DEM and Coastline data

DEM Digital Elevation Model

ASTER GDEM

30 m DEM

SRTM at CGIAR-CSI

90 m DEM and re-sampled 250 m, 500 m, and 1km DEM

Coastline Data

NOAA GEODASS

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.