1991. Powell, Susan and Navarro, Fernando. This line dataset represents the locations of irrigation canals in Mongolia in 1991. Irrigation canals are listed as a type of "nature protection m... UC Berkeley Library.
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2014. Stanislaus County (Calif.). This polyline dataset represents existing canals in Stanislaus County, California for 2014.
2004. Santa Clara Valley Water District (Calif.). This polyline dataset identifies all existing creeks and canals within Santa Clara County, California for 2004. Layer created by Santa Clara Valley...