DEM Digital Elevation Model
30 m DEM
SRTM at CGIAR-CSI
90 m DEM and re-sampled 250 m, 500 m, and 1km DEM
NOAA’s online coastline extractor is no longer recommended to use. Instead, download GSHHG in binary file and manipulate it on a software geodas-ng. Also GEODASS coastlines may be downloaded and processed using geodas-ng. geodas-ng can draw a map of specified lon & lat ranges and then export it in a various file format, including GMT text format and ESRI shape file format.