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GeoTIFF External Overviews Small

rasterGeoTIFFEPSG:32633tinybundled

A single-band uint8 GeoTIFF whose overviews live in a sibling .ovr sidecar rather than inside the primary file. Exercises external-overview detection and sidecar handling.

Pixels of geotiff_external_overviews_small, a 64x64 raster, with NoData in magenta
1 band, 64x64 px, uint8. Rendered from the case's actual pixels, contrast-stretched for display; NoData is shown in magenta.
Property Value
Case ID geotiff_external_overviews_small
Category raster
Format GeoTIFF
CRS EPSG:32633
Location Southern Italy / Sicily (synthetic, UTM 33N) — 15.00°E, 40.65°N → 15.01°E, 40.65°N
Test tier integration
Size class tiny
Storage class bundled
Redistributable yes
Loader rasterio
Status validated

Use this case

import pytest


@pytest.mark.geocase_case("geotiff_external_overviews_small")
def test_geotiff_external_overviews_small(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

Confirm GeoCase reads external .ovr overviews transparently and treats the sidecar as part of the case.

Risk types covered

Expected behavior

Assertion Expected
expect_loadable yes
expect_crs yes
expected_epsg 32633
expected_band_count 1
expected_dtype uint8
expected_shape [64, 64]
expected_compression deflate
expected_overviews yes

Known answer

Computed from the actual bytes and gated against them. Grade your own output against these.

Quantity Value
NoData pixels 0
Bounds (case CRS) [500000.0, 4499360.0, 500640.0, 4500000.0]

Required capabilities

  • load
  • overview-check

Files

Browse this case on GitHub

Source and license

  • Source: geocase-synthetic
  • License: MIT

Tags

delivery:external-overviews geography:utm geotiff overviews product:cog raster