Patent ID: 9123183
Filing Date: 2015-09-01
Classification: G06T

Abstract:
1. A method, comprising: accessing, by a device, a first structure comprising a plurality of first elevation values and a plurality of location identifiers that identify corresponding locations in a geographic region at a first resolution, the first elevation values identifying elevations in a first elevation layer in the geographic region at respective locations, wherein each first elevation value corresponds to one of the location identifiers; accessing, by the device, a second structure that identifies a second elevation layer in the geographic region that differs from the first elevation layer; determining, based on the second structure, second elevation values at the first resolution that identify elevations in the second elevation layer at locations that correspond to at least some of the plurality of location identifiers, wherein at least some of the second elevation values differ from first elevation values that correspond to the same location identifiers; and generating a multi-layer digital elevation model (DEM) structure that includes the first elevation values and the second elevation values in association with corresponding location identifiers.