Global NAC DTMs

The purpose of this dataset is to depict the geographic location of LROC Digital Terrain Models on the lunar surface and to quickly extract their corresponding information. Polygons were created from tracing the colorshade GeoTIFF products in ArcMap. The shapefile uses Moon_2000 geographic coordinate system and contains expanded error metrics compared to NAC DTM readmes.

Shapefile Field Descriptions:

  • resolution - DTM pixel scale (meters).
  • relat_le - Relative Linear Error. Vertical precision of the DTM, calculated at 90% confidence level by SOCET SET. Based on ground sampling distance, convergence angles, and image matching uncertainty (meters).
  • triang_rms - Triangulation RMS. Root mean square error of the multi-sensor triangulation performed by SOCET SET to align the images.
  • num_profil - Number of LOLA profiles used to register the DTM.
  • lola_avg - Mean Absolute Error compared to LOLA tracks.
  • lola_rms - RMS error compared to LOLA tracks.
  • adjust_rms - Adjusted RMS error of the final global registration used for LOLA offset calculations. A high adjusted RMS may indicate that the lat., lon., and elv. offsets may be larger than reported.
  • lat/lon/elv_offset - Offset from LOLA tracks in meters.
  • ln_jitter - Indicates the presence of jitter.
  • sam_jitter - Indicates the presence of jitter.
  • isis_vers - ISIS version used for image processing.
  • cov_sqkm - Coverage of DTM (km2).
  • conv_angle - Convergence angle between the images in the stereo pair.
  • num_stereo - Number of stereo pairs used to create DTM.

For more information, refer to: Henriksen, M. R., Manheim, M. R., Burns, K. N., Seymour, P., Speyerer, E. J., Deran, A., Boyd, A. K., Howington-Kraus, E., Rosiek, M. R., Archinal, B. A., and Robinson, M. S. (2017). Extracting accurate and precise topography from LROC narrow angle camera stereo observations. Icarus, 283, 122-137.

Global NAC DTMs Shapefile