00000nam 2200000zi 4500 9.920343 CaOODSP 20251031142448 m o d f cr mn||||||||| 230221t20232023oncab o f000 0 eng d 9780660477527 CaOODSP eng rda CaOODSP n-cn-ns M183-2/8959E-PDF Fader, Gordon B., author. Making a three-dimensional model of Halifax Harbour, Nova Scotia, Canada / G.B.J. Fader, R.O. Miller, and B.J. Todd. [Ottawa] : Geological Survey of Canada = Commission géologique du Canada, 2023. ©2023 1 online resource (1 poster) : illustrations (chiefly colour), colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file = Dossier public, 2816-7155 ; 8959 "Halifax Harbour is one of best-studied harbours in the world. Researchers at the Bedford Institute of Oceanography map the seabed, perform geochemical analyses of sediment core samples, measure currents and tides and study the effects of pollution on the biota. To illustrate the complexity and intricate detail that exists on the seabed, a physical relief model of the harbour and surrounding area was constructed using the most recent technology. The model, which was milled from lightweight surfboard foam, shows underwater relief (bathymetry) as well as the land topography. Onshore, high-resolution satellite imagery was "draped" over the topographic relief using a specially designed 3-D plotter. In underwater areas, bathymetry is represented by a suite of colours ranging from light blue, to indicate shallow areas, to darker blue for deeper water. Computer generated shading was applied to emphasize detailed texture. Four "zoom" panels were also produced to focus on some of the finer details that are evident in the seabed. These details help us understand more about the harbour's geological history as well as the processes that are active today, both natural and manmade. This poster explains the many stages in the process of creating the Halifax Harbour relief model"--Introduction. Halifax Harbour (N.S.) Relief models. Halifax, Havre de (N.-É.) Modèles en relief. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8959. (CaOODSP)9.506878 PDF 67.00 MB https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8959-eng.pdf HTML N/A https://doi.org/10.4095/331507