Convert a bounded, contiguous row window of a columnar batch into a
protocol-neutral Result of typed features.
Features are emitted in batch row order, so the Result preserves the
batch's declared ordering exactly. Geometry becomes GeoJSON, the batch's
feature-id, timestamp, and dictionary columns become attributes under their
declared names, and a null timestamp or dictionary value becomes an explicit
null attribute rather than a missing key.
This direction is complete: a normative GeoArrow batch carries exactly those
four columns, so nothing on the batch is left behind and there is no loss to
report. Use columnarBatchToResultPages to walk more of a batch than
one window without raising the ceiling.
HonuaGeoArrowError row-limit-exceeded when the window exceeds
options.maxFeatures. The ceiling is checked before the batch is inspected,
so nothing is read or allocated on that path.
Throws
HonuaGeoArrowError unsupported-layout for xym/xyzm geometry,
which GeoJSON cannot represent.
Convert a bounded, contiguous row window of a columnar batch into a protocol-neutral Result of typed features.
Features are emitted in batch row order, so the
Resultpreserves the batch's declared ordering exactly. Geometry becomes GeoJSON, the batch's feature-id, timestamp, and dictionary columns become attributes under their declared names, and a null timestamp or dictionary value becomes an explicitnullattribute rather than a missing key.This direction is complete: a normative GeoArrow batch carries exactly those four columns, so nothing on the batch is left behind and there is no loss to report. Use columnarBatchToResultPages to walk more of a batch than one window without raising the ceiling.