WAC Color Shaded Relief

The WAC Color Shaded Relief relief map was created from the Global Lunar Digital Terrain Model 100 m pixel scale (GLD100 Scholten et al, 2012; from 79 degrees S latitude to 79 degrees N latitude) and the LOLA 30-m gridded DTM downsampled to 100 meters/pixel (Smith et al., 2010; +/- 79 degrees latitude to the poles). Shading was created by illuminating the surface from a given Sun direction and elevation. To convey an absolute sense of height, the shaded relief grayscale pixels were colored to represent elevation (relative to the mean lunar radius of 1737400 meters). Thirty-four discrete color bins were selected to emphasize topographic landforms. Binning of the elevations for each color was based a global elevation histogram, with middle elevations having smaller bins (320 m of elevation) and elevation extremes with larger bins (720 m). The Color Shaded Relief map is available at 100 meters per pixel and 128 pixels per degree in the same tiled format as the GLD100 (eight equirectangular equatorial tiles and a single tile for each pole), as well as in global files at lesser resolutions. All of the Color Shaded Relief products are available with and without latitude and longitude grids (10 degree increments).

Naming schemes for WAC Color Shaded Relief products consist of four main parts:

  1. WAC_CSHADE: Identifies a product as being a WAC Colorshaded Relief product
  2. A 9 Character Identifier:
    • E|P|O for the Projection (E for Equirectangular, P for Polar Stereographic, or O for Orthographic)
    • 3 digits for Center Latitude in degrees x 10
    • N or S indicates wheter Center Latitude is northern or southern
    • 4 digits for Center Longitude in degrees x 10
  3. Pixel Scale: 3 digits followed by M for meters/pixel or P for pixels/degree.
  4. (Optional) GRID: Indicates if this is a gridded product, with latitude and longitude grids in 10 degree increments.

Latitude and Longitude Ranges:

Product Projection Latitude Range Longitude Range
E000N0000 Equirectangular -90° to 90° 0° to 360°
E300N0450 Equirectangular 0° to 60° 0° to 90°
E300N1350 Equirectangular 0° to 60° 90° to 180°
E300N2250 Equirectangular 0° to 60° 180° to 270°
E300N3150 Equirectangular 0° to 60° 270° to 360°
E300S0450 Equirectangular -60° to 0° 0° to 360°
E300S1350 Equirectangular -60° to 0° 90° to 180°
E300S2250 Equirectangular -60° to 0° 180° to 270°
E300S3150 Equirectangular -60° to 0° 270° to 360°
O000N0000 Orthographic -90° to 90° 270° to 90°
O000N0600 Orthographic -90° to 90° 330° to 120°
O000N1200 Orthographic -90° to 90° 30° to 210°
O000N1800 Orthographic -90° to 90° 90° to 270°
O000N2400 Orthographic -90° to 90° 150° to 330°
O000N3000 Orthographic -90° to 90° 210° to 30°
O900N0000 Orthographic 0° to 90° 0° to 360°
O900S0000 Orthographic -90° to 0° 0° to 360°
P900N0000 Polar Stereographic 60° to 90° 0° to 360°
P900S0000 Polar Stereographic -90° to 60° 0° to 360°

When citing this product, use the following references:

Scholten, F., Oberst, J., Matz, K. D., Roatsch, T., Wählisch, M., Speyerer, E. J., & Robinson, M. S. (2012). GLD100: The near-global lunar 100 m raster DTM from LROC WAC stereo image data. Journal of Geophysical Research: Planets, 117(E12). doi:10.1029/2011JE003926

Smith, D. E., Zuber, M. T., Neumann, G. A., Lemoine, F. G., Mazarico, E., Torrence, M. H., McGarrey, J. F., Rowlands, D. D., Head, J. W., Duxbury, T. H., Aharonson, O., Lucey, P. G., Robinson, M. S., Barnouin, O. S., Cavanaugh, J. F., Sun, X., Liiva, P., Mao, D., Smith, J.C., & Bartels, A. E. (2010). Initial observations from the lunar orbiter laser altimeter (LOLA). Geophysical Research Letters, 37(18). doi:10.1029/2010GL043751

WAC Color Shaded Relief

Legend

Wac_cshade_legend

100 meters/pixel - Grid

Wac_cshade_p900n0000_100m_grid Wac_cshade_p900s0000_100m_grid
Wac_cshade_e300n2250_100m_grid Wac_cshade_e300n3150_100m_grid Wac_cshade_e300n0450_100m_grid Wac_cshade_e300n1350_100m_grid
Wac_cshade_e300s2250_100m_grid Wac_cshade_e300s3150_100m_grid Wac_cshade_e300s0450_100m_grid Wac_cshade_e300s1350_100m_grid

100 meters/pixel - No Grid

Wac_cshade_p900n0000_100m Wac_cshade_p900s0000_100m
Wac_cshade_e300n2250_100m Wac_cshade_e300n3150_100m Wac_cshade_e300n0450_100m Wac_cshade_e300n1350_100m
Wac_cshade_e300s2250_100m Wac_cshade_e300s3150_100m Wac_cshade_e300s0450_100m Wac_cshade_e300s1350_100m

128 pixels/degree - Grid

Wac_cshade_p900n0000_128p_grid Wac_cshade_p900s0000_128p_grid
Wac_cshade_e300n2250_128p_grid Wac_cshade_e300n3150_128p_grid Wac_cshade_e300n0450_128p_grid Wac_cshade_e300n1350_128p_grid
Wac_cshade_e300s2250_128p_grid Wac_cshade_e300s3150_128p_grid Wac_cshade_e300s0450_128p_grid Wac_cshade_e300s1350_128p_grid

128 pixels/degree - No Grid

Wac_cshade_p900n0000_128p Wac_cshade_p900s0000_128p
Wac_cshade_e300n2250_128p Wac_cshade_e300n3150_128p Wac_cshade_e300n0450_128p Wac_cshade_e300n1350_128p
Wac_cshade_e300s2250_128p Wac_cshade_e300s3150_128p Wac_cshade_e300s0450_128p Wac_cshade_e300s1350_128p

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