2010. National Geophysical Data Center. This shapefile shows lines of equal annual change (secular variation) in the inclination of the Earth's magnetic field, derived from the Internatio... National Atlas of the United States.
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2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation), in the total field intensity of the Earth's magnetic field, derived fro... National Atlas of the United States.
2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation) in the vertical component of the total field intensity of the Earth's ma... National Atlas of the United States.
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.
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.).
47. Map of Kansas
1869. Sinclair, W. T. Includes rivers & streams, the 6th Principal Meridian, existing & projected railroads, the Union Pacific Railway Eastern Division land grant, count... Mills & Smith (Topeka, Kan).
1899. United States. General Land Office. Title on lower margin: Oklahoma. 45 x 42 centimeters Scale 1:760, 320 General Map Collection. The Office (Washington, D.C).
1898. United States. General Land Office. Relief shown by hachures. 61 x 91 centimeters (on sheet 69 x 96 centimeters.) Scale 1:760,320 General Map Collection. (Washington, D.C.], ).
2004. National Atlas of the United States. This polygon shapefile portrays county level data for the fiscal-year-2004 National Fire Plan - Hazardous Fuels Reduction Program. The purpose of t... National Atlas of the United States.