| 摘要 |
In order to determine the actual position (A) of a geodetic measuring instrument ( 1 ) inside a dead range (T) wherein signals originating from a positioning system are shadowed, two reference structures ( 5 ) are detected from at least two known positions and the distances associated with the reference structures ( 5 ) are measured. Image information linked to said distance measurements is captured. Said information contains data on the arrangement of the reference structures ( 5 ). The actual position ( 1 ) can be derived from subsequent capture of the reference structures ( 5 ) from a position inside the dead range (T). Image processing methods are used advantageously to identify and measure the reference structures ( 5 ).
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