GeoJSON Sequences (Newline-delimited)
Open BetaGeoJSON-Seq er línuskipt afbrigði af GeoJSON þar sem hver lína er sérstakt fyrirbæri (Feature). Tilvalið fyrir streymi, atvikaskráningu og stórgagnaferli.
Helstu eiginleikar
Um GeoJSON-Seq-sniðið
GeoJSON-Seq (RFC 8142) is the same GeoJSON laid out line by line: one line is one whole feature. There is no common FeatureCollection wrapper, which means you do not have to read the entire file to get to the first feature.
This is a pipeline format. Such files are read line by line and processed as a stream: filtered with jq, fed to tippecanoe to build vector tiles, poured into Kafka or Spark, cut into pieces by line count. Memory usage does not depend on the size of the export.
The output is a single .geojsonl with the features of all the selected layers written one after another. Each has a _layer property with the name of its source layer, OpenStreetMap attributes are preserved, and coordinates are WGS84 (EPSG:4326) with six decimal places.
The format is good at exactly what ordinary GeoJSON is bad at on large volumes, and vice versa: you cannot put a .geojsonl straight into Leaflet — the lines are first assembled into a FeatureCollection or processed as a stream.
Hvaða forrit opnar GeoJSON-Seq-skrár
Eftirfarandi forrit geta opnað, breytt og unnið með GeoJSON Sequences (Newline-delimited) (.geojsonl) skrár sem fluttar eru út úr OSM2CDR:
Format specifications
- Open standard
- 3D coordinates supported
- Lossless (no quality loss)
- Stores feature attributes
- Output: 1 file
- RFC 8142 GeoJSON Text Sequences (newline-delimited). Streamable line-by-line — ideal for big-data pipelines and incremental loading.
Hverjir nota GeoJSON-Seq-kort
Hvernig á að flytja út GeoJSON-Seq
Hvernig á að opna eftir útflutning
- jq — jq -c 'select(.properties._layer=="roads")' map.geojsonl > roads.geojsonl filters out the layer you need without loading the file into memory.
- Tippecanoe — tippecanoe -o map.mbtiles map.geojsonl builds vector tiles: the line-based format is its native input.
- QGIS and ogr2ogr — GDAL reads GeoJSONSeq out of the box: ogr2ogr -f GPKG out.gpkg map.geojsonl.
- Python — read the file line by line and parse json.loads(line): memory does not depend on the volume; to bring the whole layer up, use geopandas.read_file("map.geojsonl").
- Splitting it up — an ordinary split -l 100000 map.geojsonl part_ gives valid pieces: every line is self-contained.
Vinsæl kort í GeoJSON-Seq
Fáðu kortaútflutning í GeoJSON Sequences (Newline-delimited)
Sæktu fagleg GeoJSON-Seq-kort úr OpenStreetMap. Tafarlaus kortagerð, hvaða svæði sem er.
Algengar spurningar
GeoJSON-Seq guides and tutorials
Tengd snið
Oft flutt út saman
Related Articles
GeoJSON-Seq (RFC 8142) format: streaming features — OSM export for big-data pipelines
GeoJSON-Seq (RFC 8142, 2017): stream of features, RS/LF delimiters, tippecanoe + BigQuery + Spark.
guideGeoJSON — Everything a Developer Needs to Know
Complete GeoJSON guide for developers: format structure, code examples with Leaflet, Mapbox and OpenLayers, getting data
guideGeoJSON: Complete Guide for Web Developers
What is GeoJSON, format structure, how to use with Leaflet and Mapbox, exporting OSM maps to GeoJSON.