Abstract: Disclosed are methods and systems for downloading map data. A database of layers of map data is maintained. The map data may be representative of at least one map image of a geographic area. Each layer may provide progressively more detailed display information. Map data is downloaded to a client computer, and the may data may be sufficient to allow a user to navigate within a geographic area without requiring new map data to be downloaded.

Abstract: Disclosed are methods and systems for downloading map data. A database of layers of map data is maintained. The map data may be representative of at least one map image of a geographic area. Each layer may provide progressively more detailed display information. Map data is downloaded to a client computer, and the may data may be sufficient to allow a user to navigate within a geographic area without requiring new map data to be downloaded.

Abstract: Various methods and systems are disclosed for downloading geographical map data representative of at least one map image of a geographic area. In response to a request for map data, a subset of geographical map data is provided. The subset of geographical map data may be arranged into one or more minimal-sorted groups. The minimal-sorted groups may be used to restore the map data represented by the subset.

Abstract: Disclosed are methods and systems for downloading map data. A database of layers of map data is maintained. The map data may be representative of at least one map image of a geographic area. Each layer may provide progressively more detailed display information. Map data is downloaded to a client computer, and the may data may be sufficient to allow a user to navigate within a geographic area without requiring new map data to be downloaded.

Abstract: A method for doing business, wherein a web server maintains a commercial subscriber database including a plurality of records each containing data relating to commercial subscribers including at least name, address and category, and imposes a periodic subscription fee on at least some of the commercial subscribers. On receiving from a client machine connected thereto a request to download data relating to at least one specified category of commercial subscriber, it extracts from the commercial subscriber database respective records and sends to the client machine for display thereby, allows receipt of an update from one or more commercial subscribers in respect of substitute or supplementary data to that contained in the respective database record of the commercial subscribers, and updates the commercial subscriber database as required.

Abstract: A method for doing business, wherein a web server maintains a commercial subscriber database including a plurality of records each containing data relating to commercial subscribers including at least name, address and category, and imposes a periodic subscription fee on at least some of the commercial subscribers. On receiving from a client machine connected thereto a request to download data relating to at least one specified category of commercial subscriber, it extracts from the commercial subscriber database respective records and sends to the client machine for display thereby, allows receipt of an update from one or more commercial subscribers in respect of substitute or supplementary data to that contained in the respective database record of the commercial subscribers, and updates the commercial subscriber database as required.

Abstract: A method for doing business, wherein a web server maintains a commercial subscriber database including a plurality of records each containing data relating to commercial subscribers including at least name, address and category, and imposes a periodic subscription fee on at least some of said commercial subscribers. On receiving from a client machine connected thereto a request to download data relating to at least one specified category of commercial subscriber, it extracts from the commercial subscriber database respective records and sends to the client machine for display thereby, allows receipt of an update from one or more commercial subscribers in respect of substitute or supplementary data to that contained in the respective database record of the commercial subscribers, and updates the commercial subscriber database as required.

Abstract: A method for doing business, wherein a web server maintains a commercial subscriber database including a plurality of records each containing data relating to commercial subscribers including at least name, address and category, and imposes a periodic subscription fee on at least some of said commercial subscribers. On receiving from a client machine connected thereto a request to download data relating to at least one specified category of commercial subscriber, it extracts from the commercial subscriber database respective records and sends to the client machine for display thereby, allows receipt of an update from one or more commercial subscribers in respect of substitute or supplementary data to that contained in the respective database record of the commercial subscribers, and updates the commercial subscriber database as required.