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Grid calibration by coordinate transfer

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  • Personal Author:
    Fritz, Lawrence
  • Corporate Authors:
    National Ocean Survey
  • NOAA Program & Office:
    NOS (National Ocean Service)
  • Description:
    An operational technique is described for providing precise grid coordinates for an uncalibrated grid. The demand for calibrated grids to provide quality control of two-axis comparators has increased substantially by the rapid international growth of analytical photogramme try. For the grid calibration technique termed “coordinate transfer,” a precisely calibrated Master grid is used as a reference standard from which a second-generation calibrated grid may be obtained. The inherent two-dimensional geometric strength, as well as the absolute scale of the Master, is transferred to the uncalibrated grid in a manner similar to the method employed in the transferring of absolute scale from a precisely calibrated linear scale to a grid in the trilateration technique of grid calibration. Test results and relative accuracies of two grid calibration methods are discussed.
  • Keywords:
  • Series:
    NOAA technical report NOS ; 53
  • Document Type:
    Technical Report
  • Rights Information:
    Public domain
  • Compliance:
    Library
  • Main Document Checksum:
    urn:sha-512:481dd83783805f244ff4e150cef33ca45755c03f457673702d112707f8d4e53cf2b9889f0e1bdaf7ba5e7e3c7de6f120f53b743e77e544ad467550550abc6739
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  • File Type:
    Filetype[PDF - 46.97 MB ]
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