dwg2geo 0.2.1

Convert engineering DWG drawings to auditable GeoJSON (pure-Rust, no CAD software needed)

dwg2geo (Python)

Convert engineering DWG drawings to GeoJSON from Python — the pure-Rust dwg2geo converter as a native extension. No AutoCAD, no LibreDWG, no GDAL needed.

pip install dwg2geo

import json
import dwg2geo

result = dwg2geo.convert_file("drawing.dwg")           # or dwg2geo.convert(raw_bytes)
fc = json.loads(result["geojson"])                     # GeoJSON FeatureCollection (local drawing coords)

print(result["feature_count"], "features")
print(result["converted"])                             # per-entity-type counts
print(result["skipped"], result["failed"])             # with reasons — auditable

Options: convert(data, polygonize_closed=False, curve_tolerance=None).

The result dict mirrors dwg2geo's EmbedResult:

key	meaning
geojson	FeatureCollection string in the drawing's local coordinates
feature_count, model_space_entities	totals
converted / skipped / failed	per-entity-type outcomes with reasons
warnings	conversion warnings
bbox	[minx, miny, maxx, maxy] or None
source_sha256	hash of the input bytes (audit trail)

Features carry resolved CAD style metadata (layer, color_rgb, color_index, linetype, lineweight_mm, text properties…). Coordinates are local — georeference with e.g. pyproj using the drawing's known CRS; dwg2geo never guesses one:

from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:31983", "EPSG:4326", always_xy=True)
lon, lat = transformer.transform(x, y)

Deterministic: the same bytes always produce byte-identical GeoJSON on a given platform (across platforms — native vs WebAssembly — a few floating-point values may differ in the last digit).

License: MIT.