Point description
The geodesist describes a point description or topography as a sketch with precise dimensions (inclined distances) for the reliable location of a survey point .
The calibration sketch is usually drawn in A4 format and later transferred to an A5 final drawing. The sketch itself does not have to be to scale, but should contain 4–5 distinctive details that are helpful for finding - for example:
- two corners of a nearby building , distance from a fence, etc.
- large trees (here the bulk measure to the nearest point on the trunk is measured)
- Poles, hydrants , road fixtures such as manhole covers or squeegees
- in open terrain, at least distances to the road or furrows.
Even if most of the measuring points are well marketed and important points are often marked with a red wooden stake, points close to the ground are often overgrown by the sward or several centimeters covered by gravel from the snow removal. Here, an exact topography can save a lot of time and effort during exposure.
If in isolated, difficult cases (e.g. in dangerous places or on freshly plowed areas) it is difficult to measure a blocked dimension, an approximate increment can sometimes be helpful.
See also
literature
- Heribert Kahmen, Surveying Volume 1. De Gruyter Berlin, New York 1988, ISBN 3-11-011759-2