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DEM NaN NoData Small

rasterGeoTIFFEPSG:32633tinybundled

A float32 DEM that marks NoData with NaN rather than a sentinel value. NaN propagates through means and comparisons instead of being excluded.

Pixels of dem_nan_nodata_small, a 16x16 raster, with NoData in magenta
1 band, 16x16 px, float32, nan NoData. Rendered from the case's actual pixels, contrast-stretched for display; NoData is shown in magenta.
Property Value
Case ID dem_nan_nodata_small
Category raster
Format GeoTIFF
CRS EPSG:32633
Location Southern Italy / Sicily (synthetic, UTM 33N) — 15.00°E, 40.65°N → 15.00°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("dem_nan_nodata_small")
def test_dem_nan_nodata_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 detects NaN-encoded NoData in a float DEM rather than treating NaN as valid elevation.

Risk types covered

Expected behavior

Assertion Expected
expect_loadable yes
expect_crs yes
expected_epsg 32633
expect_nodata yes
expected_band_count 1
expected_dtype float32
expected_shape [16, 16]
nodata_convention nan
expected_compression deflate
expected_band_names elevation

Known answer

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

Quantity Value
Mean over valid pixels 110.0
Mean including NoData 110.0
NoData pixels 2
Bounds (case CRS) [500000.0, 4499840.0, 500160.0, 4500000.0]

Required capabilities

  • load
  • nodata-check
  • nan-nodata-check

Files

Browse this case on GitHub

Source and license

  • Source: geocase-synthetic
  • License: MIT

Tags

delivery:single-file dem geography:utm geotiff product:dem raster