DTM and applied tiling scheme. (a): shaded MLA DTM of Mercury’s north pole at a resolution of 250 m pixel⁻¹. The map is displayed in gnomonic map projection centered at the north pole and color-coded by height. All units are in kilometers. (b): applied tiling scheme to derive temperatures for the DTM in (a). In total, 100 square tiles, each with a dimension of 200 × 200 km, make up the entire polar region of 2000 × 2000 km.