THE CRC TOPOGRAPHIC DATA BASE

Authors
  1. Whitteker, J.H.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
A data base of terrain elevations and surface types has been compiled, primarily to provide input data for radio-wave prediction programs. The data have been derived by hand-scaling 1:50000 scale topographic maps. An elevation and a surface code (forest, lake, etc.) is stored for each point in a square array with 500 metre spacing. The data reside on computer disk, and are organized for rapid access. The usual method of obtaining information from the data base is by means of a Fortran subroutine that provides elevations and surface codes at 500 m intervals along any specified great-circle path within the data-base area. The elevations may also be plotted on an ordinary (alphanumeric) computer terminal.
Report Number
1353 —
Date of publication
15 Feb 1982
Number of Pages
58
DSTKIM No
82-01147
CANDIS No
35728
Format(s):
Hardcopy;Originator's fiche received by DSIS

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