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Polygon FlatGeobuf Baseline

vectorFlatGeobufPolygonEPSG:4326tinybundled

Canonical baseline polygon stored as FlatGeobuf to exercise compact spatial indexing and binary feature transport.

Polygon geometry of polygon_flatgeobuf_baseline, rendered from the case's data
Polygon geometry, rendered from the case's actual geometry. Scale is normalized to the viewport and is not comparable between cases.
Property Value
Case ID polygon_flatgeobuf_baseline
Category vector
Format FlatGeobuf
Geometry type Polygon
CRS EPSG:4326
Location Central Europe (synthetic) — 10.00°E, 50.00°N → 11.00°E, 51.00°N
Test tier unit
Size class tiny
Storage class bundled
Redistributable yes
Loader geopandas
Status validated

Use this case

import pytest


@pytest.mark.geocase_case("polygon_flatgeobuf_baseline")
def test_polygon_flatgeobuf_baseline(geocase_case) -> None:
    data = geocase_case.load()
    assert data is not None

Use GeoCase in your tests

Install the complete set of vector, raster, and NetCDF dependencies:

pip install "geocase[all]"

View GeoCase on PyPI.

What this case checks

Provide a canonical polygon encoded as FlatGeobuf so binary driver-backed loading can be compared against the GeoJSON baseline.

Risk types covered

Expected behavior

Assertion Expected
expect_loadable yes
expect_valid_geometry yes
expect_crs yes
expected_epsg 4326
expected_geometry_types Polygon

Notes

Purpose

Canonical baseline polygon stored in FlatGeobuf for cross-format driver coverage.

Data

  • Geometry: POLYGON ((10 50, 11 50, 11 51, 10 51, 10 50))
  • Attributes: id = 1, name = polygon_flatgeobuf_baseline
  • Feature count: 1

Validation

  • Geometry type: Polygon
  • CRS: EPSG:4326
  • Geometry equals simple_valid_polygon under shapely.normalize, which is how tests/unit/test_cross_format_canonical.py compares them. The comparison is winding-insensitive by necessity: the Shapefile specification mandates the opposite ring orientation from RFC 7946, and OGR rewrites winding on write. Orientation itself is asserted by shapefile_ring_orientation.

Generation

Generated by scripts/generate_vector_fixtures.py — do not hand-edit. The geometry is derived from params.canonical_source_case_id (simple_valid_polygon), and generate_vector_fixtures.py --check fails on any drift.

Required capabilities

  • load
  • geometry-validation
  • bounds-check

Files

Browse this case on GitHub

Source and license

  • Source: geocase-curated
  • License: MIT

Tags

baseline cross_format_canonical flatgeobuf format_comparison polygon valid vector