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Systems and methods for a PDA with forced layer switching based on memory constraints

  • US 6,694,256 B1
  • Filed: 10/11/2002
  • Issued: 02/17/2004
  • Est. Priority Date: 12/20/2001
  • Status: Active Grant
First Claim
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1. A personal digital assistant (PDA), comprising:

  • a calendar function;

    an address book function;

    a processor operable to communicate with a memory, the memory having cartographic data including any number of locations and data indicative of thoroughfares of a plurality of types connecting certain ones of the locations;

    wherein the plurality of thoroughfares are organized in a hierarchy of detail levels; and

    wherein the processor operates on a route calculation algorithm to find a path between any two of the number of locations, and wherein the route calculation algorithm forces switching between different levels in the hierarchy of detail levels based on a set of criteria.

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