scholarly journals Feasibility of Invasive Grass Detection in a Desertscrub Community Using Hyperspectral Field Measurements and Landsat TM Imagery

2011 ◽  
Vol 3 (10) ◽  
pp. 2283-2304 ◽  
Author(s):  
Aaryn D. Olsson ◽  
Willem J.D. van Leeuwen ◽  
Stuart E. Marsh
Keyword(s):  
Field Measurements ◽  
Landsat Tm ◽  
Invasive Grass ◽  
Landsat Tm Imagery

Detection of forest harvest type using multiple dates of Landsat TM imagery

2002 ◽  
Vol 80 (3) ◽  
pp. 385-396 ◽  
Author(s):  
Emily Hoffhine Wilson ◽  
Steven A Sader
Keyword(s):  
Landsat Tm ◽  
Forest Harvest ◽  
Landsat Tm Imagery

scholarly journals Recession of the southern part of Barnes Ice Cap, Baffin Island, Canada, between 1961 and 1993, determined from digital mapping of Landsat TM

1997 ◽  
Vol 43 (143) ◽  
pp. 98-102 ◽  
Author(s):  
John D. Jacobs ◽  
Élizabeth L. Simms ◽  
Alvin Simms
Keyword(s):  
Regional Climate ◽  
Landsat Tm ◽  
Early 20Th Century ◽  
Baffin Island ◽  
Digital Mapping ◽  
Ice Cap ◽  
Significant Difference ◽  
Southern Half ◽  
Landsat Tm Imagery ◽  
General Reduction

AbstractChanges along the margin of the southern half of the 5900 km2 Barnes Ice Cap have been assessed using 1993 Landsat TM imagery in comparison with digitized 1:50 000 NTS maps based on 1961 photogrammetry. The average recession over the 183 km long southern perimeter was found to be at least 4 m a−1, with no significant difference between the southeast and southwest sectors. Viewed in conjunction with the sustained retreat previously reported for the northwest margin, these results indicate that a general reduction in the size of Barnes Ice Cap is occurring. The present retreat phase began under a regional climate warming in the late 19th to early 20th century period and continues, while the record of the ablation-season temperature since the mid-century has not shown any significant trend.

scholarly journals Mapping forest fire impact from Landsat-TM imagery

1998 ◽  
Author(s):  
Agustin Lobo ◽  
Nicolau Pineda ◽  
Rafael Navarro-Cedillo ◽  
Pilar Fernandez-Rebollo ◽  
Francisco J. Salas ◽  
...  
Keyword(s):  
Forest Fire ◽  
Landsat Tm ◽  
Landsat Tm Imagery ◽  
Fire Impact

scholarly journals Digital comparison of high resolution Sojuzkarta KFA-1000 imagery of ice masses with Landsat and SPOT data

1993 ◽  
Vol 17 ◽  
pp. 105-112 ◽  
Author(s):  
J.A. Dowdeswell ◽  
M.R. Gorman ◽  
Yu.Ya Macheret ◽  
M.Yu. Moskalevsky ◽  
J.O. Hagen
Keyword(s):  
High Resolution ◽  
Landsat Tm ◽  
Digital Data ◽  
Absolute Calibration ◽  
Polar Regions ◽  
Ice Surface ◽  
Very High Spatial Resolution ◽  
Clear Identification ◽  
Pixel Brightness ◽  
Landsat Tm Imagery

Russian satellite imagery of the polar regions has recently become available to western scientists through Sojuzkarta. The KFA-1000 photographic camera is of particular interest to glaciologists due to its high resolution (a nominal 5 m). Digitized photographic products from this instrument are compared with digital data from Landsat and SPOT series satellites for a partly glacierized area of northwest Spitsbergen. Comparison of KFA-1000 data with detailed maps of man-made structures at the settlement of Ny Ålesund demonstrates that the resolution of the photographic imagery is about 3 m, but scanner resolution limited our digital data to about 6 m. Significantly less detail can be resolved on Landsat TM imagery and Landsat MSS data fail to resolve any of the structures. KFA-1000 data are compared with Landsat TM and MSS images and SPOT HRV multispectral imagery for several tidewater glaciers in Spitsbergen. KFA-1000 imagery is of a significantly higher geometric resolution than the other sensors, allowing the clear identification of individual crevasses and other ice surface features. KFA-1000 scenes from 1985 and 1988 are used to measure ice marginal fluctuations for several northwest Spitsbergen glaciers, and the onset of a surge can also be identified. This imagery has a 60% overlap between scenes and the heighting accuracy of the stereoscopic data is calculated at 45 m. Radiometric analysis of KFA-1000 data is restricted to relative brightness values, since no absolute calibration is available. The photographic products appear speckled, and the range and standard deviation of normalized pixel brightness values over snow is greater than for equivalent Landsat TM data. The very high spatial resolution of the KFA-1000 camera is its principal attraction for glaciologists.

A strategy for mapping Canada's Forest biomass with Landsat TM imagery

2003 ◽  
Author(s):  
J.E. Luther ◽  
R.A. Fournier ◽  
R.J. Hall ◽  
C.-H. Ung ◽  
L. Guindon ◽  
...  
Keyword(s):  
Forest Biomass ◽  
Landsat Tm ◽  
Landsat Tm Imagery
Sign in / Sign up

Export Citation Format

Share Document