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METHOD AND APPARATUS FOR GROUND-BASED SURVEYING IN SITES HAVING ONE OR MORE UNSTABLE ZONE(S)

  • US 20070052951A1
  • Filed: 05/18/2004
  • Published: 03/08/2007
  • Est. Priority Date: 05/18/2004
  • Status: Active Grant
First Claim
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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), 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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