# RPCCode

This enumeration is used in association with the rpc/RPC attribute. This enumeration identifies the accuracy value of the coordinates allocated to the address.

<table><thead><tr><th width="101">Value</th><th width="145">Description</th><th>Implementation notes</th></tr></thead><tbody><tr><td>1</td><td>Central Internal Position</td><td><p>The address seed is <strong>contained within</strong> an OS MasterMap Topography Layer <strong>building</strong> and <strong>within 2.5m of its calculated centre</strong>.</p><p><em>Or</em></p><p>The seed is in the best possible position based on the nature of the premises, for example, Development Land, House Boat, Wind Farm.</p></td></tr><tr><td>2</td><td>General Internal Position</td><td><p>The address seed is <strong>contained within</strong> an OS MasterMap Topography Layer <strong>building</strong> but is more than 2.5m away from its calculated centre.</p><p><em>Or</em></p><p>The seed is in an internal position based on the nature of the premises, for example, Development Land, House Boat.</p></td></tr><tr><td>3</td><td>Transitional Position</td><td><p>The address seed has been <strong>changed from provisional to live in the last six months</strong>. It has been captured to a high level of positional accuracy, but the <strong>OS MasterMap Topography Layer feature is not yet captured</strong>.</p><p><em>Please note the address seed will only be moved pending any imminent mapping updates.</em></p></td></tr><tr><td>4</td><td>Street Location</td><td><p>The <strong>address seed is plotted in accordance with the declared street</strong> start or end coordinates.</p><p><em>Please note this is the highest accuracy possible for Street Records.</em></p></td></tr><tr><td>5</td><td>Postcode Unit Position</td><td>The address seed has been <strong>captured to Postcode Unit level</strong>. It will be updated when more information becomes available.</td></tr><tr><td>9</td><td>Low accuracy – marked for priority review</td><td>This address seed has been captured to a <strong>lower level of accuracy and will be updated as a priority</strong> over the coming releases.</td></tr></tbody></table>


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