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Start Over Author United States. National Imagery and Mapping Agency Place Eastern Hemisphere Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Global GIS : Airfields

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

2. Global GIS : Aqueducts, canals, flumes, penstocks

Datasets Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing major roads worldwide and was published as part of the USGS Global GIS : global coverage databas... American Geological Institute.

3. Global GIS : Country political boundaries

Datasets Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing country political boundaries worldwide and was published as part of the USGS Global GIS : global ... American Geological Institute.

4. 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.

5. Global GIS : Land ice areas

Datasets Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing land ice areas (snow fields or ice fields which are on land) worldwide and was published as part ... American Geological Institute.

6. Global GIS : Large urban areas

Datasets Harvard University Restricted content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing large urban areas (built-up areas) worldwide and was published as part of the USGS Global GIS : g... American Geological Institute.

7. 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.

8. 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.

9. Global GIS : Miscellaneous industry points

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