Water Body Masks

ASTWBD--ASTER water body mask (GeoTIFF)

• https://search.earthdata.nasa.gov/search/granules?p=C1575734433-LPDAAC_ECS&pg[0][v]=f&pg[0][gsk]=-start_date&q=water%20body&tl=1630777380.182!3!!!!
• Abrams, M.; Crippen, R.; Fujisada, H. ASTER Global Digital Elevation Model (GDEM) and ASTER Global Water Body Dataset (ASTWBD). Remote Sens. 2020, 12, 1156. https://doi.org/10.3390/rs12071156
• 22,912 files, which are zipped with very good compression.  Uncompressed they get very large
• Two grids for each tile
  • ASTWBDV001_N25E097_att.tif : classification of each water pixel
  • ASTWBDV001_N25E097_dem.tif: elevation of each water pixel

MERIT 2 water masks, based on Landsat and OSM (GeoTIFF)

• 3"x3" pixels
• Does not cover some islands (e.g. El Hiero)
• http://hydro.iis.u-tokyo.ac.jp/~yamadai/G3WBM/index.html
• http://hydro.iis.u-tokyo.ac.jp/~yamadai/OSM_water/index.html
  

SRTM water mask (vector shapefiles, polygons)

• https://www.usgs.gov/centers/eros/science/usgs-eros-archive-digital-elevation-shuttle-radar-topography-mission-water-body?qt-science_center_objects=0#qt-science_center_objects
• Does not cover high latitudes
• Created from Landsat, so it is at least semi-independent from the SRTM DEM
• Two different file naming schemes
  • DVD distributed early 2000's
  • Current files on USGS web site

Global Shoreline Vector (GSV) (vector shapefiles, polygons)

• Sayre, R., S. Noble, S. Hamann, R. Smith, D. Wright, S. Breyer, K. Butler, K. Van Graafeiland, C. Frye, D. Karagulle, D. Hopkins, D. Stephens, K. Kelly, Z, basher, D. Burton, J. Cress, K. Atkins, D. van Sistine, B. Friesen, B. Allee, T. Allen, P. Aniello, I Asaad, M. Costello, K. Goodin, P. Harris, M. Kavanaugh, H. Lillis, E. Manca, F. Muller-Karger, B. Nyberg, R. Parsons, J. Saarinen, J. Steiner, and A. Reed. 2018. A new 30 meter resolution global shoreline vector and associated global islands database for the development of standardized global ecological coastal units. Journal of Operational Oceanography – A Special Blue Planet Edition. DOI:10.1080/1755876X.2018.1529714. https://doi.org/10.1080/1755876X.2018.1529714   
• Interpolation of 2014 satellite imagery
• https://rmgsc.cr.usgs.gov/gie/
• Data is ESRI mpk files (some monstrously big), which QGIS might be able to read
• I have been unable to find the actual coastlines

Coastlines it might be possible to use these, which are mostly lines, and they might close for islands.  For the continental coastlines these might be a challenge.

Last revision 9/17/2021