Method of documenting a position of an underground utility

    公开(公告)号:US09766062B2

    公开(公告)日:2017-09-19

    申请号:US14747030

    申请日:2015-06-23

    申请人: Frederick D. Lake

    发明人: Frederick D. Lake

    摘要: A method of documenting a position of an underground utility which involves placing temporary markings on a ground surface designating an underground location of the underground utility. A photograph is then taken providing an overhead panoramic view of the temporary markings designating the underground location of the underground utility. The photograph includes visual landmarks, such as sidewalks, driveways, trees and hedges, thereby providing a visual reference. After excavation has taken place and the temporary markings have been removed along with the ground surface, using the photograph to reconfirm the underground location of the underground utility by using the visual reference provided by the relationship that the temporary markings depicted in the photograph bear to the visual landmarks that remain after excavation.

    AREA MEASUREMENT DEVICE AND METHOD
    27.
    发明申请

    公开(公告)号:US20170205228A1

    公开(公告)日:2017-07-20

    申请号:US15318475

    申请日:2014-08-22

    申请人: ZTE CORPORATION

    发明人: Yibo LI

    IPC分类号: G01B11/28 G06T7/62 G01B11/02

    摘要: An area measurement device includes an image acquisition module acquires a first image including an image of a target to be measured. A polygon establishment module determines at least one first polygon in first image formed by connecting lines between multiple first target points on the image of the target. A target point determination module determines multiple second target points on the target according to multiple first target points. A measurement module acquires a distance from a laser source to each second target point and an included angle of connecting lines between every two adjacent second target points and laser source in a laser ranging manner. A length calculation module calculates each side length of a second polygon/polygons which is/are a mapping/mappings of first polygon/polygons on the target. An area calculation module calculates an area of second polygon/polygons as an area of the target.