1. A method in a computing environment for determining land cover classification, the method comprising: identifying, by a computing system having a processor and memory, multiple geographic units, wherein each of the geographic units corresponds to one of multiple areas on the surface of the earth; for each of the multiple geographic units: determining, by the computing system, a human presence datum that is an indication of human occupancy on the corresponding area on the surface of the earth; determining, by the computing system, at least one of an environmental datum that is an indication of an environmental aspect of the corresponding area on the surface of the earth, and a cultural datum that is an indication of a cultural aspect of the corresponding area on the surface of the earth; assigning, by the computing system, a land cover classification to the geographic unit based on at least the human presence datum and (a) the environmental datum, (b) the cultural datum, or (c) both (a) and (b); storing, by the computing system, the assigned land cover classifications in association with the multiple geographic units.