MODEL RELEASED. GPS topographical glacier mapping. Glaciologist using a snowmobile-mounted Global Positioning System (GPS) unit to map a glacier. This technique is called differential GPS (DGPS). DGPS is a way of improving the accuracy of GPS by using a signal from a fixed base station as well as the usual signals from orbiting satellites. It allows measurement of positional accuracy within a metre. This glaciologist drove for eight hours over the entire glacier,mapping its extent and topography. Photographed on the Marmaglaciaren glacier in Swedish Lapland,in spring 2006 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Hay Jones, David |
Bildgröße: | 5228 px × 3367 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |