A mapping solution for GPS/GIS in Kingston, Jamaica

This work explores the implementation of an algorithm that correlates coordinates expressed in longitude and latitude with a coordinate system specific to Jamaica. Using available information of the road network the GPS results obtained from a vehicle equipped with a GPS receiver and a GSM modem is corrected to fit on a road segment in the network. The national coordinate of Jamaica, JAD69, was used to project the data. JAD69 is based on a Clarke ellipsoid. However, few GPS receivers are compatible with the JAD69 coordinate system therefore a datum shift results and a transformation formula has to be employed to have the two systems agree. The algorithm will incorporate the inaccuracy of the map and the GPS receiver to provide the level of accuracy sufficient to ensure that a vehicle´s detected location will correspond to the digitized representation of the road on which the vehicle is traveling.