06321158 is referenced by 977 patents and cites 9 patents.

An Integrated Routing/Mapping Information System (IRMIS) links desktop personal computer cartographic applications to one or more handheld organizer, personal digital assistant (PDA) or “palmtop” devices. Such devices may be optionally equipped with, or connected to, portable Global Positioning System (GPS) or equivalent position sensing device. Desktop application facilitates user selection of areas, starts, stops, destinations, maps and/or point and/or route information. It optionally includes supplemental online information, preferably for transfer to the PDA or equivalent device. Users' options include route information, area, and route maps. Maps and related route information are configured with differential detail and levels of magnitude. Used in the field, in conjunction with GPS receiver, the PDA device is configured to display directions, text and map formats, the user's current position, heading, speed, elevation, and so forth. Audible signals identifying the next turn along the user's planned route are also provided. The user can pan across maps and zoom between two or more map scales, levels of detail, or magnitudes. The IRMIS also provides for “automatic zooming,” e.g., to show greater detail or closer detail as the user approaches a destination, or to larger scale and lower resolution to show the user's overall planned route between points of interest. The IRMIS also enables the user to mark or record specific locations and/or log actual travel routes, using GPS position information. These annotated location marks and/or “breadcrumb” or GPS log data can be saved, uploaded, displayed, or otherwise processed on the user's desktop geographic information or cartographic system. The IRMIS application and data may be distributed online and/or in tangible media in limited and advanced manipulation formats.

Title
Integrated routing/mapping information
Application Number
9/144836
Publication Number
6321158 (B1)
Application Date
August 31, 1998
Publication Date
November 20, 2001
Inventor
Keith A Moulton
Portland
ME, US
Gordon Autry
Standish
ME, US
Keith A Gray
Yarmouth
ME, US
David M DeLorme
Yarmouth
ME, US
Agent
Patrick R Scanlan
US
Chris A Caseiro
US
Peirce Atwood
US
Assignee
DeLorme Publishing Company
ME, US
IPC
G01C 21/30
View Original Source