Technotes and livecam locationsTime lapse acceleration: The livecam archives were searched for images taken during mostly clear weather. Usually on 4 to 7 day per month a reasonably clear image was acquired. When selecting the images I tried to find them as well distributed in time as possible. During periods of bad weather, some longer than usual gaps (up to 14 days) had to be accepted but only in rare cases. The movies run at 12 frames per second. This results in an approximate (and not perfectly constant) speed of 2.5 months/sec or an acceleration of roughly 6 million times. | |
 Cable car station close to the summit of Eggishorn (EH). |  Konkordiahütte, maintained by the Swiss Alpine Club, and the confluence of three tributary glaciers, Aletschfirn, Jungfraufirn and Ewigschneefeld (f.l.t.r.), the so-called Konkordiaplatz (KK). |
 Oblique aerial photo, 1982 (J. Alean). |  ASTER satellite image, 23. July 2001. Uncropped, much larger version at Planetary Photojournal. |
| Image processing: After selecting the images, each was processed as follows: Contrast and colour rendition improvement by batch processing in Adobe Photoshop (auto colour), noise reduction, colour contrast reduction (the video captures are often oversaturated in colour), cropping (less sky, disstraction by clouds). The movies were assembles using «QuickMovie» shareware. | |