6 x 6 degree area imaged, then cropped tight on Tycho. Data taken from ldem_128.jp2 produced by the LOLA Science team. Stripes of data point to poles. http://astrosurf.com/eternity/temp/tychoT1mlarge.jpg is the best amateur (1 meter telescope) image.
In late 2015 the SLDEM was released that combined images from the Selene mission with the LRO elevation data for a 512 pixel per degree dataset. The stripes are gone.