As a developer applying for planning permission, it is important that you have maps or a map of the location you are planning to develop that is correct and accurate. This is essential in ensuring that you fully understand the boundaries and space you have to work with even as you apply for permission. With so many map makers in Britain, finding a map you can rely on can be hard. As such, it is essential that you get your map from a reliable map maker. Ordnance Survey is Britain’s national mapping agency and is one of the largest producer of maps copyright Promap in the world.