METHOD AND APPARATUS FOR GROUND-BASED SURVEYING IN SITES HAVING ONE OR MORE UNSTABLE ZONE(S)
First Claim
Patent Images
1. Method of ground-based surveying on a site (2) which comprises an unstable zone (60;
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20) and at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone, in which method at least one surveying device (TS8, TS9;
ST1-ST3) is used to acquire positional data by sighting at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3), characterised in that it further comprises the steps of;
providing at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20), using said surveying device(s) (TS8, TS9;
ST1-ST3) to acquire positional data by sighting said at least one sighting point (UP3-UP5;
A-C) that is located within said unstable zone (60;
20), and combining the positional data acquired from;
i) said at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone and ii) at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20), to produce a positional reference for said surveying device(s).
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Abstract
The invention relates to ground-based surveying on a site (2) which comprises an unstable zone (60) and at least one control point (FCP1, FCP2, FCP6, FCP7; CP1-CP3) placed outside the unstable zone, in which method at least one surveying device (TS8, TS9; ST1-ST3) is used to acquire positional data by sighting least one control point (FCP1, FCP2, FCP6, FCP7; CP1-CP3). The approach comprises:
- providing at least one sighting point (UP3-UP5; A-C) within the unstable zone (60; 20),
- using the surveying device(s) (TS8, TS9; ST1-ST3) to acquire positional data by sighting the at least one sighting point (UP3-UP5; A-C) that is located within the unstable zone (60; 20), and
- combining the positional data acquired from: i) the at least one control point (FCP1, FCP2, FCP6, FCP7; CP1-CP3) placed outside the unstable zone and ii) at least one sighting point (UP3-UP5; A-C) within the unstable zone (60; 20), to produce a positional reference for the surveying device(s). The combining step can be implemented using a bundle adjustment technique.
19 Citations
28 Claims
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1. Method of ground-based surveying on a site (2) which comprises an unstable zone (60;
-
20) and at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone, in which method at least one surveying device (TS8, TS9;
ST1-ST3) is used to acquire positional data by sighting at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3), characterised in that it further comprises the steps of;
providing at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20),using said surveying device(s) (TS8, TS9;
ST1-ST3) to acquire positional data by sighting said at least one sighting point (UP3-UP5;
A-C) that is located within said unstable zone (60;
20), andcombining the positional data acquired from;
i) said at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone and ii) at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20), to produce a positional reference for said surveying device(s). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28)
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20) and at least one control point (FCP1, FCP2, FCP6, FCP7;
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23. System for ground-based surveying on a site (2) which comprises an unstable zone (60;
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20) and at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone, comprising at least one surveying device (TS8, TS9;
ST1-ST3) arranged to acquire positional data by sighting least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3), characterised in that it further comprises;
at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20), at least one said surveying device (TS8, TS9;
ST1-ST3) being arranged to acquire positional data by sighting at least said sighting point within said unstable zone, andmeans for combining the positional data acquired from;
i) said at least one control point (FCP1, FCP2, FCP6, FCP7;
CP1-CP3) placed outside said unstable zone and ii) at least one sighting point (UP3-UP5;
A-C) within said unstable zone (60;
20), to produce a positional reference for said surveying device(s). - View Dependent Claims (24)
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20) and at least one control point (FCP1, FCP2, FCP6, FCP7;
Specification