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Mississippi River Commission","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"creator","dcterms":"creator"}},{"name":"cartographicScale","value":"Scale 1:250,000","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"publicationPlace","value":"Washington (D.C.)","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":null,"dcterms":null}},{"name":"publicationPlace","value":"Vicksburg (Miss.)","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":null,"dcterms":null}},{"name":"publisher","value":"United States. Mississippi River Commision","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"publisher","dcterms":"publisher"}},{"name":"date","value":"1942","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"date","dcterms":"date"}},{"name":"date","value":"1939","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"date","dcterms":"date"}},{"name":"extent","value":"1 map on 4 sheets : color","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"format","dcterms":"extent"}},{"name":"dimensions","value":"sheets 100 x 149 cm","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"format","dcterms":"extent"}},{"name":"description","value":"Sheet numbers in lower right corner: Sheet no. 1. N3512-W8843/207x354 -- Sheet no. 2. N3305-W8846/207x348 -- Sheet no. 3. N3058-W8849/207x343 -- Sheet no. 4. 2851-W8851/207x338.","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"\"Areas shown outside the alluvial valley quadrangles of the Mississippi River Commission are compiled from quadrangles by U.S. Geological Survey in co-operation with State of Louisiana Board of State Engineers; official map of State of Louisiana by Board of State Engineers; map of intercoastal waterway by U.S. Engineer Office, Mobile, Alabama; preliminary county maps by Mississippi State Highway Department and parish maps by Louisiana Highway Commission.\"","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"\"Mississippi River (1919) mileages shown in black below Cairo, Ill.\" ; \"Mississippi River (1941) mileages shown in red above Head of Passes.\"","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"Also shows overflow, backwater, and headwater areas in 1937.","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"Shows existing project levees and project levees contemplated.","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"\"Reduced from recent detailed surveys of the Alluvial Valley by the Mississippi River Commission and supplemented by revision of the 1934 edition.\"","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"description","value":"Relief shown by contours and hachures; \"Elevations in feet above Mean Gulf Level.\"","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"description","dcterms":"description"}},{"name":"spatialCoverage","value":"Mississippi River Valley","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"coverage","dcterms":"spatial"}},{"name":"spatialCoverage","value":"Mississippi River","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"coverage","dcterms":"spatial"}},{"name":"language","value":"English","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"language","dcterms":"language"}},{"name":"subject","value":"Flood control","uri":null,"vocabulary":"Uncontrolled","mappings":{"dc":"subject","dcterms":"subject"}},{"name":"associatedPeople","value":"United States. 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