초록 ▼

A system and method for acquiring differentially corrected GPS data for forming a digital database of road geometry in a geographic region. A vehicle having a GPS receiver and a DGPS demodulator located therein is driven on roadways in the geographic region. The GPS receiver receives standard GPS si

A system and method for acquiring differentially corrected GPS data for forming a digital database of road geometry in a geographic region. A vehicle having a GPS receiver and a DGPS demodulator located therein is driven on roadways in the geographic region. The GPS receiver receives standard GPS signals and the DGPS demodulator receives DGPS signals which are used to correct the standard GPS signals. The corrected GPS signals are stored where they can be processed to create a digital database. Alternately a GPS receiver is positioned at a stationary location along with a portable DGPS demodulator. A vehicle having a GPS receiver located therein is driven on roadways in the geographic region. The GPS receiver at the stationary location is continuously operated and the DGPS demodulator is operated once to receive a DGPS signal. The DGPS demodulator can then be moved to another geographic region. The GPS receiver in the vehicle is operated as the vehicle is being driven and the GPS receiver receives standard GPS signals. The standard GPS signals from the GPS receiver at the stationary location can be used to correct the standard GPS signals received by the GPS receiver in the vehicle.

대표청구항 ▼

[ We claim:] [1.] A system for acquiring data for forming a digital database of road geometry in a geographic region, the system comprising:a land-based vehicle for traveling on roads;a receiver mounted in the land-based vehicle wherein the receiver, when operated during a data gathering sequence, a

[ We claim:] [1.] A system for acquiring data for forming a digital database of road geometry in a geographic region, the system comprising:a land-based vehicle for traveling on roads;a receiver mounted in the land-based vehicle wherein the receiver, when operated during a data gathering sequence, acquires Global Position System (GPS) signals transmitted from a plurality of satellites;a demodulator mounted in the land-based vehicle and coupled to the receiver wherein the demodulator receives differential global position system (DGPS) signals from a differential global position system when the demodulator is operated during the data gathering sequence, wherein each GPS signal is corrected by a DGPS signal to create differentially corrected GPS data; anda memory that stores each of the corrected GPS data.