Orthophoto Maps Flashcards
Where are aerial photographs taken from
From airplanes at different angles
What does vertical aerial photography involve
Surveying an area from the air using an aerial camera on a stabilizing mount in an aircraft, pointing downwards at an angle
What is an oblique view
A view from high above the ground at an angle (not vertical to the ground)
What is a low oblique angle
Small angle from the <45° vertical
What is a high oblique angle
Long way off >45° vertical and shows horizon
What is an orthophoto map
A vertical aerial photograph with control lines and some other features of a drawn topographic map such as spot heights place name and route numbers
Name one problem with vertical aerial photography
The scale is distorted
How is height measured on orthophoto maps
What is measured using contours spot heights, trigonometrical stations, and benchmar
