Publication Date:
2019-07-13
Description:
The author has identified the following significant results. Field observations and data collected by low flying aircraft were used to verify the accuracy of maps produced from the satellite data. Although areas of vegetation as small as six acres can accurately be detected, a white pine stand that was severely damaged by sulfur dioxide could not be differentiated from a healthy white pine stand because spectral differences were not large enough. When winter data were used to eliminate interference from herbaceous and deciduous vegetation, the damage was still undetectable. The analysis was able to produce a character map that accurately delineated areas of vegetative alteration due to high zinc levels accumulating in the soil. The map depicted a distinct gradient of less damage and alteration as the distance from the smelter increased. Although the satellite data will probably not be useful for detecting small acreages of damaged vegetation, it is concluded that the data may be very useful as an inventory tool to detect and delineate large vegetative areas possessing differing spectral signatures.
Keywords:
EARTH RESOURCES AND REMOTE SENSING
Type:
E75-10368
,
NASA-CR-143226
,
ORSER-SSEL-TR-19-74
,
Ann. Meeting of the Phytopathological Soc. and the 40th Sess. of the Can. Phytopathological Soc.; Aug 11, 1974 - Aug 15, 1974; Vancouver, B. C.; Canada
Format:
application/pdf
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