Abstract: A mobile vehicle capable of stabilized observation of topographic features for land surveying is provided. The vehicle is adapted to convert to a stabilized observation platform by the use of stabilizing means, such as swing and lift apparatus mounted on the rear of the vehicle. Observation of topographic features is provided by mounting surveying apparatus, such as a digital theodolites, on gimbaled apparatus employing two axles which in turn is supported by extensible means to elevate the surveying apparatus above the roof of the vehicle. Means for raising a portion of the vehicle's roof to accommodate the elevated surveying apparatus is also provided. Computation may be accomplished in the field using a suitable computer powered by a suitable power supply. The computer may also be used to control the various stabilizing, gimbaled and extensible means.