About Global Morphologic Map at 100 meters per pixel

The WAC global mosaic is comprised of over 15,000 images acquired between November 2009 and February 2011. The WAC maps the whole Moon in one month, however the solar incidence angle at the equator changes about 28° from the beginning to the end of the month. To even out the incidence angle variations, the equatorial mosaic is comprised of data collected over three periods (1/20/2010 to 1/28/2010, 5/30/2010 to 6/6/2010, 7/24/2010 to 7/31/2010). The South Pole mosaic images were acquired 8/10/10 to 9/19/10 and the north polar images 4/22/10 to 5/19/10 (Table 1). Some gores were filled with data taken at other times. The non-polar images were map projected onto the GLD100 (WAC derived 100m/pixel DTM) while polar images were map projected on the LOLA shape model (80° to 90° N/S) and the GLD100 (60° to 80° N/S). In addition, the LOLA derived crossover corrected ephemeris and an improved camera pointing provide accurate positioning of each WAC image. Because the polar images were acquired at a different season than the equatorial images, and the lunar photometric function is not perfectly known, there is a brightness difference where the polar mosaics meet the equatorial mosaics. In a future release this discontinuity will be reduced.

The WAC global mosaic is archived in ten regional tiles at three different resolutions: 100 meters/pixel, 128 pixels/degree and 256 pixels/degree. Eight of the tiles are equirectangular projections that encompass 60° latitude by 90° longitude. In addition, two polar stereographic projections are available for each pole from 60° to the pole.