Optimizing photogrammetric DEMs for glacier volume change assessment using laser-scanning derived ground-control points

Comparison of digital elevation models of alpine glaciers

Glaciers are indicators of the global climate change. The change in the extent and volume of a glacier can be estimated from digital elevation models (DEMs) produced from remotely sensed spaceborne or airborne data using photogrammetric, interferometric, or laser scanning techniques. For this study, the most promising data sources available were selected and tested. The selected sites were two ...

DEM quality assessment for quantification of glacier surface change

Photogrammetric digital elevation models (DEMs) are often used to derive and monitor surfaces in inaccessible areas. They have been used to monitor the spatial and temporal change of glacier surfaces in order to assess glacier response to climate change. However, deriving photogrammetric DEMs of steep mountainous topography where the surface is often obscured by regions of deep shadow and snow ...

An Evaluation on Different Number of Ground Control Points in Unmanned Aerial Vehicle Photogrammetric Block

This paper presents a novel method of unmanned aerial vehicle image processing using photogrammetric technique. The study area consist different slope class which involves undulating area around the Skudai area, Malaysia. All photogrammetric methods were applied in this study including selection of test area, flight planning, camera calibration and image processing orientation. A new ground con...

Optimizing nearest neighbour configurations for airborne laser scanning-assisted estimation of forest volume and biomass

Northern Research Station, U.S. Forest Service, 1992 Folwell Avenue, Saint Paul, MN 55038, USA Department of Geography, University of Hawai’i at Mānoa, 422 Saunders Hall, 2424 Maile Way, Honolulu, HI 96822, USA Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway Department of Agricultural, Food and Forestry Systems, Un...

Assessment of standing wood and fiber quality using ground and airborne laser scanning: a review