Concept in Definition ABC

The Tachymetry it's a source of measurement fast that does not show too much precision with respect to other methods. It allows us indirectly measure horizontal distances and level differences and is often used when too much precision is not needed or if the conditions of the land to be measured make the job of the tape metrics, for example. To use this method it will take a theodolite In the reticule, the upper thread (S), the middle thread (M) and the lower thread (I) can be read.

Then, to make a survey using this system, proceed in the same way as with other methods of lifting with tape or with theodolite, although, instead of measuring distances, the three readings and the value of the vertical angle will be taken to arrive at the measurement in question.

It should be noted that the tachymeter is an instrument similar to the theodolite and is used to measure angles and distances at the same time and that the theodoliteOn the other hand, it is a cutting optical mechanical measuring instrument

universal which is used to measure vertical and horizontal angles, being in the latter where it achieves outstanding precision; and if you use auxiliary tools you can even measure distances and uneven terrain. It is portable and Handbook and the theodolite that is used at this time consists of a telescope mounted on a tripod and with two graduated circles, one horizontal and the other vertical, with which the angles will be measured with the help of lenses.

There are several types of tachymetry: vertical sight current tachymetry, vertical sight tangential tachymetry and horizontal sight tachymetry.

Topics in Tachymetry