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Lower Mississippi River Circa 1899 Map of the alluvial valley of the Mississippi River from the head of St. Francis Basin to the Gulf of Mexico, showing lands subject to overflow, location of levees and trans-alluvial profiles Downloaded from: https://www.digitalcommonwealth.org/search/commonwealth:7h14b0450 Edited (to correct position of panels) and georeferenced by Yvonne Allen (USFWS) to geographic NAD1927 using ArcGIS , 3rd order polynomial and 80 ground control points using lat lon grid only. RMS=0.00408 SERVICE DEFINITION FILE ONLY For Geographic NAD 27 geotiff see: https://www.sciencebase.gov/catalog/item/58f66491e4b0bd52222f7821 Categories: Data, Map; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Lower Mississippi River, floodplain Lower Mississippi River Historical Floodplain - circa 1899 Map of the alluvial valley of the Mississippi River from the head of St. Francis Basin to the Gulf of Mexico, showing lands subject to overflow, location of levees and trans-alluvial profiles Downloaded from: https://www.digitalcommonwealth.org/search/commonwealth:7h14b0450 Edited (to correct position of panels) and georeferenced by Yvonne Allen (USFWS) to geographic NAD1927 using ArcGIS , 3rd order polynomial and 80 ground control points using lat lon grid. SERVICE DEFINITION FILE ONLY For geographic NAD27 geotiff see: https://www.sciencebase.gov/catalog/item/58f66491e4b0bd52222f7821 Categories: Data, Map; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: LMR, Lower Mississippi River, floodplain