geojson-polygon-labels

• Command line tool to generate point labels from GeoJSON polygons.
• Point and Line features present in the input are ignored.
• Supports GeometryCollections and MultiPolygons with options to label each part, only the largest part, or treat all parts as one.
• Label placement algorithms are polylabel pole of inaccessibility, centroid and center of mass.
• Source feature properties are retained.
• Optionally adds an _area property (in m²)
• Optionally adds a _bbox property ([west, south, east, north])
• Optionally adds a tippecanoe minzoom to each label

Install

npm install --global geojson-polygon-labels

Command Line

geojson-polygon-labels [--precision=0.001] [--include-area] [--include-bbox] [--label=polylabel] [--style=explode] [--include-minzoom=0-16] [--verbose] layer.geojson > labels.geojson

• --precision Polylabel precision. Defaults to 0.001 since GeoJSON is usually in geographic coordinates.
• --label Label placement algorithm. Options are polylabel, centroid, center-of-mass.
• --include-area Adds an _area property in m².
• --include-bbox Adds a _bbox property as [west, south, east, north]
• --style How to place labels for GeometryCollections or Multi* Geometry types. Options are explode, largest, combine.
• --include-minzoom will try to determine a suitable minzoom for the label to appear at and save it in the tippecanoe key for use in tippecanoe. Value in the form min-max where min is the smallest minzoom and max the largest minzoom.
• --ndjson Indicates input is in ndjson format.