An IDL Object for Managing Gridded Bathymetry Files

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Authors
  1. Roger, W.A.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
The Networked Underwater Warfare (NUW) Technology Demonstration Project (TDP) has a need for precise ocean bottom topography of the Scotian Shelf area. The depth of the ocean at particular locations is utilized by a number of technologies within the project to either predict future ocean conditions, or as input to tactical algorithms. The ocean bathymetry over some specified area is also needed as one layer in the display of targets. This document describes a software object to extract and display underwater depths from a gridded bathymetry file. It is written in the IDL programming language to facilitate ease of use and rapid development of the controlling software. The object first reads the file into memory for quick response, then provides a number of software methods to obtain selected areas of depth, display all or portions of the bathymetry, and allow additions to the display such as contour lines and lines of bearing. The object can handle a range of bathymetry files that store depths at locations that are separated by a constant angular difference in both latitude and longitude.

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Report Number
DRDC-ATLANTIC-TM-2005-265 — Technical Memorandum
Date of publication
01 Mar 2006
Number of Pages
66
DSTKIM No
CA027765
CANDIS No
526129
Format(s):
CD ROM

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