Siteplan If you are planning a home extension or carrying out a small building project, you will probably need to apply for planning permission from your local authority. Superplan Data By putting your focal point at the centre of the map, you see your site relative to the surrounding area, and you only pay for the area you want. (200m by 200m available via online ordering) Landplan Landplan is the map of choice for site location, farm or estate management, and identifying land use at 1:10 000 scale.