1997. Swithinbank, Williams, Ferrigno. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Geologic Investigations Series. United States Geological Survey.
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1997. Frushour, Samuel S., Harper, Denver, Kersey, Rea Williams, and Powell, Richard L. This map data was compiled in 1997 from information available at the time, but was unpublished until until 2002; the map does not reflect any chang... Indiana Geological Survey.
1997. Please note ... only major highway and interstate improvement projects are included in this brochure. Information is accurate as of February 1, 199... Indiana Dept. of Transportation.
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.
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.
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.
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.
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.
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.
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.