METHOD FOR DETERMINING POSITIONS OF POINTS TO BE MEASURED

• US 20090082992A1
• Filed: 11/30/2007
• Published: 03/26/2009
• Est. Priority Date: 09/24/2007
• Status: Active Grant

• Current Assignee: Leica Geosystems AG (Hexagon AB)
• Original Assignee: Leica Geosystems AG (Hexagon AB)
• Inventors: GREEN, Alastair, MAYER, Jurgen, DESMOND, Matthew Gerard
• Granted Patent: US 7,647,199 B2
• Time in Patent Office: Days
• US Class Current: 702/152
• CPC Class Codes: G01C 15/002 Active optical surveying means optical plumbing G01C15/105

Abstract

A position determination method for a set of new points to be surveyed, using a geodetic device and reference points whose positions in an absolute coordinate system are known. The position determination is effected by referencing the new points relative to a set of reference points and measurement of the reference points and of the new points in a relative coordinate system for referencing by the geodetic device—relative measured quantities being registered. Furthermore, the new points and the reference points are updated by successive addition in each case of the measured new points and reference points to the set of new points and set of reference points, respectively, and updating the position determination of the new points taking into account all of the respective actual reference points is effected if a specified minimum coefficient of determination for the referencing is ensured by the actual set of reference points.

Claims

1. A position determination method for points of a set of new points which are to be surveyed as new points, comprising

a geodetic device, in particular a total station or theodolite,

reference points whose positions in an absolute coordinate system are known,

the position determination of the new points of a set of new points in the absolute coordinate system being effected by referencing of the new points relative to the reference points of a set of reference points,

measurement of the reference points and of the new points in a relative coordinate system for referencing being effected by the geodetic device, relative measured quantities being determined,

wherein

the set of new points and the set of reference points are updated in each case by successive addition in each case of the measured new points and reference points to the set of new points and set of reference points, respectively,

and

updating of the position determination of the new point taking into account in particular all reference points of the respective actual set of reference points is effected if a specified minimum coefficient of determination for referencing is ensured by the actual set of reference points.

2. The positions determination method as claimed in claim 1, wherein the measurement of the new points and of the reference points is effected with point type overlap.

3. The position determination method as claimed in claim 1, wherein the updating of the position determination is effected for all new points of the respective actual set of new points.

4. The position determination method as claimed in claim 1, wherein a position of the geodetic device in the absolute coordinate system is determined as a new point.

5. The position determination method as claimed in claim 1, wherein each updating of the set of reference points triggers—

in particular automatically—

updating of the position determination of the new points.

6. The position determination method as claimed in claim 1, wherein the updating of the position determination of the new points can be triggered by a user.

7. The position determination method as claimed in claim 1, wherein the steps are effected at least partly automatically.

8. The position determination method as claimed in claim 1, wherein a sequence for the measurement of the new points and reference points by a relative position of the new points and reference points is determined from the geodetic device.

9. The position determination method as claimed in claim 8, wherein the sequence based on azimuth angles of the new points and reference points is determined from the geodetic device.

10. The position determination method as claimed in claim 8, wherein the sequence based on elevation angles of the new points and reference points is determined from the geodetic device.

11. The position determination method as claimed in claim 1, wherein the effort involved in operating the device for the measurement of each of the new and reference points for establishing a measuring series is taken into account.

12. The position determination method as claimed in claim 1, wherein the reference points are generated at least partly by a repositionable GNSS unit, the positions thereof in an absolute coordinate system being provided in each case by GNSS position determination as known positions.

13. The position determination method as claimed in claim 9, wherein the sequence based on elevation angles of the new points and reference points is determined from the geodetic device.