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AssigneeQUALCOMM Incorporated
InventorZoltan Biacs
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Methods and apparatuses to generate and to access compressed and indexed elevations of Digital Elevation Models. In one aspect of the invention, a method to store elevation data includes: compressing elevation data of a first portion of a Digital Elevation Model (DEM) to generate first compressed elevation data; storing the first compressed elevation data in a storage location pointed to by a first index; and storing the first index. In another aspect of the invention, a method to retrieve elevation data includes: locating a first compressed portion of a Digital Elevation Model (DEM) using a first index; and decompressing the first compressed portion to retrieve first elevation data for at least one sample point in the Digital Elevation Model. The Digital Elevation Model has a plurality of compressed portions which includes the first compressed portion; and the first index points to a storage location where the first compressed portion is stored.
A method to retrieve elevation data, the method comprising:
A method to store elevation data, the method comprising:
A machine readable media containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method to retrieve elevation data, the method comprising:
A machine readable media containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method to store elevation data, the method comprising:
A digital processing system to retrieve elevation data, the digital processing system comprising:
A digital processing system to store elevation data, the digital processing system comprising:
A machine readable media containing a data stream representing a Digital Elevation Model, the data stream being produced by a method comprising:
Dependencies are inferred from the claim text.