Results 31 to 40 of about 36,775,918 (294)
A Quaternion-Based Piecewise 3D Modeling Method for Indoor Path Networks
ISPRS International Journal of Geo-Information, 2019 Generating 3D path models (with textures) from indoor paths is a good way to improve the visualization performance of 3D indoor path analysis. In this paper, a quaternion-based piecewise 3D modeling method is proposed to automatically generate highly ...
Hongdeng Jian +4 more
doaj +1 more source
Innovation in geoprocessing for a Digital Earth [PDF]
International Journal of Digital Earth, 2017 Online geoprocessing, the provision and the use of spatial analysis functionality on the Web, is a powerful technological approach to fully realise the vision of a Digital Earth.
Barbara Hofer +2 more
openaire +4 more sources
Remote Sensing, 2015 Mixed pixels are common in hyperspectral remote sensing images. Endmember extraction is a key step in spectral unmixing. The linear spectral mixture model (LSMM) constitutes a geometric approach that is commonly used for this purpose.
Xu Sun +4 more
doaj +1 more source
International Journal of Digital Earth, 2014 Human beings have entered the age of ‘big data’. From 2005 to 2020, the digital universe is expected to grow by a factor of 300, from 130 exabytes to 40,000 exabytes, or 40 trillion gigabytes.
openaire +1 more source
Defining a Digital Earth System [PDF]
Transactions in GIS, 2008 AbstractIn a 1998 speech before the California Science Center in Los Angeles, then US Vice‐President Al Gore called for a global undertaking to build a multi‐faceted computing system for education and research, which he termed “Digital Earth.” The vision was that of a system providing access to what is known about the planet and its inhabitants ...
Karl E. Grossner +2 more
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Remote Sensing, 2018 Solar-induced chlorophyll fluorescence (SIF) is closely linked to the photosynthesis of plants and has the potential to estimate gross primary production (GPP) at different temporal and spatial scales.
Jiaochan Hu +4 more
doaj +1 more source
Annals of GIS, 2012 The concept of Digital Earth as a digital replica of the planet has its roots in science fiction, in the writings of environmental visionaries, and in a speech prepared for delivery by Vice President Gore in 1998. Five use cases are identified that together comprise the vision of Digital Earth: a geoportal, a visualization service, a platform for ...
openaire +1 more source
Extraction of Glacial Lake Outlines in Tibet Plateau Using Landsat 8 Imagery and Google Earth Engine
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017 Glacial lake outburst floods (GLOFs) are among the most serious natural hazards in high mountain regions in the last several decades. The recent global warming has caused dramatic glacial lake changes and increased potential GLOF risk, particularly in ...
Fang Chen +3 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Adult survivors of childhood acute lymphoblastic leukemia (ALL) are at risk of reduced exercise capacity, decreased physical activity levels, persistent fatigue, and neurocognitive deficits. The aim was to investigate exercise capacity and physical activity levels of adult survivors of childhood ALL and their associations with ...
Laura Jess +5 more
wiley +1 more source
Accuracy evaluation and comparison of GPM and TRMM precipitation product over Mainland China
Shui kexue jinzhan, 2018 For evaluating the accuracy of the remotely sensed precipitation products of Tropical Rainfall Measuring Mission 3B42 (TRMM) and latest-generation Global Precipitation Measurement IMERG (GPM), four commonly used error metrics (R, ERMS, EMA and ER) and ...
LI Qilun +4 more
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