{
  "$type": "site.standard.document",
  "description": "The present invention relates to methods and apparatuses to generate compressed and indexed elevations of Digital Elevation Models. The invention provides a method to store elevation data, which includes the steps of compressing elevation data of a first portion of a Digital Elevation Model (DEM)…",
  "path": "/patents/1067170",
  "publishedAt": "2006-05-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/005",
    "QUALCOMM INC [US]"
  ],
  "textContent": "The present invention relates to methods and apparatuses to generate compressed and indexed elevations of Digital Elevation Models. The invention provides a method to store elevation data, which includes the steps of 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. The invention also provides a machine readable media containing executable program instruction which when executed by a digital processing system cause said system to store elevation data according to the above method. The invention further provides a digital processing system to store elevation data and a machine readable media containing a data stream representing a Digital Elevation Model.",
  "title": "Method and system for storage and fast retrieval of digital terrain model elevations for use in positioning systems"
}