The image collection consists of high-resolution digital orthophotos covering the Lower Mainland of British Columbia, extending from Georgia Strait to Chilliwack. The coverage includes the populated areas of Greater Vancouver and Fraser Valley from West Vancouver to Chilliwack.
The colour aerial photography was produced by Selkirk Remote Sensing Ltd. using a Wild RC-20 aerial camera equipped with forward motion compensation and a 153mm focal length lens, mounted in a twin engine Piper Navaho PA 31 aircraft. The flights were conducted on May 14, July 12 and July 17, 1995, at an altitude of 15,000 feet above mean ground, resulting in a nominal photo scale of 1:30,000.
Original diapositives were scanned by Triathlon Mapping Corporation using a Zeiss PS-1 Photoscan Linear Array scanner at a sample rate of 30 microns (846 dpi). This produced a raw ground pixel resolution of approximately 0.9 metres. The imagery was digitally oriented and orthorectified to correct for terrain and perspective distortions. During the rectification process, pixels were resampled using a cubic convolution algorithm to a final resolution of 1 metre. The resulting geo-referenced orthophotos meet the positional accuracy of a 1:20,000 scale map. The dataset is referenced to the UTM NAD83 horizontal datum and the Geodetic NAVD 27 vertical datum.
The collection consists of 261 orthophotos organized into 16 zones, and is provided here for public access and use. Please find the georeferenced orthophotos based on the zonal maps shows below. Here is the data for each zone-
Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 Zone 7 Zone 8
Zone 9 Zone 10 Zone 11 Zone 12 Zone 13 Zone 14 Zone 15 Zone 16
Map: Orthophoto Zones of Greater Vancouver & Fraser Valley Region.