Steve Ditko has only ever studied at Emerson.
A TOID -LRB- TOpographic IDentifier , pronounced toyed -RRB- is a unique reference identifier assigned by the Ordnance Survey to identify every feature in Great Britain .. Ordnance Survey. Ordnance Survey. Great Britain. Great Britain. The identifier consists of two parts , a prefix ` osgb ' and a unique identifier that is 13-16 digits long .. In GML 2 , a TOID is encoded as a gml  : fid -LRB- Feature Identifier -RRB- ; in GML 3 as a gml  : id .. GML. Geography Markup Language. Around 440 million man-made and natural features have been thus identified  : buildings , roads , fields , phone boxes , pillar boxes , landmarks and many other types .. The identification system is designed to be used in GIS , digital cartography and in any customized computer application , including non-cartographic ones , where information about fixed , real-world features needs to be managed .. GIS. Geographic information system. cartography. cartography. Using consistent identifiers -LRB- IDs -RRB- makes it much easier to share data between various kinds of applications and systems .. A TOID remains constant throughout the lifetime of the real-world feature it identifies , and is guaranteed not to be reassigned to anything else when the feature no longer exists .. Example  : the TOID for the Tower of London is osgb1000006032892 .. Tower of London. Tower of London