About GPS





Auto Buff Guy (Navigator Garmin …): When I was looking for a GPS navigator, I had family travels and business purposes in mind. After som…

About "Tritons" and not only . Part 2

Friday 28 October 2011 at 11:35 am

navigator magellan GPS vector mapMany people know that maps for GPS-navigators can be vector and raster, but not everyone can explain how they differ.
A vector map can be observed only in navigator or computer screen. Actually it is just object list of terrain with coordinates. For example, a bus stop is a point with coordinates and an icon with bus, road is a line with coordinates of every it’s bend, wood is a list of coordinates of the line contouring a large forest called polygon.

This map looks angularly enough, but it is possible to change its scale in very wide limits. Big cities and main highways are shown only in a small scale, quarters, streets with titles and houses with numbers appear at scale increasing.