A desktop image processing and photogrammetric method for rapid volcanic hazard mapping: application to air-photo interpretation of Mount Pelée,Martinique |
| |
| Authors: | Glen S Mattioli Pamela E Jansma Lorna Jaramillo Alan L Smith |
| |
| Institution: | (1) Department of Geology, University of Puerto Rico, Mayagüez, Puerto Rico 00681–5000 e-mail: glen@qualibou.upr.clu.edu, PR |
| |
| Abstract: | A desktop image processing and photogrammetric method was developed for digitizing black-and-white aerial photographs. The
technique was applied to airborne optical images of Mt. Pelée, Martinique, a historically active volcano in the tropical Lesser
Antilles island arc, to evaluate its utility for rapid geologic mapping and hazard assessment in vegetated areas. The digital
approach provides several advantages over traditional air-photo interpretation by allowing for change detection in time-series
images, morphologic characterization, development of digital elevation models from stereopairs, and geo-referencing with other
digital data sets. A digital mosaic of Mt. Pelée was created from air photos acquired in 1951, which covered the region affected
by the 1902 eruption. Severe mismatches occurred along edges of adjacent photographs prior to correction, which precluded
quantitative morphologic analysis of the volcanic edifice. Geometric corrections and histogram equalization of digitized air
photos allowed creation of a continuous mosaic. Comparison of the mosaic and a map based on differences in gray scale and
texture to a volcanostratigraphic map revealed that not only the various deposits produced during the 1902 event were easily
differentiated, but that older eruptive products were identified, suggesting that this approach may be used for rapid hazard
evaluation of historically active tropical volcanoes.
Received: 22 January 1996 / Accepted: 26 July 1996 |
| |
| Keywords: | Mt Pelée Aerial photography Volcanic hazard Island arc Lesser Antilles |
| 本文献已被 SpringerLink 等数据库收录！ |
|
