Index of ftp://ftp.igsb.uiowa.edu/GIS_Library/IA_State
Parent Directory
Admin_Political_Boundary
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Agriculture
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Biologic_Ecologic
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Climatic
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Cultural_Demographic
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Elevation
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Environmental_Regulation
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Geographic
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Geologic
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Hydrologic
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Infrastructure
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Land_Description
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Recreation
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Watersheds
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