Orthoimagery Specifications

1999 Orthoimagery Specifications

• Aerial photography flown at a 1:6000 nominal scale
• Black & white photos
• Coverage of the entire City of Toronto

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
1999	0.15m	0.3m	0.45m	No	No

2003 Orthoimagery Specifications

• Aerial photography flown at a 1:6,000 nominal scale
• Images are taken in April when the leaves are not on the trees and there is no snow
• Black & white photos
• 60% forward overlap
• 15-30% side overlap between flight lines (65% in the down town core)
• Flown every two years for ESM assembly (Orthos are produced every 4 years)
• 7.5 cm resolution (or ground pixel) results in viewing at 1:200

The Aerial photography was flown in spring of 2003 at a nominal scale of 1:6,000, with the
“leaves off”; the trees for the purposes of topographic mapping. The source aerial
photography was scanned on a photogrammetric scanner and is provided at 7.5cm resolution, where each pixel in the aerial image represents 7.5cm on the ground. The entire City of Toronto  represents approximately 200GB of image data, and is utilised in the 3D environment of the City’s Enterprise Stereoscopic Model (ESM).

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2003	0.08m	0.16m	0.24m	No	No

2009 Orthoimagery Specifications

• Images were taken between March 31 and April 10
• Full colour photos
• 80% forward overlap
• 15-30% side overlap between flight lines
• 10cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2009	0.1m	0.2m	0.3m	Yes	Yes

2011 Orthoimagery Specifications

• Images were taken between April and May 9
• Full colour photos
• 60-80% forward overlap
• 30-60% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2011	0.1m	0.2m	0.3m	Yes	Yes

2013 Orthoimagery Specifications

• Images were taken between April 22 and May 27
• Full colour photos
• 60% forward overlap
• 30% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2013	0.08m	0.16m	0.24m	Yes	Yes

2014 Orthoimagery Specifications

• Images were taken between April 17 and July 24
• Full colour photos
• 60% forward overlap
• 30-60% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2014	0.08m	0.16m	0.24m	Yes	Yes

2015 Orthoimagery Specifications

• Images were taken between April 3 and May 1
• Full colour photos
• 60% forward overlap
• 30-60% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2015	0.08m	0.16m	0.24m	Yes	Yes

2016 Orthoimagery Specifications

• Aerial images were taken between April 30 and June 1
• Full colour photos
• 60% or 80% forward overlap
• 40% or 70% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2016	0.08m	0.16m	0.24m	Yes	Yes

2017 Orthoimagery Specifications

• Aerial images were taken between March 23 and April 24.
• Full colour photos
• 60% or 80% forward overlap
• 40% or 70% side overlap between flight lines
• 6 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2017	0.08m	0.16m	0.24m	Yes	Yes

2018 Orthoimagery Specifications

• Aerial images were taken between March 20 and March 26.
• Full colour photos
• 60% or 80% forward overlap
• 40% or 70% side overlap between flight lines
• 8 cm resolution (or ground pixel) results in viewing at 1:250

Vintage	Resolution	Horizontal Accuracy	Vertical Accuracy	RGB	NIR
2018	0.08m	0.16m	0.24m	Yes	Yes