Strathcona County 10cm orthophotos were flown in May/September 2013. Individual tile locations can be determined using the 2013 Orthophoto Reference Map.
The MrSID files are Generation 4 (MG4), in order to accommodate the Near Infra-red band (band 4).
The imagery was captured using an UltraCam Xp, a large format digital aerial camera. These MrSid Generation 4 images may not be compatible with AutoCAD.