Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2005-06-01
2010-02-16
Pannala, Sathyanarayan (Department: 2164)
Data processing: database and file management or data structures
Database design
Data structure types
C709S203000, C348S014100
Reexamination Certificate
active
07664764
ABSTRACT:
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.
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Pannala Sathyanarayan
Parekh Shyam K.
QUALCOMM Incorporated
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