Patent ID: 6049989
Filing Date: 2000-04-18
Classification: G01C

Abstract:
A three-dimensional homologous surveying method comprising the steps of:a) preparing an inner spherical shell having a heavier lower half and a lighter upper half, an intermediate spherical shell having a heavier lower half and a lighter upper half, a ring-shaped shell holder, and a transparent outer spherical shell;b) making a zero reference at the center of an upper half of said outer spherical shell, a zero reference hole at the center of the upper half of said intermediate spherical shell, a zero reference at the center of the upper half of said inner spherical shell, and scalings on said inner spherical shell, said intermediate spherical shell and said outer spherical shell;c) fixedly mounting a compass on the lower half of said inner spherical shell; andd) positioning said inner spherical shell to rotate within said intermediate spherical shell about X-axis positioning said intermediate spherical shell to rotate within said ring-shaped shell holder about Y-axis, and positioning said ring-shaped shell holder to rotate within said outer spherical shell about Z-axis, enabling inner spherical shell, said intermediate spherical shell, said ring-shaped shell holder and said outer spherical shell to form a gyroscopic device for three dimensional surveying through X-axis, Y-axis and Z-axis concomitantly, and enabling said compass to indicate the direction of angle surveyed.