20250627 15135800 1.0 TRUE London20_RGB_2019.sid The image data is stored in a Multi-resolution Seamless Image Database (MrSID, Generation 3 format) and it is adjusted to reference ‘grid’ units of measurement. However it should be noted the aerial imagery is not suitable for accurate measurements and/ or scaling.Coordinate system: Universal Transverse Mercator (UTM), Zone 17;Datum: North American Datum (NAD) 83Central Meridian: 81° WestScale: 1:15400 (approx.)Date: April 2018Pixel Resolution: 10 cmFile Compression: 20:1File Size: 11.4 GBSource Format: TIFF Produced for the Corporation of the City of London - Geomatics Division from data captured and processed by First Base Solutions (2018)