Blar i NGU Open Archive på forfatter "Dolan, Margaret F.J."
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An assessment of scale, sampling effort and confidence for maps based on visual and acoustic data in MAREANO
Thorsnes, Terje; Bellec, Valerie; Hodnesdal, Hanne; Bjarnadottir, Lilja Run; Buhl-Mortensen, Pål; Baeten, Nicole; Gonzalez-Mirelis, Genoveva; Dolan, Margaret F.J.; van Son, Thijs Christiaan (NGU-Rapport (2015.043), Report, 2015)MAREANO has mapped Norwegian waters for ten years, and produced several map series at different scales addressing bathymetry, geology, biology and pollution. There has been an increasing demand to document the confidence ... -
Calculation of slope angle from bathymetry data using GIS - effects of computation algorithm, data resolution and analysis scale
Dolan, Margaret F.J. (NGU-Rapport (2012.041), Report, 2012)This report presents the results of a spatially nested case study using MAREANO multibeam bathymetry and regional data. The purpose of the case study was to investigate and illustrate common factors affecting terrain ... -
Evaluation of alternative bathymetry data sources for MAREANO: A comparison of Olex bathymetry and multibeam data for substrate and biotope mapping
Elvenes, Sigrid; Dolan, Margaret F.J.; Buhl-Mortensen, Pål (NGU-Rapport (2012.030), Report, 2012)The MAREANO (Marine AREA database for NOrwegian waters) seabed mapping programme generates a wide range of products, including sediment and benthic biotope maps. Production of these maps relies heavily on full-coverage ... -
Evaluation of Underwater Hyperspectral Imagery (UHI) for MAREANO
Dolan, Margaret F.J.; Bjarnadottir, Lilja Run; Buhl-Morten, Pål; Thorsnes, Terje; Ludvigsen, Martin; Tegdan, Jørgen; Aas, Lars Martin Sandvik; Ekehaug, Stefan (NGU-Rapport (2015.047), Report, 2016)As part of a method development initiative in the MAREANO seabed mapping programme (www.mareano.no) a pilot survey using Underwater Hyperspectral lmagery (UHI) was undertaken in Trondheimsfjorden during December 2014. ... -
Interpretation of green laser and aerial photograph data for seabed sediment mapping in shallow areas, Søre Sunnmøre
Dolan, Margaret F.J.; Bellec, Valerie K.; Elvenes, Sigrid; Lepland, Aave (NGU-Rapport (2018.027), Report, 2018)This report provides a technical summary of the interpretation of green laser and aerial photograph data for seabed sediment mapping in shallow areas, Søre Sunnmøre. This work was conducted under Work Package 10 of the ... -
Marine grunnkart i Sør-Troms. Rapport om biotopmodellering
Dolan, Margaret F.J.; Arvesen, Børge; Longva, Oddvar; Michelsen, Helena; Rasmussen, Tone; Selboskar, Odd Harald; Lepland, Aave; Plassen, Liv; Elvenes, Sigrid (NGU-Rapport (2012.070), Report, 2012)Denne rapporten oppsummerer arbeidet med framstilling av et kart over marine biotoper i Sør-Troms. Med biotopkartet er det nå utarbeidet 8 forskjellige marine grunnkart i Astafjordprosjektet fase II og III (www.astafjord ... -
Terrain characterization from bathymetry data at various resolutions in European waters - experiences and recommendations
Dolan, Margaret F.J.; Van Lancker, Vera; Guinan, Janine; Al-Hamdani, Zyad; Leth, Jørgen; Thorsnes, Terje (NGU-Rapport (2012.045), Report, 2012)The purpose of this report is to review how bathymetric data may be used to characterize seabed terrain with a view to benthic habitat mapping This study was led by the Geological Survey of Norway with contributions from ...