Sentences with phrase «studied aerial photographs»

That's the message coming out of the U.S. Geological Survey, which studied aerial photographs of a handful of Pennsylvania counties where gas companies are using hydraulic fracturing to tap deposits in the Marcellus Shale.

Not exact matches

Scientists have used old aerial surveys to chart surface changes in the Arctic and Antarctic, for example by studying photographs of Greenland's glaciers to document their history.

Using aerial survey photographs, the authors of this study assessed the presence, number, and total area of gull - inflicted lesions on 2680 living mother - calf pairs in 1974 - 2011 and ~ 200 stranding photographs of dead calves in 2003 - 2011 around Península Valdés, Argentina.

As part of the 2017 study, Neffra Matthews of the BLM's National Operations Center in Denver, helped survey, map and document the trackway using photogrammetry, which helps scientists perform accurate measurements based on land - based or aerial photographs.

The Royal Commission on Historic Monuments in England was asked to take aerial photographs of the site, and Buckland sought permission for students to carry out palaeoecological studies on the moors.

One study in 2011 using aerial photographs concluded that many of the glaciers in Wind River lost on average 38 percent of their surface area over the latter half of the 20th century.

This week in the journal Nature, Csatho writes a «News and Views» analysis that comments on the latest research in this area: A new study in Nature by Kristian K. Kjeldsen, Niels J. Korsgaard, Kurt H. Kjær and colleagues, who used aerial photographs, remote - sensing observations and geological evidence to estimate the Greenland Ice Sheet's mass loss during three time periods since the start of the 20th century: 1900 - 83, 1983 to 2003 and 2003 - 10.

Large collections of aerial and ground photographs can be used to study historic changes in some glaciers (see Repeat Photography of Glaciers in the Glacier Photograph Collection).