The rich variety of life in the greater M-KMA ecosystem is shaped in large part by the variety of the physical landscape. The physical landscape includes topography (elevation, slope, and aspect), bedrock and surface geology, macro land form, and major aquatic elements—collectively called “enduring features”. It is the template upon which Earth’s living skin develops, and upon which organisms grow,diversify and combine, creating different ecosystems.
The enduring features model was developed to quantify landscape structure and support an assessment of the rarity and variety of physical signatures within the study area and its physiographic sub-provinces. Additional spatial analyses summarized the physical "skeleton" of each physiographic subprovince, or said differently the common physical signatures.