Canada Centre for Remote Sensing
Tour Canada from space
Kanata, Ontario
Larger, more detailed
image here: 267kb jpg
This very high resolution image, taken in autumn, was
acquired by the MEIS sensor, on board the CCRS Falcon Fanjet
aircraft. It shows a portion of Kanata, Ontario, a small suburban
city, located near Ottawa, the capital of Canada.
Feature shape, texture, pattern, colour, position, as well as
context, all help in interpreting such an image. For example, the
layout of the roads suggests a housing
subdivision. Crescent roads are lined with individual houses; at the top of the
image, construction is underway for
additional homes. In the neighbourhood may be seen: cars, footpaths, fences, individual trees and the
occasional swimming pool. The
beautiful fall colours are apparent in the trees and shrubs.
The subdivision is bordered by a golf course. Course features
which may be identified are fairways
(bright green elongated strips), sand
traps (sand coloured ovals), tees (distinct rectangular patches
at the foot of the fairways) and greens (lighter green patches at
the head of the fairways).
Question: Why are some roads darker than others?
[
Answer ]
About this Image
| Location: |
Kanata, Ontario |
| NTS
map(s): |
31 G/5 (1:50,000) |
Location Map:  |
See a detailed map (1:1M) of the
region |
| Image Date: |
October, 1993 |
| Satellites/Sensors: |
Airborne Multispectral
Electro-Optical Imaging Spectrometer
MEIS, airborne (bands 448nm, 553nm, 641nm displayed as
R,G,B) |
| Resolution: |
0.5 m pixels |
| Image Area: |
Approximately 1km by
0.5km |
| Image Features: |
Construction, townhouses,
single family houses, golf course fairways and sand
traps, cars, fences, swimming pools |
| Related Tour Images: |
Urban / Rural Boundary - Nepean, Ontario |
| Related Glossary
Terms: |
These terms from the CCRS Glossary may help you to
understand this image and its interpretation:
MEIS,
image
texture, tone,
brightness,
contrast,
spectrometer
|
| Related Tutorial
Sections: |
These sections of the "Fundamentals of Remote Sensing"
tutorial
by CCRS will help you to better understand this image
and its interpretation:
2.3 2.8 4.2 5.7
|
| Image Credits: |
Acquired and processed by
the Canada Centre for Remote Sensing |
|
Additional
Information: |
Data from the MEIS airborne sensor is very high quality and
high resolution. Information can be collected from the
visible and near infrared portions of the electromagnetic
spectrum. In the case of this image, the 3 bands (448nm,
553nm, 641nm) represent blue, green and red portions of
visible light. When they are displayed together, you see an
image that looks a lot like a regular colour photograph.
MEIS imagery has been used for a number of applications
including: insect damage assessment and clear cut mapping in
forests, vegetation stress monitoring, mineral exploration
and marine oil slick measurement.
|
| Question: |
Why are some roads darker than
others? |
| Answer: |
The darker roads were constructed
at a different time (and perhaps with slightly different
materials) than the lighter-toned roads. Thus there is an aging
and wear factor involved which affects how the road surface
reflects light. |
