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Charting Dynamic Areas in the Mackenzie River with RADARSAT-2, Simulated RADARSAT Constellation Mission and Optical Remote Sensing Data
- Source :
- Remote Sensing, Volume 11, Issue 13, Remote Sensing, Vol 11, Iss 13, p 1523 (2019)
- Publication Year :
- 2019
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2019.
-
Abstract
- Mariners navigating within Canadian waters rely on Canadian Hydrographic Service (CHS) navigational charts to safely reach their destinations. To fulfil this need, CHS charts must accurately reflect the current state of Canadian coastal regions. While many coastal regions are stable, others are dynamic and require frequent updates. In order to ensure that important and potentially dangerous changes are reflected in CHS products, the organization, in partnership with the Canadian Space Agency, is exploring coastal change detection through satellite remote sensing (SRS). In this work, CHS examined a hybrid shoreline extraction approach which uses both Synthetic Aperture Radar (SAR) and optical data. The approach was applied for a section of the Mackenzie River, one of Canada&rsquo<br />s most dynamic river systems. The approach used RADARSAT-2 imagery as its primary information source, due to its high positioning accuracy (5 m horizontal accuracy) and ability to allow for low and high water line charting. Landsat represented the primary optical data source due to its long historical record of Earth observation data. Additional sensors, such as Sentinel-2 and WorldView, were also used where a higher resolution was required. The shoreline extraction process is based on an image segmentation approach that uses both the radar and optical data. Critical information was collected using the automated approach to support chart updates, resulting in reductions to the financial, human and time factors present within the ship-based hydrographic survey techniques traditionally used for chart improvements. The results demonstrate the potential benefit of wide area SRS change detection within dynamic waterways for navigational chart improvements. The work also demonstrates that the approach developed for RADARSAT-2 could be implemented with data from the forthcoming RADARSAT Constellation Mission (RCM), which is critical to ensure project continuity.
- Subjects :
- Synthetic aperture radar
Earth observation
010504 meteorology & atmospheric sciences
Computer science
Canadian Hydrographic Service
0211 other engineering and technologies
rate of change
02 engineering and technology
01 natural sciences
law.invention
Hydrographic survey
Chart
law
optical data
dynamic areas
Radar
lcsh:Science
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Remote sensing
charts
Remote sensing (archaeology)
Radarsat
RCM
General Earth and Planetary Sciences
lcsh:Q
crowdsourcing
Hydrography
Change detection
Subjects
Details
- Language :
- English
- ISSN :
- 20724292
- Database :
- OpenAIRE
- Journal :
- Remote Sensing
- Accession number :
- edsair.doi.dedup.....f61fb57f091be56afaf77d205ca5e208
- Full Text :
- https://doi.org/10.3390/rs11131523