Results 151 to 160 of about 27,606 (334)

Precise topographic mapping using direct georeferencing in UAV

open access: yesIOP Conference Series: Earth and Environment, 2020
Mapping using UAV has become very popular today due to the rapid development of electronic technology. UAVs are needed to support rapid mapping activities, such as natural disaster management, SAR applications, agricultural applications and forest fire ...
A. Syetiawan   +3 more
semanticscholar   +1 more source

Navigating the Measurement Frontier: New Insights Into Small Farm Realities

open access: yesAgricultural Economics, EarlyView.
ABSTRACT Measurement is not only a way of describing complex realities; it can also transform those realities by influencing policies. We live in an era of measurement innovation: new methods to deploy and new ways of adapting familiar, proven strategies to new contexts.
Hope Michelson
wiley   +1 more source

Split-beam echosounder observations of natural methane seep variability in the northern Gulf of Mexico [PDF]

open access: yes, 2015
A method for positioning and characterizing plumes of bubbles from marine gas seeps using an 18 kHz scientific split-beam echo sounder (SBES) was developed and applied to acoustic observations of plumes of presumed methane gas bubbles originating at ...
Beaudoin, Jonathan   +2 more
core   +2 more sources

Archival Aerial Images Georeferencing: A Geostatistically-Based Approach for Improving Orthophoto Accuracy with Minimal Number of Ground Control Points

open access: yesRemote Sensing, 2020
Georeferenced archival aerial images are key elements for the study of landscape evolution in the scope of territorial planning and management. The georeferencing process proceeds by applying to photographs advanced digital photogrammetric techniques ...
Manuela Persia   +4 more
semanticscholar   +1 more source

Closing the air gap: the use of drones for studying wildlife ecophysiology

open access: yesBiological Reviews, EarlyView.
ABSTRACT Techniques for non‐invasive sampling of ecophysiological data in wild animals have been developed in response to challenges associated with studying captive animals or using invasive methods. Of these, drones, also known as Unoccupied Aerial Vehicles (UAVs), and their associated sensors, have emerged as a promising tool in the ecophysiology ...
Adam Yaney‐Keller   +3 more
wiley   +1 more source

Advancements in ecological niche models for forest adaptation to climate change: a comprehensive review

open access: yesBiological Reviews, EarlyView.
ABSTRACT Climate change poses significant challenges to the health and functions of forest ecosystems. Ecological niche models have emerged as crucial tools for understanding the impact of climate change on forests at the population, species, and ecosystem levels.
Wenhuan Xu   +8 more
wiley   +1 more source

Specimens as research objects: reconciliation across distributed repositories to enable metadata propagation

open access: yes, 2018
Botanical specimens are shared as long-term consultable research objects in a global network of specimen repositories. Multiple specimens are generated from a shared field collection event; generated specimens are then managed individually in separate ...
Nicolson, Nicky   +3 more
core   +1 more source

A low cost mobile mapping system (LCMMS) for field data acquisition: a potential use to validate aerial/satellite building damage assessment [PDF]

open access: yes, 2013
Among the major natural disasters that occurred in 2010, the Haiti earthquake was a real turning point concerning the availability, dissemination and licensing of a huge quantity of geospatial data.
Ajmar, Andrea   +5 more
core   +1 more source

A georeferenced Agent-Based Model to analyze the climate change impacts on the Andorra winter tourism [PDF]

open access: yesarXiv, 2011
This study presents a georeferenced agent-based model to analyze the climate change impacts on the ski industry in Andorra and the effect of snowmaking as future adaptation strategy. The present study is the first attempt to analyze the ski industry in the Pyrenees region and will contribute to a better understanding of the vulnerability of Andorran ...
arxiv  

The role of climate and species interactions in determining the distribution of two elevationally segregated species of small mammals through time

open access: yesEcography, EarlyView.
The relative importance of abiotic and biotic factors in determining species distributions has long been of interest to ecologists but is often difficult to assess due to the lack of spatially and temporally robust occurrence records. Furthermore, locating places where potentially highly competitive species co‐occur may be challenging but would provide
Alexandra C. Coconis   +4 more
wiley   +1 more source

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