Description: Colour aerial photography at 1:10 000 scale of the Regional Municipality of York, Ontario taken in the spring of 2019was created by JD Barnes Inc. colour digital orthophotography and digital terrain data was developed from these images. Orthophotographs combine the image characteristics of the photograph with the geometric qualities of a map. Orthophotography was developed for the entire region. The 2019digital orthophotographs have a 15cm ground pixel resolution. The 2019 digital orthophotos were subdivide into 1 kilometre by 1 kilometre tiles and were delivered in georefierenced Geotiff image files. The image tiles are horizontally referenced to 6 degree UTM projection and NAD -83 datum. Vertical control datum is referenced to mean sea level as Bench Marks established by the Geodetic Survey of Canada (CGVD28). The images were later combined by municipality and converted into nine MrSid format images covering the entire region.