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What this scene is
The rim and inner wall of North Ray crater, a 1 km fresh crater that Apollo 16 astronauts sampled in 1972, with bright boulder-strewn ejecta. 1.6 km across at 2 m, sharpened with 19 NAC photos.
1.6 km across, heights every 2.0 m, 359 m from lowest to highest point. 31% of the ground is steeper than 20°.
How close to the real Moon
- Lit like LRO photo M1297638087L, which was never used to build it, the scene's brightness correlates with the photo at r = 0.98 (stereo heights alone: 0.32).
- 19 photos sharpened the stereo heights by 0.23 m RMS. No independent height model is good enough to check that sharpening yet.
- Hills beyond the scene come from coarser elevation data reaching 2–23 km out; anything farther away cannot cast a shadow here.
- Rocks smaller than about 6 m are not in the data; North Ray's large boulders (House Rock is about 20 m) are.
- The browser exposes the view like a camera metering the sunlit ground, so on-screen brightness shows light and shadow, not absolute brightness.
Use it for your robot
Download the heightmap, albedo and 3D model above. For labelled training images of this place under any Sun, with depth, shadow and hazard masks, we render a dataset with the same terrain.
Credit: NASA/GSFC/Arizona State University (LROC); NASA GSFC LOLA team; NAIF SPICE. Method: docs/science/sim-scenes.md.