| 摘要 |
PROBLEM TO BE SOLVED: To make a user of form a topographical map who has no expert surveying skill drawable the map, and to allow the user to quickly utilize required data in the electronic data form. SOLUTION: This invention is formed of a field surveying system and an electronic three dimensional contour line forming system. The field surveying system measures a distance, a direction and an angle of elevation with respect to a graphic object as an object of a non-prism macrometer, and transforms a result of the measurement to the three dimensional crossing coordinates having (x), (y), (z) coordinate axis, and stores them as the field surveying electronic data in a data recorded (a compact computer). The basic data for forming a topographic map are thereby obtained. The electronic three dimensional contour line forming system is formed of a personal computer and a CAD software, and converts the field surveying electronic data to the CAD data, forms a contour line with the height attribute, forms a wire frame bird's eye view for drawing, and a photographic image of the field is attached for drawing.
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