd9-fd792cb95d64.png">
_Here's a map of building sizes in Monaco_