High Resolution Satellite Imagery:From Spies To Pipeline Management
Table 1: A Selection of Notable Present and Future High Resolution Satellite Missions
- Similar to Landsat-7 bands 1-4 (B 0.45-0.53; G 0.52-0.61; R 0.64-0.72; NIR 0.77-0.88-m)
- Missions last about 45 days
- Off nadir sensor viewing
- Nadir sensor viewing
Pilot Study :Transcanada Main Line
Study Objective
To establish if high resolution satellite imagery is as effective as ortho-photos identifying
population structures (e.g. residences, commercial, industrial buildings) within a buffer of
TransCanada's east line right-of-way. Population feature data are captured from digital ortho-photos,
IRS-1 satellite (5m resolution), and IKONOS satellite (1m resolution) imagery. Because
of their high resolution, clarity, and positional accuracy, the digital ortho-photos provide the
baseline data to which all other data sources are compared.
Two issues are specifically explored:
- Classification accuracy: How accurately do feature attributes on the IRS-1 and IKONOS
imagery coincide with the feature attributes extracted from the digital ortho-photos ?
- Positional accuracy: How far apart (e.g. distance in meters) are feature attributes on the IRS-1
and IKONOS images from the same features extracted from the digital ortho-photos ?
