River channel migration and characteristics from 1988 to 2019 at 74 bridges in the Philippines
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Identification info
- Metadata Language
- English (en)
- Character set
- utf8
- Dataset Reference Date ()
- 2020-12-17
- Identifier
- doi: / 10.5285/2efd24f9-e745-4f54-8bbd-6439b0ad93e5
- Other citation details
- Boothroyd, R.J., Williams, R.D., Hoey, T.B., Tolentino, P.L.M., Yang, X. (2020). River channel migration and characteristics from 1988 to 2019 at 74 bridges in the Philippines. NERC Environmental Information Data Centre 10.5285/2efd24f9-e745-4f54-8bbd-6439b0ad93e5
- Limitations on Public Access
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- no limitations
- Use constraints
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- Use constraints
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- If you reuse this data, you should cite: Boothroyd, R.J., Williams, R.D., Hoey, T.B., Tolentino, P.L.M., Yang, X. (2020). River channel migration and characteristics from 1988 to 2019 at 74 bridges in the Philippines. NERC Environmental Information Data Centre https://doi.org/10.5285/2efd24f9-e745-4f54-8bbd-6439b0ad93e5
- Spatial representation type
- vector
- Distance
- 5 urn:ogc:def:uom:EPSG::9001
- Topic category
-
- Structure
- Inland waters
- Begin date
- 1988-01-01
- End date
- 2019-12-31
- Code
- WGS 84
Distribution Information
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Comma-separated values (CSV)
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- Quality Scope
- dataset
- Other
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Bridge characteristics were derived from a geospatial database of Philippine bridges retrieved in April 2020 from the Detailed Bridge Inventory Application (DPWH, 2020). The database was filtered to include only permanent bridges where the bridge deck length was equal to or greater than 200 m (n = 256). A visual inspection was performed to ensure that bridges were located at contemporary river crossings (n = 182) and only those bridges where the active river channel width exceeded 150 m (equivalent to five Landsat pixels) were retained for analysis (n = 74). Stream network and geomorphology characteristics were derived from a nationwide digital elevation model (DEM) acquired in 2013 and generated through airborne Interferometric Synthetic Aperture Radar, with a 5 m spatial resolution and 1 m root-mean-square error vertical accuracy (Grafil and Castro, 2014) was used for topographic analysis and extraction of the stream network. Google Earth Engine (GEE) was used to extract active river channel masks from Landsat 5, 7 and 8 satellite imagery. The workflow contained three main processing steps: (i) cloud masking and temporal compositing; (ii) active river channel classification; and, (iii) cleaning and image export.
Metadata
- File identifier
- 2efd24f9-e745-4f54-8bbd-6439b0ad93e5 XML
- Metadata Language
- English (en)
- Character set
- ISO/IEC 8859-1 (also known as Latin 1)
- Resource type
- dataset
- Hierarchy level name
- dataset
- Metadata Date
- 2024-02-08T17:39:15
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3