Diana Thunen

Bio: Diana Thunen is an academic researcher. The author has contributed to research in topics: Geographic information system. The author has an hindex of 1, co-authored 1 publications receiving 16 citations.

Recent literature in cartography and geographic information science

Abstract: (2013) Recent literature in cartography and geographic information science Cartography and Geographic Information Science: Vol 40, AutoCarto 2012 Research Symposium, pp 363-381

Mapping Crop Cycles in China Using MODIS-EVI Time Series

Abstract: As the Earth’s population continues to grow and demand for food increases, the need for improved and timely information related to the properties and dynamics of global agricultural systems is becoming increasingly important. Global land cover maps derived from satellite data provide indispensable information regarding the geographic distribution and areal extent of global croplands. However, land use information, such as cropping intensity (defined here as the number of cropping cycles per year), is not routinely available over large areas because mapping this information from remote sensing is challenging. In this study, we present a simple but efficient algorithm for automated mapping of cropping intensity based on data from NASA’s (NASA: The National Aeronautics and Space Administration) MODerate Resolution Imaging Spectroradiometer (MODIS). The proposed algorithm first applies an adaptive Savitzky-Golay filter to smooth Enhanced Vegetation Index (EVI) time series derived from MODIS surface reflectance data. It then uses an iterative moving-window methodology to identify cropping cycles from the smoothed EVI time series. Comparison of results from our algorithm with

Potential of UltraCamX stereo images for estimating timber volume and basal area at the plot level in mixed European forests

Abstract: Current technical advances in the field of digital photogrammetry demonstrate the great potential of automatic image matching for deriving dense surface measurements of the forest canopy. In contra...

Bulletin of Volcanology

Abstract: ▶ Covers volcanoes, their products, their eruptive behavior, and their hazards ▶ Aims to improve understanding of the deeper structure of volcanoes, and the evolution of magmatic systems ▶ Official journal of the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) ▶ 100% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again

Assessing flood hazard using flood marks and analytic hierarchy process approach: a case study for the 2013 flood event in Quang Nam, Vietnam

Abstract: The production of flood hazard assessment maps is an important component of flood risk assessment. This study analyses flood hazard using flood mark data. The chosen case study is the 2013 flood event in Quang Nam, Vietnam. The impacts of this event included 17 deaths, 230 injuries, 91,739 flooded properties, 11,530 ha of submerged and damaged agricultural land, 85,080 animals killed and widespread damage to roads, canals, dykes and embankments. The flood mark data include flood depth and flood duration. Analytic hierarchy process method is used to assess the criteria and sub-criteria of the flood hazard. The weights of criteria and sub-criteria are generated based on the judgements of decision-makers using this method. This assessment is combined into a single map using weighted linear combination, integrated with GIS to produce a flood hazard map. Previous research has usually not considered flood duration in flood hazard assessment maps. This factor has a rather strong influence on the livelihood of local communities in Quang Nam, with most agricultural land within the floodplain. A more comprehensive flood hazard assessment mapping process, with the additional consideration of flood duration, can make a significant contribution to flood risk management activities in Vietnam.