NAVTEQ USA

Navteq Megamap USAIn the framework of Megamap Project, processing of 3 million kilometres intercity road network, covered 25 states of the US has been implemented. The topography of states and roadway density were different.

NAVTEQ USA
The customer NAVTEQ has provided the digital orthophotos with 1 m / pixel resolution covering the elaborated area and scanned geo-referenced topographic maps on the scale of 1: 24 000. Digital orthophotos were the primary sources for re-positioning and digitizing of all road geometry. Using the two sources, all roads, motorable by car and jeep, have been digitalised. Furthermore, railroads, administrative boundaries (state, county) and cartographic features (national, state and city parks, native reservations, cemeteries etc.) have been also digitalised.

The developed technology is proposed for execution of vehicle navigation database building, which requires the record of widespread road network with the help of different data sources in the long run and high quality. The technology provides a cost-effective solution to these tasks.

The created database has been used to correct geographic location of roads, to extend content of navigation database carried out by the NAVTEQ linking extending attributes to the new elements by semi-automated process from the earlier database. The NAVTEQ carries out further data verification and updating based on its continuous field check.