Determination of apparent altitude

To determine the declination of an direction one needs to measure the azimuth and the apparent altitude.
Several way can be followed to determined the apparent altitude (elevation) of a particular environment. There are generally two different ways to determine the apparent altitude:
  1. from one point (A: like with a clinometer, photometry or reference object)
  2. using two points from behind the desk (A and B: like with an map or ground plan)
The methods and tools used with these ways are discussed in more detailed on this web page. It is very important to measuring the (apparent) altitude as accurate as possible.

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Last major content related changes: July 23, 2000