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GeoJSON Sequences (Newline-delimited)

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.geojsonl · application/geo+json-seq

GeoJSON-Seqは、各行が個別のFeatureとなる、改行区切りのGeoJSONの一種です。ストリーミング、ログ記録、ビッグデータパイプラインに最適です。

今すぐGeoJSON-Seqをエクスポート ✨ オープンベータ — 無料、制限なし

主な機能

✓行区切り形式

✓ストリーム処理

✓シンプルなパース

✓ndjsonと互換

Example GeoJSON-Seq export (central Moscow, 1x0.5 km) — Example: central Moscow, ~1×0.5 km, medium detail

GeoJSON-Seqフォーマットについて

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.

GeoJSON-Seqファイルを開けるプログラム

次のプログラムおよびアプリケーションは、OSM2CDRからエクスポートしたGeoJSON Sequences (Newline-delimited)（.geojsonl）ファイルを開き、編集し、利用できます：

💻jq 💻ndjson-cli 💻Tippecanoe 💻GDAL/OGR 💻Python (json) 💻Node.js

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.

GeoJSON-Seq地図を利用するユーザー

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ストリーム処理

The file is read line by line, so memory does not depend on the size of the export.

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ビッグデータパイプライン

A ready input for Spark, Kafka and tippecanoe, where data comes as a stream of records.

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ロギング

Records are appended to the end and move on down the line as they arrive.

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jq／ndjson 処理

Every line is a self-contained JSON, so the usual command line utilities work with no adaptation.

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ETL ワークフロー

Splitting, filtering and loading in batches are done with standard tools, without intermediate conversions.

GeoJSON-Seqのエクスポート方法

範囲を選択

osm2cdr.ruのインタラクティブ地図上で長方形またはポリゴンを描画します

GeoJSON-Seqを選択

利用可能な127種類のエクスポートフォーマットの一覧からGeoJSON Sequences (Newline-delimited)を選択します

エクスポート

「エクスポート」をクリックすると、1〜5分で.geojsonlファイルを受け取れます

ダウンロード

完成したGeoJSON-Seqファイルをダウンロードし、jqで開きます

エクスポート後の開き方

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.

GeoJSON-Seqの人気地図

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