PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING
February 2015
87
PHOTOGRAMME TR I C ENG I NE ER I NG & REMOT E SENS I NG
The official journal for imaging and geospatial information science and technology
February 2015 Volume 81 Number 2
H I GHL I GHT ART I C L E
Kurt Lutz
F EATURE ART I C L E
Y.I Abdel-Aziz and Dr. H.M. Karara
PE ER - REV I EWED ART I C L ES
Gang Hong, Shusen Wang, Junhua Li,
and
Jingfeng Huang
A new methodology to include entropy (H), angle (α), and total scattered power (Span)
as inputs in SVM classification for crop type identification.
Jeffery A. Thompson, David. J. Paull,
and
Brian G. Lees
A simple method for addressing snow/cloud confusion with MODIS and investigates
scale-related inaccuracies in the MODIS snow products.
Rajagopalan Rengarajan, Aparajithan Sampath, James Storey,
and
Michael Choate
The methodology and results of validation of the geometric accuracy of Global Land
Survey (GLS) 2000 data are described.
Zhuoting Wu, Barry Middleton, Robert Hetzler, John Vogel,
and
Dennis Dye
Multiple indices from the Landsat-8 satellite at 30-meter resolution, and canopy maps
from WorldView-2 satellites at 0.5-meter resolution were used to assess vegetation burn
severity of the Creek Fire on the San Carlos Apache Reservation in Arizona.
Honglei Zhu, Ying Li, Zhaoli Liu,
and
Bolin Fu
A population distribution model for a county area in China using
impervious surfaces and demographic information and distribute population data across
space in Fujin County, Heilongjiang Province, China.
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By analyzing old
photographs from the
early 1900s and comparing
them with contemporary
ones, researchers have
mapped the retreat of some
Greenland glaciers.
In the example above,
the images show changes
to a glacier in the vicinity of
the Sukkertoppen ice cap
in southwest Greenland.
By summer 2013 (top),
the glacier had retreated
by about 3 kilometers (less than two miles) since summer
1935 (bottom), according to researcher Anders Bjørk of the
Natural History Museum of Denmark. Both photographs
were acquired from aircraft, most recently in an effort
by Bjørk and colleagues to re-photograph the sites of
Greenland’s fast-changing glaciers. (Note that the 2013
photo was shot from slightly farther away or a different
focal length, so it is better to gauge the ice changes by
looking at shoreline features.)
The historic photographs studied by Bjørk’s team showed
a remarkably quick retreat between 1900 and 1930—more
rapid than in the past 15 years. The Little Ice Age had lost
its grip on the region and temperatures climbed. As the
Arctic climate warms again, the information from historic
photographs should help researchers understand how
quickly glaciers can react to temperature changes.
Images courtesy Anders Bjørk, copyright of the Natural
History Museum of Denmark/Tholstrup (top) and Danish
Geodata Agency (bottom). For more information on this
image, visit
.
php?id=84893.
