On Civiltoday.com, find the definition of 'Tacheometry'. Also, identify the primary method used to determine horizontal and vertical distances in Tacheometric Surveying and the specific instrument employed for this technique, as described on the homepage.
Navigate to the Civiltoday.com homepage. Locate the article snippet for 'Tacheometric Surveying- Methods, Detail Procedures' on the homepage. Extract the definition of Tacheometry from the snippet. Identify the method for obtaining horizontal and vertical distances from the snippet. Identify the instrument used for Tacheometric Surveying from the snippet. State the extracted definition, method, and instrument.
The definition of Tacheometry is stated as: 'a branch of angular surveying in which the horizontal and vertical distances are obtained by optical means as opposed to the ordinary process of chain and tape.' The method for obtaining horizontal and vertical distances is identified as 'optical means'. The instrument used is identified as 'theodolite'. All information must be sourced directly from the article snippet visible on the Civiltoday.com homepage.