Agyekum, Michael Kyei; Zimmer, Martin; Mackay, Fiona; Weerts, Steven; Helfer, Véronique: Canopy gap distribution in South African mangrove forests from 1997 to 2020 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965469 (dataset in review)
Abstract:
The dataset contains information on the status, sizes, and geographical range of canopy gaps in South Africa's largest mangrove forest stand at uMhlathuze, which accounts for 80% of the total mangrove coverage in the country, near Richards Bay. It also includes a smaller mangrove stand in Beachwood near Durban in the KwaZulu-Natal province. The dataset was created using a combination of very high-resolution satellite images (e.g., "CNES/AIRBUS," "Maxar," and "NASA" satellite imageries accessed through Google Earth Pro Version 7.3.3) and aerial photographs (CSIR Aerial Photograph) that were delineated using on-screen digitizing polygon tools in Google Earth Pro Version 7.3.3 and create feature polygon geometry tool in ArcMap saved into a single shapefile. The gaps were labeled with the status of "open," "recovering," or "closed" to identify each gap and document its development over time. The gap geographical coordinates and gap size were extracted using the "calculate" geometry tool within ArcMap 10.5.
Supplement to:
Agyekum, Michael Kyei; Zimmer, Martin; Mackay, Fiona; Weerts, Steven; Helfer, Véronique (in review): Spatial and temporal pattern of mangrove forest canopy gaps: What do we learn from South Africa? Bulletin of Marine Science
Coverage:
Median Latitude: -28.879704 * Median Longitude: 31.952654 * South-bound Latitude: -29.802403 * West-bound Longitude: 31.041975 * North-bound Latitude: -28.798000 * East-bound Longitude: 32.035000
Date/Time Start: 1997-10-20T00:00:00 * Date/Time End: 2020-08-13T00:00:00
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Agyekum, Michael Kyei | |||
| 2 | LATITUDE | Latitude | Agyekum, Michael Kyei | Calculate geometry tool, Esri, ArcMap version 10.5 | Geocode | |
| 3 | LONGITUDE | Longitude | Agyekum, Michael Kyei | Calculate geometry tool, Esri, ArcMap version 10.5 | Geocode | |
| 4 | Date/time start | Date/time start | Agyekum, Michael Kyei | open or recovering | ||
| 5 | Date/time end | Date/time end | Agyekum, Michael Kyei | closed or remained opened/recovering by the last satellite image | ||
| 6 | Mangrove, canopy gap status | Mangrove canopy gap status | Agyekum, Michael Kyei | Observation (OBSE) | at Date/time end | |
| 7 | Mangrove, canopy gap area | Mangrove canopy gap area | m2 | Agyekum, Michael Kyei | Calculate geometry tool, Esri, ArcMap version 10.5 | at Date/time end |
| 8 | Data source | Data source | Agyekum, Michael Kyei |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 4 (ProcLevel4)
Size:
1555 data points