Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

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Smoothing contour lines of hydrographical maps: an optimised approach Hennau, M.; De Wulf, A. (2006). Smoothing contour lines of hydrographical maps: an optimised approach, in: Evolutions in hydrography, 6th - 9th November 2006, Provincial House Antwerp, Belgium: Proceedings of the 15th International Congress of the International Federation of Hydrographic Societies. Special Publication (Hydrographic Society), 55: pp. 199-201 In: (2006). Evolutions in hydrography, 6th - 9th November 2006, Provincial House Antwerp, Belgium: Proceedings of the 15th International Congress of the International Federation of Hydrographic Societies. Special Publication (Hydrographic Society), 55. International Federation of Hydrographic Society: London. 234 + cd-rom pp., meer In: Special Publication (Hydrographic Society). Hydrographic Society: London. ISSN 0309-8303, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 114208 [ download pdf ]

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Trefwoorden

Aquatic sciences > Marine sciences > Earth sciences > Oceanography > Physical oceanography > Hydrography Audiovisual materials > Graphics > Maps

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Auteurs		Top
Hennau, M., meer De Wulf, A., meer

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Abstract

Perhaps the most classic way to represent 3D-objects, like the DTM from a hydrographical survey, on a 2D medium is by generating contour lines. The sight of an unsmoothed contour map can be too rough and is often rejected by the map users, especially when a shelving surface is being represented. However, many users object to smoothing on grounds that smoothed contours do not honour the linear character of the source data. Therefore, the application of smoothing procedures for aesthetic purposes should be in respect with the geometrical properties of the source data. A popular method to smooth contour lines consists in smoothing each contour independently of the rest. A second approach engages the distillation of contour lines from smooth surface patches. An eclectic procedure has been worked by A. Christensen out to combine the advantages and minimize the drawbacks of both approaches. Furthermore we have refined the eclectic method by inserting optimisation algorithms into the procedure in order to smooth in an adaptive way and to increase the geometrical integrity of the contours.

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