Lyle Brotherton and Scott Amos have worked together to develop the Shaven Raspberry Grid Reference Tool, to be used with all 1:50000 and 1:25000 scale maps. In the UK Ordnance Survey produce these maps in their Landranger and Explorer series. Traditionally compass roamers (or romers) have been used to measure grid references, but they are much less accurate and often difficult to use outdoors, especially in poor weather conditions. The Shaven Raspberry Grid Reference Tool removes these inaccuracies and difficulties in use with roamers (or romers). The Grid Reference Tool can be used to simply and accurately measure 6 figure grid references on 1:50000 maps and 8 figure grid references on 1:25000 maps (6 figure grids also if required).
With the increasing popularity of handheld GPS units from DeLorme, Eagle, Garmin, Satmap, Magellan, Suunto, NavTech, Trimble and Silva the accuracy they provide can be wasted if an individual fails to accurately plot on the map the grid reference given by the handheld GPS unit, the Shaven Raspberry Grid Reference Tool takes the guess work out of this, and improves accuracy. In order to use a GPS unit to navigate to a location, you will need to project a waypoint. To do this you will need to input a grid reference into your GPS unit: the Shaven Raspberry Grid Reference Tool enables you to take accurate grid References to be used as waypoints , allowing you to take advantage of the navigatial accuracy available to the GPS unit, and allowing you to navigate precisely to your desired location.