An angle and distance measuring apparatus having a built-in microcomputer is combined with a GPS survey machine so as to form a survey apparatus. The GPS survey machine measures the position of the survey apparatus by real time and obtains the values of coordinates defining the position of the survey apparatus. The angle and distance measuring apparatus creates and stores observation data in performing a survey. The microcomputer then stores the values of the measured coordinates as installation point information for observation data. Whenever the observation data is analyzed, the installation point of the survey apparatus can be confirmed. Thus, the survey result is easily evaluated and judged. As a result, based on the correct observation data, a highly reliable survey result is produced.

A surveying system is presented comprising a surveying equipment and a radio navigation unit comprising a radio navigation antenna and a radio navigation receiver, both removably connectable both on the survey equipment and on a survey object. The object is provided with at least one target for the surveying equipment to be directed to. A removable panel co-operates with the radio navigation unit and with the survey equipment. The panel comprises a computer provided with a program system adapted for operating both the radio navigation receiver and the surveying equipment.

A geodetic total station comprising an upper part (1a) provided with a support (2) with at least one support section (2a; 2b), an electronic display control unit (4), a total station data interface (6) provided with electrical contact elements (6a), and a top attachment (20) that is mechanically coupled above the support (2) and the telescope (3), in a detachable manner, by means of at least one mechanical support interface (8a; 8b) and at least one corresponding mechanical top attachment interface (21a; 21b). The total station data interface (6) is arranged on the support section (2a; 2b), and the top attachment (20) receives the peripheral components and has a top attachment data interface (23) which comprises electrical contact elements (23a) and is connected to the peripheral components in a data-transmitting manner. The mechanical support interface (8a; 8b), the mechanical top attachment interface (21a; 21b), the total station data interface (6), and the top attachment data interface (23) are arranged in such a way that the contact elements (6a, 23a) of the total station data interface (6) and the top attachment data interface (23) are brought into mutual electrical contact by the coupling of the top attachment (20) to the support section (2a; 2b).

Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section 203 obtains an arrival direction of a received azimuth designation signal from a reference station or another terminal station using an arithmetic operation or the like. A transmitting direction forming section 204 determines the direction opposite to the arrival direction obtained by the arrival direction obtaining section 203 as a transmitting direction. A reference azimuth detecting section 207 detects the transmitting direction determined by the transmitting direction forming section 204 as a reference azimuth. An azimuth designation signal generating section 205 generates an azimuth designation signal so as to radiate radio waves having directivity in the transmitting direction determined by the transmitting direction forming section 204.

A method and apparatus for surveying is described whereby a selected survey point may be quickly and accurately located and marked. The apparatus comprises a prism pole with a mechanism for assuring the vertical orientation of the prism pole to the earth's surface, a satellite positioning system antenna mounted to the prism pole, and a marking device mounted to the prism pole for establishing a survey mark. The surveying apparatus is designed to be mounted to a wheeled vehicle for increased convenience to the user.