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Start Over Subject Hydrography Collection U.S. Geological Survey digital data series Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Global GIS : Hydrography danger points

Datasets Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing worldwide navigational hazards or dangers near ocean and navigable lake coastlines and was publishe... American Geological Institute.

2. Global GIS : Larger perennial water bodies and rivers

Datasets Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing larger perennial water bodies and rivers worldwide and was published as part of the USGS Global G... American Geological Institute.

3. Global GIS : Miscellaneous hydrography point features

Datasets Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing worldwide miscellaneous hydrography point features and was published as part of the USGS Global GIS... American Geological Institute.

4. Global GIS : Smaller rivers and streams

Datasets Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing smaller rivers and streams worldwide and was published as part of the USGS Global GIS : global c... American Geological Institute.

5. Global GIS : Springs, wells and dams

Datasets Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing the locations of springs/water holes/wells, dams/weirs, river rapids, and waterfalls worldwide and ... American Geological Institute.