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491. U.S. ZIP Code Areas 2000
1999. Geographic Data Technology, Inc. (GDT). U.S. ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a fi... Environmental Systems Research Institute, Inc. (ESRI).
492. U.S. ZIP Code Points 2000
1999. Geographic Data Technology, Inc. (GDT). U.S. ZIP Code Points represents five-digit ZIP Code areas as points by placing the location using delivery based centroids and those ZIP Codes that... Environmental Systems Research Institute, Inc. (ESRI).
493. Utah Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Utah Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Utah. Environmental Systems Research Institute, Inc. (ESRI).
494. Vermont Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Vermont Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Vermont. Environmental Systems Research Institute, Inc. (ESRI).
495. Vernal Pools: Holland's Central Valley, Russian River Basin, California, 1998
1999. Circuit Rider Productions. This polygon shapefile was derived from the U.S. Fish and Wildlife Service and California Department of Fish and Game's Holland's Central Valley Ve... Circuit Rider Productions.
496. Virginia Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Virginia Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Virginia. Environmental Systems Research Institute, Inc. (ESRI).
497. Washington Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Washington Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Washington. Environmental Systems Research Institute, Inc. (ESRI).
498. Water Data Storage and Retrieval System Daily Value Summaries: Russian River Basin, California, 2000-2002
1999. Circuit Rider Productions. This shapefile is a point representation of observations contained in the USGS WATSTORE Daily Values file, as well as remarks and other data from U... Circuit Rider Productions.
499. Waterbody Reach: Russian River Basin, California, 1999-2002
1999. Circuit Rider Productions. The polygon features were selected based on their spatial location within the extent of the Russian River basin and contains reach codes for networ... Circuit Rider Productions.
500. West Virginia Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). West Virginia Major Roads represents interstate, U.S., and state highways and other major thoroughfares within West Virginia. Environmental Systems Research Institute, Inc. (ESRI).