GeoJSON
Open BetaA GeoJSON egy nyílt, JSON-alapú térbeli adatformátum. A webfejlesztők szabványos megoldása, kompatibilis a Leaflettel, a Mapboxszal, az OpenLayersszel, a D3.js-szel és bármely térinformatikai szoftverrel.
Fő jellemzők
A(z) GeoJSON formátumról
GeoJSON is an open geodata format (RFC 7946) in which geography is written as ordinary JSON: an array of features, each with a geometry and a set of properties. A human can read it in a text editor, any programming language parses it in one line, and practically all web cartography understands it — Leaflet, Mapbox GL, OpenLayers, D3.js — with no plugins or converters.
An OSM map is exported to GeoJSON when you need the features themselves rather than a picture: to attach a layer to a website, compute statistics for a district, filter the categories you need, load the data into PostGIS or run it through GeoPandas. It is also the most convenient intermediate format: from it, ogr2ogr or QGIS will make SHP, GeoPackage, KML — anything you like.
The output is a single UTF-8 file: one FeatureCollection gathering all the layers of the selected area. Every feature keeps its OpenStreetMap attributes (name, type, tags) and a service property _layer with the name of its source layer — one line of filtering takes the data apart again into roads, buildings, water, greenery and points of interest. Coordinates are WGS84 (EPSG:4326), as the specification requires; the recorded precision is six decimal places, about ten centimeters on the ground: the file drops into any GIS and any web framework with no reprojection.
Milyen program nyitja meg a(z) GeoJSON fájlokat
A következő programok és alkalmazások képesek megnyitni, szerkeszteni és kezelni az OSM2CDR-ből exportált GeoJSON (.geojson) fájlokat:
Format specifications
- Open standard
- 3D coordinates supported
- Lossless (no quality loss)
- Stores feature attributes
- Output: 1 file
- RFC 7946 GeoJSON. Single UTF-8 file. WGS84 (EPSG:4326). Coordinate precision: float64. Direct import in QGIS, Mapbox, Leaflet, PostGIS.
Ki használ GeoJSON térképeket
Hogyan exportáljon GeoJSON formátumba
Hogyan nyissa meg az exportálás után
- geojson.io — drag the file into a browser window and see the features on the map right away, clicking to inspect properties. Good for a quick check; large files are better not uploaded there.
- QGIS (free) — Layer → Add Vector Layer, choose the .geojson. After that: filter on the _layer field, styling, export to SHP or GeoPackage.
- 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.
- Python and data analysis — geopandas.read_file("map.geojson") and then the pandas toolkit: slices by feature type, areas, density, joins with your own tables.
- PostGIS and databases — ogr2ogr -f PostgreSQL PG:"..." map.geojson loads everything in one command; by hand, the geometry is read with ST_GeomFromGeoJSON.
Népszerű térképek GeoJSON formátumban
Szerezzen be GeoJSON térképexportokat
Töltsön le professzionális GeoJSON térképeket az OpenStreetMap adataiból. Azonnali generálás, bármilyen terület.
Gyakran feltett kérdések
Összehasonlítás más formátumokkal
Kapcsolódó formátumok
Gyakran együtt exportálva
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