Download Lac map in GeoJSON format

A map built from OpenStreetMap data, ready to download

Download GeoJSON≈ 8.2 MBOpen Beta

Customize the map

Open this place's area in the constructor and adjust everything to your needs

Open in constructor →

Map passport

Area19 778 km²

Buildings85 579

Roads4 854 km

Points of interest194

What this map contains by default

This is how the map is built as-is — every setting can be changed in the constructor.

FormatGeoJSON .geojson

LayersRoads, Buildings, Water, Greenery, Points of interest change

Stylestandard change

Detailauto change

House numbersnot visible at this scale change

Points of interestmajor objects only change

Coordinate systemWGS 84 (auto) change

Sheet sizeauto change

Relief & gridoff change

About GeoJSON

Map of Lac in GeoJSON: 85 579 buildings, 4 854 km of roads, 194 points of interest, 1% green areas — in the WGS 84 coordinate system, units are meters.

Which layers are in the file

This file for the selected area contains:

Roads
Buildings
Water
Greenery
Points of interest

What the file carries

The GeoJSON file for Lac: the whole map comes as a single file, the file is plain text and opens in any editor, all features lie in one collection, and the source layer name stays in the _layer field, OpenStreetMap tags are kept as feature attributes.

File size

The expected size of the GeoJSON file for Lac is about 8.2 MB; the exact size depends on the chosen layers and area.

GeoJSON file passport

Estimated from the place's OSM data; exact figures are in the file after the build.

Layers: 16
Features by geometry type (estimated): points 194, lines ≈ 24 268, polygons 86 662
Most common tags of the place: highway=unclassified ≈ 18 857, building=residential 2 393, highway=residential ≈ 1 528, highway=secondary ≈ 1 282, highway=tertiary ≈ 1 078, highway=trunk ≈ 798, highway=primary ≈ 705, water_well 57, building=commercial 46, marketplace 40

Losses: nothing to lose.

Build recipe: GeoJSON (RFC 7946): one FeatureCollection for all layers, WGS 84 (EPSG:4326), 6 decimal places in coordinates, frame 227 × 168 km, simplification tolerance 334 m; OSM tags → properties.

Coordinate systems

WGS 84 (EPSG:4326), selectable in the wizard

Category	GIS
File extension	`.geojson`
Tier	Open Beta

How many times GeoJSON was built in the last 90 days

Lac: 0
Chad: 0
Whole site: 1151
Median file size: 0.8 MB
Median build time: 2.4 s

Medians are based on all builds on the site

How to use GeoJSON for Lac

geojson.io — drag the file into a browser window and see the features on the map right away, clicking to inspect properties.
QGIS (free) — Layer → Add Vector Layer, choose the .geojson.
Leaflet / Mapbox GL JS / OpenLayers — put the file next to your project and hook it up: in Leaflet that is L.geoJSON(data).addTo(map), in Mapbox GL a source of type geojson.

Programs that open GeoJSON

LeafletMapboxQGISD3.jsKepler.glGeoPandas

FAQ: GeoJSON for Lac

Can I open GeoJSON in a browser?

Yes, on geojson.io or any web app with Leaflet/Mapbox.

Is GeoJSON a free format?

Yes — the format itself is open (RFC 7946), and exporting to it on OSM2CDR is free. There is only one limitation, a technical one: the larger the area, the coarser the detail, so that the file stays a workable size.

Can I load GeoJSON into PostGIS?

Yes, via ogr2ogr or directly with SQL functions like ST_GeomFromGeoJSON.

How do I split the export back into layers?

All the layers arrive in one FeatureCollection, but every feature has a service property _layer — roads, buildings, water, green_areas and so on. Filtering on that field in QGIS, Leaflet or GeoPandas splits the file into separate layers in a single line.

Which projection do the coordinates arrive in?

WGS84 (EPSG:4326) — plain latitude and longitude, as the GeoJSON specification requires. Nothing needs reprojecting for the web or for GIS; if your project is run in a metric system, the conversion is done on the QGIS or PostGIS side.