Python tools and SDK status

Repository tools, not a packaged public SDK. These commands are for developers with an ArrayBridge source checkout containing tools/scalar_maps and the checked-in USGS fixture. There is currently no supported pip install arraybridge workflow. A clean general installation and compatibility guarantee remain release gates.

Build and verify without a server

Use a dedicated Python environment. The qualified environment used Python 3.12; tools/scalar_maps/requirements.txt records the dependency pins used by the pilot. From the repository root:

python3.12 -m venv .venv-scalar-docs
. .venv-scalar-docs/bin/activate
python -m pip install -r tools/scalar_maps/requirements.txt

Use new destination directories: the commands refuse to overwrite an existing bundle.

python -m tools.scalar_maps build \
  tests/fixtures/scalar-map/usgs-crs/export-32.txt \
  tests/fixtures/scalar-map/usgs-crs/metadata-32.json \
  ./usgs-source-bundle

python -m tools.scalar_maps reproject \
  ./usgs-source-bundle ./usgs-mercator-bundle \
  --target-crs EPSG:3857 --resolution 100 --resampling nearest

python -m tools.scalar_maps verify ./usgs-source-bundle
python -m tools.scalar_maps verify ./usgs-mercator-bundle

Each command prints JSON containing asset identity, bundle revision, shape and missing-value count. For the retained 32×32 fixture and qualified dependency versions, the source has shape [32, 32]; the derived grid has shape [59, 46] with 104 missing samples. Version changes can affect derived grid/results and change representation identity; retain recorded versions rather than treating all future outputs as identical.

These operations need no login, generated gRPC code or running ArrayBridge service. Conversion preserves the original directory. Open either map.tif in QGIS or another GeoTIFF reader; retain its manifest and original bundle for provenance.

What each command does

Command	Inputs	Output
build	Regular X/Y/value text, metadata JSON, new destination	Original portable bundle
reproject	Original bundle, new destination, target CRS/resolution/resampling	Derived representation
verify	Original or derived bundle directory	Integrity/contract validation or an error

For original bundles, verification compares raster values and geometry with the retained numerical export. Derived verification checks the manifest identity, raster hash and declared geometry; it does not rerun the warp or independently establish source accuracy.

Extending a connector

Keep host capture, scientific conversion, authenticated publication and destination application separate. project_maps.py contains the current client/publisher integration; consumer_bridge.py adapts the project API to the local QGIS client. These modules are implementation references, not a versioned SDK compatibility promise. Network modules require generated arraybridge_pb2 bindings matching the deployed protocol and an operator-provisioned service.

Declare supported host versions, data types, directions, change detection, thread requirements and losses. Test retries, stale writes, exact historical reads, changed representation policies, missing values, CRS/units and permission removal. A released connector must include end-user setup/troubleshooting and developer contract documentation alongside its implementation.

Scalar-map schema · API semantics · Public exercise without a checkout.