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2010. National Geophysical Data Center. This shapefile contains isodynamic lines (lines of equal total intensity of the Earth's magnetic field), derived from the International Geomagnetic... National Atlas of the United States.
2010. National Geophysical Data Center. This line shapefile shows lines of equal vertical intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference Fie... National Atlas of the United States.
2011. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polyline shapefile depicts most major and minor roads in the nine county San Francisco Bay Area Region, California. These data were created fr... Bay Area Open Space Council.
1997. United States. National Imagery and Mapping Agency. This line shapefile depicts the major rivers in Kenya. These data were created by the U.S. National Imagery and Mapping Agency in 1997. This layer ... United States. National Imagery and Mapping Agency.
2019. Yuba County (Calif.). Information Technology Services. This line shapefile represents major rivers in Yuba County, California. This layer is a part of a collection of data obtained from the Yuba County ... Yuba County (Calif.). Information Technology Services.
1997. Geological Survey of Kenya and International Livestock Research Institute. This line shapefile shows major roads in Kenya. These data were originally produced as a 1:250,000 topographic map by the Geological Survey of Keny... World Resources Institute.
1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, and 1999. Geological Survey (U.S.). This line shapefile portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the i... Geological Survey (U.S.).
2011. Bay Area Open Space Council. This data comes from a variety of sources developed over the years including ESRI data, Department of Transportation, TIGER and counties. It is not... Bay Area Open Space Council.
2020. County of Santa Clara. Geographic Information Services. This polygon shapefile depicts administrative boundaries for cities over which the County of Santa Clara, California holds authority: Campbell, Cup... County of Santa Clara. Geographic Information Services.
2015. Garcia, Paul and Price, Matt. This polyline shapefile depicts major roads in the County of Santa Cruz, California. This layer is part of a collection of GIS data created for San... County of Santa Cruz Information Services Department.