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This polygon coverage depicts historical vegetation in the Rogue, lower Applegate, and Illinois valleys, Oregon. It is based on land survey data recorded by General Land Office (GLO) surveyors between 1854 and 1919, including township and section line data.
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This represents historical reference conditions for old tallgrass and wet prairie areas. Thus, offers information toward ecological land management efforts.These data represent the areas that the US GLO land surveyors and French/Spanish surveyors considered to be prairie in Missouri.
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This polygon coverage depicts historical vegetation in the Willamette Valley, Oregon, and portions of the Columbia River floodplain in Oregon. It is based on land survey data recorded by General Land Office (GLO) surveyors between 1851 and 1910, including township and section line data.


    map background search result map search result map Willamette Valley Pre-Settlement Vegetation 19th century GLO historical vegetation of central Rogue, lower Applegate, and upper Illinois Valleys, Oregon, 1854-1919. Missouri - Historic Prairie GLO historical vegetation of central Rogue, lower Applegate, and upper Illinois Valleys, Oregon, 1854-1919. Willamette Valley Pre-Settlement Vegetation 19th century Missouri - Historic Prairie