Question

The method of obtaining the earth's topography using cameras from the ground is known as :

• A. Aerial Photography
• B. Satellite Imagery
• C. Lidar Mapping
• D. Terrestrial Photography

Answer 1

Answer:

D. Terrestrial Photography

Classification of Remote Sensing based on the platform

Terrestrial Photography

• The method of obtaining the earth's topography using cameras from the ground is known as terrestrial photography.

Aerial Remote Sensing

• The method of obtaining photographs of the earth's surface continuously from the sky by using cameras mounted on aircrafts is known as aerial remote sensing.

• Aerial remote sensing is generally used to gather information about comparatively smaller areas.

• The advantage of aerial remote sensing is that information of any region can be gathered in accordance with our requirements

• Another merit of this method is that contiguous pictures of the areas along the path of the air crafts are made available.

• In each aerial photograph, nearly 60% of the places depicted in the adjacent photo is included.

• This is done for ensuring contiguity and to obtain three dimensional vision with the help of stereoscop. This is called overlap in aerial photographs.

• The instrument which is used to obtain three dimensional view from the stereo pairs is called stereoscope

Satellite Remote Sensing

• The process of gathering information using the sensors installed in artificial satellites is known as satellite remote sensing

• The process of collecting information using sensors fixed on artificial satellites is called satellite remote sensing.

• The artificial satellites are mainly divided into two types: Geostationary satellites and Sun Synchronous satellites