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COMMUNICATING ELECTRONIC MAP DATA

  • US 20130136156A1
  • Filed: 10/10/2012
  • Published: 05/30/2013
  • Est. Priority Date: 11/24/2011
  • Status: Active Grant
First Claim
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1. :

  • A method of communicating electronic map data to a remote vehicle, comprising a first data processing terminal interfaced with a vehicle-borne map data processing terminal over a network connection, the method performed at the first data processing terminal comprising the steps of;

    compiling map data as at least one cell comprising a plurality of vector data records and a plurality of feature data records;

    compressing the compiled cell data;

    encrypting and digitally signing the compressed cell data; and

    transmitting the encrypted and digitally signed cell data over the network;

    characterised in that the step of compiling comprises the further step of reducing the respective bit length of a plurality of vector data values.

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