LUNAR TERRAIN READING NOTE
Purpose: Compare a lunar image and terrain product while preserving scale and uncertainty.
Guide: https://yenra.com/wiki/Moon_topography/
Map: https://quickmap.lroc.asu.edu/
Product documentation: https://pds-geosciences.wustl.edu/missions/lro/lola_faq.htm

1. Locate a named feature; verify the map's coordinate convention.
2. Record the terrain layer and reference surface before reading elevations.
3. Compare imagery and terrain at the same extent; record illumination separately.
4. If supported, record a profile across selected points. Otherwise use documented point elevations.
5. Keep the view link and product label so the comparison can be repeated.

Feature:
Review date:
Map/view link:
Dataset and version:
Latitude/longitude and east/west convention:
Projection/reference surface:
Grid spacing, measurement coverage and stated uncertainty:
Image illumination/observation date:
Profile endpoints and distance units:
Rim elevation (m):
Floor elevation (m):
Horizontal separation (m):
Relief = rim elevation minus floor elevation (m):
Average slope percent = 100 * abs(relief) / horizontal separation:
Average slope degrees = atan(abs(relief) / horizontal separation), converted to degrees:
Vertical exaggeration of displayed profile:
Unresolved local terrain and other limitations:

INVENTED EXAMPLE, NOT A REAL CRATER:
Rim -1200 m; floor -3000 m; horizontal separation 6000 m.
Relief 1800 m; ratio 0.30; average slope 30 percent or about 16.7 degrees.
Use the same elevation reference and consistent units for both endpoints.
Average endpoint slope can hide a much steeper local scarp.
This educational exercise establishes no landing or vehicle capability.