Scanned plates (350dpi resolution TIFFs) of rare Heilongjiang Atlas, published in 1911, from the copy in the Harvard Yenching Library collection. These images are not georeferenced for use in GIS. Sca
The Digital Terrain Model (DTM) depicts the surface without construction in 2021. It is calculated from the height model of the official survey. The DTM is visualised here with slanted light shading (
