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moonTerrain fingerprint

Connecting Ridge ↔ Holuhraun, Iceland

Terrain analog pilot for Connecting Ridge; radar comparison not completed. candidate window identified by this search.

Connecting Ridge hillshade, tile 0/0/0
MoonConnecting Ridge
Holuhraun, Iceland hillshade, tile 10/464/266Holuhraun, Iceland hillshade, tile 10/464/267Holuhraun, Iceland hillshade, tile 10/465/266Holuhraun, Iceland hillshade, tile 10/465/267
EarthHoluhraun, Iceland

Derived Computed from named observations by a documented transformation Bundle hillshade tiles (45° altitude, 315° azimuth); the outline marks each 5 km analysis window.

Terrain relief

Derived Computed from named observations by a documented transformation

0.6785RMS of log nu

Closer than 96% of background windows

Terrain texture

Derived Computed from named observations by a documented transformation

0.6585RMS of log nu

Closer than 97% of background windows

How to read this

Each distance compares the two windows in its own units; lower is more similar. Families are never summed or ranked together.

Not compared on this card: Radar CPR (earth radar fingerprint not built), Model embedding (encoder not evaluated).

What it could help investigate
Assumed Scenario input, tolerance or unverified physical simplification

Assumed: candidate window identified by this search. Its terrain relief distance (0.6785) exceeds the target's distance to every other window of its own site (max 0.4366), so it is not a close neighbour in this metric. It is not a close neighbour of the lunar target on the supported descriptors (terrain_relief, terrain_texture); this is an interpretation to test, not a measured result.

Proposed field test
ProposedAssumed Scenario input, tolerance or unverified physical simplification

Proposed, not yet carried out: survey a surface patch in this Earth window with a clast-size and coverage distribution, material and moisture notes, and calibrated radar observations under controlled geometry. Dimensions and sampling would be chosen for the sensor and site; none of these measurements has been made.

Scope of this card
  • candidate window identified by this search; not a proven analog
  • Copernicus GLO-30 heights are a digital surface model including vegetation and buildings, referenced to EGM2008 (PRD 5)
  • terrain distances only; radar comparison not completed (shipping mode C)
  • the encoder is EXPERIMENTAL and not used in any ranking
  • WorldCover v200 2021 land-cover mask, nearest class at 90 m centres (ANA-05 default)
  • PGDA78 clone measurement error is propagated for the lunar target window only (clone counts in uncertainty_components); no Earth DEM error model is applied. Terrain ties use matching.tie_groups with each candidate's clone spread (half the 2.5-97.5 percentile range of its distance), measurement error only.
  • Mode C: radar comparison not completed. The radar inputs were not qualified within the pilot, so no radar distance or radar signature is part of this card.
  • The encoder is EXPERIMENTAL (G5 FAIL) and takes no part in any ranking; its distance, if shown, is Predicted.
  • Field confirmation is future work; similarity here does not establish block sizes, soil strength, buried structure or low-gravity mobility (PRD 3).
  • Its terrain relief distance (0.6785) exceeds the target's distance to every other window of its own site (max 0.4366), so it is not a close neighbour in this metric.
Figure A
Location maps: the Earth polygon and the lunar target window, each with a scale bar
Location maps: the Earth polygon and the lunar target window, each with a scale bar
Figure B
nu(L) on log-log axes for the target and the Earth window, relief and texture
nu(L) on log-log axes for the target and the Earth window, relief and texture
Figure C
Radar block distributions with band labels, or the reason they are unavailable
Radar block distributions with band labels, or the reason they are unavailable

Earth window earth-utm27n-e285-n2879 (holuhraun; EPSG:32627, UTM zone 27N) compared with the lunar target window moon-sps-x2-y2 of Connecting Ridge (PGDA78 Site01) (south polar stereographic (product CRS)), each a 5000 m window on a 90 m analysis grid. Mode C.

Target moon-sps-x2-y2

polar_stereographic · 5 vertices

Full CRS

PROJCS["unnamed",GEOGCS["unnamed ellipse",DATUM["unknown",SPHEROID["unnamed",1737400,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",-90],PARAMETER["central_meridian",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1],AXIS["Easting",NORTH],AXIS["Northing",NORTH]]

Earth earth-utm27n-e285-n2879

utm · EPSG:32627 · zone 27N · 5 vertices

Full CRS

EPSG:32627

Bundle 2026-11-15T0456Z-7e3c74cRun sha256:7d36a81e9e101696f0cea5ab51569b03e03872f877b720a3f5c288ad10d67324Card moon-sps-x2-y2__earth-utm27n-e285-n2879