View source for Hydrography data

===Hydrography data===

* '''DDM30''' (Global 30-min Drainage Direction Map)<br>[http://www.geo.uni-frankfurt.de/ipg/ag/dl/forschung/Global_Water_Modeling/DDM30/index.html original data source] | [http://www.geo.uni-frankfurt.de/ipg/ag/dl/forschung/Global_Water_Modeling/DDM30/index.html Download data]
* '''HYDRO1k''' (Global Elevation Derivative Database)<br>[http://eros.usgs.gov/products/elevation/hydro1k.html original data source] | [http://edc.usgs.gov/products/elevation/gtopo30/hydro/index.html Download data]
* '''HydroSHEDS''' (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales)<br>[http://hydrosheds.cr.usgs.gov/ original data source] | [http://gisdata.usgs.net/website/HydroSHEDS/ Download data]
* '''NHD''' (National Hydrography Dataset; USA)<br>[http://nhd.usgs.gov/index.html original data source] | [ftp://nhdftp.usgs.gov/SubRegions Download data]
* '''SWBD''' (Shuttle Radar Topography Mission Water Body Dataset)<br>[http://edc.usgs.gov/products/elevation/swbd.html original data source] | [ftp://e0srp01u.ecs.nasa.gov Download data]