GeoJSON Sequences (Newline-delimited)
Open BetaGeoJSON-Seq is 'n reëlgeskeide variant van GeoJSON waar elke reël 'n afsonderlike Feature is. Ideaal vir stroom, logboeke en Big Data-pyplyne.
Sleutelkenmerke
Oor die GeoJSON-Seq-formaat
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.
Watter program open GeoJSON-Seq-lêers
Die volgende programme en toepassings kan GeoJSON Sequences (Newline-delimited) (.geojsonl)-lêers wat uit OSM2CDR uitgevoer is, open, redigeer en daarmee werk:
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.
Wie gebruik GeoJSON-Seq-kaarte
Hoe om GeoJSON-Seq uit te voer
Hoe om dit ná uitvoer te open
- 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.
Gewilde kaarte in GeoJSON-Seq
Kry GeoJSON Sequences (Newline-delimited)-kaartuitvoere
Laai professionele GeoJSON-Seq-kaarte van OpenStreetMap af. Onmiddellike generering, enige gebied.
Gereelde vrae
Verwante formate
Dikwels saam uitgevoer
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