Konstantinos Karantzalos

Konstantinos Karantzalos received the engineering diploma degree from the National Technical University of Athens (NTUA), Athens, Greece, and a PhD in 2007 from NTUA in collaboration with CERTIS, Ecole Nationale de Ponts et Chaussees, Paris, France. In 2007, he joined the Center for Visual Computing of the Department of Applied Mathematics, Ecole Centrale de Paris, Châtenay-Malabry, France. He is currently an associate professor of remote sensing at the NTUA, joining the Remote Sensing Laboratory. His teaching and research interests include geoscience and remote sensing, big data, hyperspectral image analysis, computer vision and pattern recognition, environmental monitoring and precision agriculture. Several... (read more)
2020-09-18 01:14:13

Advanced Urban 3D Modelling and Visualization

A Generic Workflow for Automatic Building Detection and 3D Modelling
The automatic detection, data extraction, 3D modelling and visualization of buildings in urban areas using remote sensing data is an essential task in various applications such as cadastre, urban and rural planning, change detection, mapping, updating geographic information systems, monitoring, housing value and navigation. Even today, this task still remains challenging due to the inherent artefacts (e.g. shadows) in the remote sensing data used, as well as the differences in viewpoints, surrounding environment, complex shape and size of the buildings. This article outlines a generic workflow using modern technologies. Besides the recent developments in image processing, advances in computer vision... (read more)
2020-09-18 01:09:28

Canada Applies Open Data Cube Technology to Assess Nationwide Land-use Change

Canada’s Pollutant Inventories and Reporting Division (PIRD) faces the massive task of creating a greenhouse gas inventory for the entire nation. A key part of this analysis is the use of remotely sensed data to quantify areas of land-use change to calculate CO2. In this pursuit, PIRD has partnered with PCI Geomatics in a project that leverages Open Data Cube technology to enhance the efficiency, accuracy and granularity of analysing enormous volumes of multi-temporal remote sensing data on a nationwide scale. Each year in Canada, thousands of hectares of farm fields and forests are transformed into different land-use classes, most... (read more)
2020-03-11 11:30:31

Establishing an Operational SBAS Down Under

From Test-bed to Operational System
The Australasian region took a major step towards gaining its first-ever satellite-based augmentation system (SBAS) in early 2017. That is when the governments of Australia and New Zealand agreed to fund a two-year test-bed to evaluate the benefits of SBAS technology across a number of industry sectors in the region. The highly successful test-bed ran from 2017 to 2019 and built the case for the governments of both countries to fund an operational SBAS. SBAS is inherently an aviation technology, originally designed to help aircraft with vertical guidance during landing approaches. It was first developed in the USA (WAAS), followed... (read more)
2020-01-21 01:11:16

New Tasmanian Digital Elevation Model

A beta version Digital Elevation Model (DEM) has been constructed for Tasmania (Australia) by MRT geoscientists Dr Claire Kain and Colin Mazengarb, including the most recent Lidar imagery captured during the 2018-19 flying season. With nearly 60% of the state now covered by Lidar, the new dataset provides an increasingly clear view of the landscape that has many applications. The dataset was compiled initially to support two major projects being undertaken by MRT (Mineral Resources Tasmania) and other government agencies. However, as with the previous elevation model (created by the former Forestry Tasmania and shown as a hillshade image on the LIST website),... (read more)
2019-11-14 10:26:44

Watch the Arctic’s Sea Ice Slowly Disappear

Video Included
According to new research, the Arctic’s oldest and thickest ice is more mobile than ice in the rest of the Arctic and is vanishing twice as fast. Researchers have identified what they’re calling the last ice area, a 2,000-kilometre stretch of ocean northwest of Greenland where the Arctic’s summertime sea ice might survive for a few more decades. As reported in Geophysical Research Letters, a biweekly peer-reviewed scientific journal of geoscience published by the American Geophysical Union, sea ice coverage in the Arctic Ocean has declined, on average, by more than one-third from 1984 through 2018. Only in two portions of... (read more)
2019-11-14 09:25:56

InSAR Used to Create Ground Stability Maps

Zooming on a Groundbreaking Revolution
Satellite radar interferometry (InSAR) is a technique that can measure millimetre-scale movement of the ground from space. It does this by comparing the return echoes, and thus the signal-path length, from two or more radar images taken over the same place, over time. Modern InSAR is now used by a range of industries concerned with ground or structural stability, from building development and control, to oil and gas production, to mining, to road and rail management. This article explains some key aspects of InSAR technology, including its innovative use to produce ground stability maps. Phase Shifters InSAR is based upon... (read more)
2019-03-07 05:09:42

CGG Launches MineScope for Insight Throughout the Mining Lifecycle

NPA Satellite Mapping, part of CGG’s Geoscience Division, has launched MineScope, a suite of satellite-derived services that enable mining companies and third-party consultants to make smarter geological, geotechnical and safety-related decisions throughout the mining lifecycle. Mining can involve difficult decisions, operational challenges and risks. Recent tailings dam incidents in Australia and Brazil highlight the need for reliable geospatial intelligence that can strengthen awareness of site activities, geotechnical processes and evolving hazards. MineScope is a comprehensive suite of remotely-captured, geospatial services that can improve exploration efficiency and situational awareness by reducing risk during the planning, auditing and monitoring of mine operations:... (read more)
2019-04-30 05:35:19

Preview: UAV-g 2019

Unmanned aerial vehicles (UAVs or ‘drones’) have become popular instruments for a wide range of emerging applications such as mapping, search & rescue, infrastructure monitoring, precision farming, transport of goods and film-making. The UAV market has been valued at US$130 billion in recent years (source: PWC report 2017) and the outlook remains extremely promising for the years ahead. The economic boom has boosted the scientific and technological development of UAV technologies in the last decade. In this context, UAV-g was initiated in 2011 in Zurich as the ISPRS scientific event dedicated to UAVs in geomatics and remote sensing. Three subsequent... (read more)
2019-04-16 09:27:29

Landsat: the Cornerstone of Global Land Imaging

Advancing the Understanding of Planet Earth
The use of data from Landsat satellites has become a cornerstone of global land imaging with broad societal benefits. More real-time monitoring capability in the future will further our understanding of a changing Earth. The Landsat satellites provide an uninterrupted space-based data record of the Earth’s land surface to help advance scientific research towards understanding our changing planet. In this article, the authors look at how the use of data from Landsat satellites has evolved over time to become a cornerstone of global land imaging with broad societal benefits. They conclude that the Landsat archive is poised to shift into... (read more)
2019-02-20 11:32:34
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