{"refrec":{"BRefID":108623,"RR":"<b>Vanderstraete, T.; Goossens, R.; Ghabour, T.K.</b> (2003). Remote sensing as a tool for bathymetric mapping of coral reefs in the Red Sea (Hurghada-Egypt). <i>Belgeo 2003(3)</i>: 257-269","BEntID":103394,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":1,"RefStringPartII":". <i>Belgeo 2003(3)</i>: 257-269","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Vanderstraete, T.; Goossens, R.; Ghabour, T.K.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Vanderstraete, T. <i>et al.</i>","Englishabstract":"For monitoring coral reefs, a bathymetric map is useful as a base map. Different methods have already been developed to map bathymetry using remote sensing. Two main groups can be distinguished. One group is using active remote sensing data; the other is based on passive sensor generated multi-spectral information. In this article, the focus is on the passive data method. A modified «depth of penetration» mapping method was implemented on a Landsat7 ETM+-image over Hurghada (Egypt). Some 420 depth measurements were used for ground-truthing and accuracy testing. The accuracy test revealed that the resulting bathymetric map is useful for coral reef mapping, but care should be taken when using it. Deviations from reality were caused by assumptions inherent to the theory used, field sampling, satellite image characteristics and errors during implementation of the method.","AbstractOtherLang":"Een bathymetrische kaart vormt een van de basiselementen voor het bestuderen van koraalriffen. Verschillende methodes werden reeds ontwikkeld voor het bepalen van de diepte met behulp van teledetectie. Twee belangrijke groepen kunnen hierin onderscheiden worden. De ene groep baseert zich op informatie verkregen van actieve sensoren, de andere gebruikt multispectrale data afkomstig van passieve sensorsystemen. In dit artikel wordt enkel de passieve sensor methode besproken. Een aangepaste «Depth of Penetration» karteringsmethode werd toegepast op een Landsat7 ETM+- beeld over Hurghada, Egypte. 420 dieptemetingen werden gebruikt voor het absoluut determineren van de afgeleide diepte en voor het bepalen van de nauwkeurigheid van het resultaat. Hieruit bleek dat de resulterende dieptekaart gebruikt kan worden bij het karteren van de koraalriffen. Toch is enige voorzichtigheid bij het gebruik gewenst. Fouten werden veroorzaakt door veronderstellingen inherent aan de toegepaste theorie, de gebruikte waarnemingstechnieken, de kenmerken van het satellietbeeld en fouten bij de implementatie van de methode.","BibLvlCode":"AS","StandardTitle":"Remote sensing as a tool for bathymetric mapping of coral reefs in the Red Sea (Hurghada-Egypt)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:58:19.190595","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2013-07-16","DateCreate":"2007-03-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":"vabb:277948","OpenAcc":1},"refs":null,"anarec":{"AnaID":108623,"PubliDate":2003,"Pagination":"257-269","XtraPublOfAnaID":null,"ISBN":null,"Volume":"2003","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":75468,"SerRR":"Belgeo: Belgisch Tijdschrift voor Geografie = Belgeo: Revue belge de Géographie = Belgeo: Belgian Journal of Geography. 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