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SURFACE COLORING OF GLACIERS FOR AIR PHOTOGRAPHY
- Source :
- Canadian Journal of Earth Sciences; November 1966, Vol. 3 Issue: 6 p877-880, 4p
- Publication Year :
- 1966
-
Abstract
- To make glacier mapping possible in white firn areas where stereo-effect is difficult to obtain, a large number of surface markers were placed on the glacier before air photographs were taken. Experiments proved that 3- to 5-kg powdered dye (yellow or brown ochre, or lamp black), packed in paper bags, made excellent surface markers when thrown from between 50- and 100-m elevation above the glacier surface. Color circles, applied by hand, also proved to be a good means for identifying ablation stakes, etc., in the firn area. An example of a map is given where the construction of contour lines was based upon the easily determinable dye markers that were clearly visible on vertical photographs taken from 7 300-m altitude.
Details
- Language :
- English
- ISSN :
- 00084077 and 14803313
- Volume :
- 3
- Issue :
- 6
- Database :
- Supplemental Index
- Journal :
- Canadian Journal of Earth Sciences
- Publication Type :
- Periodical
- Accession number :
- ejs31626806
- Full Text :
- https://doi.org/10.1139/e66-069