Layer: 2007 Ortho Images (ID: 53)

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Name: 2007 Ortho Images

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Description: Colour aerial photography at 1 : 10 000 scale of the Regional Municipality of York, Ontario taken in the spring of 2007 was used to update 2005 aerial photography 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 2007 digital orthophotographs have a 20cm ground pixel resolution. The 2007 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.

Copyright Text: Orthophotos in GeoTiff format and digital terrain models were developed by J.D. Barnes Limited First Base Solutions, Markham Ontario as a contracted service. Conversion from GeoTif format to MrSid format was also done as a contracted service by J.D Barnes Limited First Base Solutions, Markham Ontario

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