a photograph from the top
B. K. P. Horn has written: 'Final report, \\' -- subject(s): Computer vision, Planetary mapping, Photogelogy, Topgraphy, Photomapping, Stereophotography
Lines that are very close indicate a steep change in altitude. Far apart means a slow or gradual change.
The two primary requirements for karst topography are soluble rock, typically limestone, and sufficient rainfall to facilitate the chemical weathering process. The dissolution of the rock occurs as acidic water seeps through the soil, creating unique landforms such as sinkholes, caves, and underground rivers. These processes lead to the characteristic features of karst landscapes.