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1. Landcover Change: Russian River Basin, California, 2002

1991. Circuit Rider Productions. This polygon shapefile depicts increases and decreases in vegetative cover over 5 year periods in the Russian River Watershed region of California.... Circuit Rider Productions.

2. North American Countries, 2014

1991. Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile contains the boundaries for Canada, Mexico, Greenland, the Dominican Republic, Cuba, Haiti, the Bahamas and Jamaica. This la... Environmental Systems Research Institute (Redlands, Calif.).

3. United States Airports, 1991-2014

1991. TomTom International (Firm) and Environmental Systems Research Institute (Redlands, Calif.). Thisw polygon shapefile represents airport grounds and airport runways within the United States. All airports have a boundary, and most have at lea... Environmental Systems Research Institute (Redlands, Calif.).

4. World Time Zones, 1991-2011

1991. Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the time zones of the world. The time zones are best displayed with World Countries or World Administrative Divis... Environmental Systems Research Institute (Redlands, Calif.).

5. 1991 Block Boundaries of India

1991. This layer is a polygon theme representing block boundaries of India for 1991 and includes socio-demographic Census attribute data such as total po... ML InfoMap (Firm).

6. 1991 District Boundaries of India

1991. This layer is a polygon theme representing district boundaries of India for 1991. Includes district socio-demographic Census attribute data such as... ML InfoMap (Firm).

7. 1991 State Boundaries of India

1991. This layer is a polygon theme representing state boundaries of India for 1991 and includes socio-demographic Census attribute data such as total po... ML InfoMap (Firm).

8. 1991 Sub District Boundaries of India

1991. This layer is a polygon theme representing sub district boundaries of India for 1991. Includes district socio-demographic Census attribute data suc... ML InfoMap (Firm).

9. District Boundaries of India, 1991

1991. ML InfoMap (Firm). This layer is a polygon theme representing district boundaries of India for 1991. Includes district socio-demographic Census attribute data such as... ML InfoMap (Firm).

10. State Boundaries of India, 1991

1991. ML InfoMap (Firm). This layer is a polygon theme representing state boundaries of India for 1991 and includes socio-demographic Census attribute data such as total po... ML InfoMap (Firm).