This application demonstrates how GeoConcept Internet Server can be used to create a location statement. It may for example be used by companies wanting to understand where a tracked vehicle is located, or to identify the nearest service, or for environmental analysis.

The URL can return any information known about the objects that are found; In this case the class, Subclass, Name, Object type, NavtechID, Postcode sector, locality, distance of the object to point, x, y ,x1, y1, length, area of selectable objects on the map that are within a distance XgoPrecision of the coordinates XgoXcoord and XgoYcoord. We put in the xy's so that if you knew the heading of a vehicle you could guess which direction the vehicle was going and hence which road it was most probably on, since there are some real world errors to be taken account of. This example can use coordinates that can be either in the map projection, in this case the British National Grid, or in Longitute/Latitude. XgoCoordType=DEC for decimal long/lat, MAP for grid coordinates. If the value of XgoAnswer is set to Bitmap rather than GetVar, the application will display a map, centered on the coordinates supplied and covering a radius of XgoPrecision meters. The map data is NavTech data within the M25 and the number of objects returned is limited to 50.

GeoConcept uses a proprietary object oriented database. This database is optimised to perform spatial queries. Not only is the database fast in returning a list of objects that it has found, it can also calculate the distance from the nearest part of the object to the query point.GeoConcept can import data in most GIS formats and is Open GIS compliant. A user can decide which objects can be reported on by making them selectable.

To look at the results click on the icon below. You can modify the parameters on the URL to search in different parts of the map, to vary the precision and to request either a list of objects or a map.



For more details on MapMechanics and GeoConcept see


©Kingswood Ltd 2005