@cityjson/cjconv-core

The engine-agnostic core of cjconv: format detection, column selection and the SQL that the cityjson DuckDB extension runs to convert between CityJSON, CityJSONSeq, FlatCityBuf, CityParquet packages and OBJ.

It contains no DuckDB binding. Supply an Engine (query and exec over SQL) backed by @duckdb/node-api, duckdb-wasm or anything else that has the cityjson extension loaded. For a ready-made Node API and CLI, use @cityjson/cjconv.

import { inspect, convert } from "@cityjson/cjconv-core";

const info = await inspect(engine, {
  kind: "file",
  format: "cityjsonseq",
  path: "delft.city.jsonl",
});
await convert(engine, {
  info,
  target: "flatcitybuf",
  selection: { lods: ["2.2"], attributes: [] },
  output: "delft.fcb",
});

MIT licensed.