Section 2.2 Flashcards
What are some applications of air photo interpretation? (6)
Map making Urban and rural planning Environmental impact study Civil law cases Real estates evaluation Art
In 1856 who was the first person to explore aerial photography?
Gaspard Felix Tournachon
What is a 16th century example of aerial photography?
Galileo telescope
In 1903 _______ carried cameras.
Pigeon
True or false:
WW1, WW2 and the Cold War used aerial photographs
True
True or false:
While aerial photography is used for looking at forest size it cannot look at forest health.
False
Define oblique photography.
Side views of features, hard to take measurements with.
Define Vertical photography.
Top down view good for measurements
High oblique is ______ effective for looking at quantitative measurements
Less
What are three attributes we use to define colour?
Hue
Chroma
Value
Define hue.
What colour something is (red, yellow, green, blue) there are an infinite amount hues
Define chroma.
It is the saturation of a hue, measures lack of black or white
Define value (in terms of colour).
Relative abundance of primary colour
What is additive light mixing?
How computers specify light
What is subtractive light mixing?
How colour printing is managed
Film speed is referring to…
How much light is needed to expose the film.
Fast films need ______ light and slow films need _______ light.
Less, more
Fast films have _____ crystals, slow films have ______ crystals
Larger, smaller
What is the purpose of filters?
They are designed to absorb specific wavelengths and transmit others
Define resolution in terms of film.
The ability of a film to capture details
Identify the variables:
Rg = (Rs x f)/ H
Rg = ground resolution in line pair per meter Rs = system resolution in line pairs per millimetre H = height of camera above the ground in meters
What can we look at using air photo interpretation?
Shows changing cultural features and land use
