MARIS is currently in the process of converting all of our metadata so that it will meet the FGDC standards. The data dictionary is currently in Adobe Acrobat format and will slowly be replaced with the new FGDC compliant metadata.
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This category represents the locational information required to define the geographic position of a place or feature. The Public Land Survey System (PLSS) data layer provides the basis for defining public and private property ownership, including parcel mapping and writing of legal descriptions in Mississippi. It is also used extensively for public administration applications by the state, counties, and local school systems. Referencing Systems are precisely defined ground control points or map boundaries that assist in the accurate location of ground features or the particular area defined by a map.

Economic Geography
The category represents information concerning human features of the landscape that are a result of, a by-product of, or are associated with economic activity in Mississippi. Economic information collected by the U.S. Bureau of the Census is included in Section G. The Industrial data layer provides themes that relate to the economic activities associated with the industrial sector, specifically those related to an environmental permitting requirement. * Wastewater discharge sites theme also includes facility types other than "industrial".

This category addresses the various boundaries used or defined by federal, state, and local units of government in Mississippi. The Administrative data layer contains themes that define the jurisdictional areas of local governments, selected public land boundaries, and other special purpose administrative districts. The Political data layer includes themes that define geographic area boundaries directly related to the process of choosing elected or appointed government representatives. Many 1990 Bureau of Census population characteristics are included with these boundaries.

This category represents the classification and use of surface and subsurface water in Mississippi. The Subsurface data layer refers specifically to groundwater resources noted in water well data sets. The Surface data layer pertains to natural and man-made drainage features existing on the surface of the land.

This category represents cultural features that support the basic activities of "modern" life. These features include the physical components of transportation, power supply, and communications networks. The Transportation data layer relates to the provision of systems for the mobility of people and goods. The Utilities data layer includes various services provided or regulated by government.

Physical Geography
This category emphasizes conditions reflecting the natural environment in Mississippi. The Bio-Geography data layer focuses on selected plant and animal communities. The Land Characterization data layer portrays selected characteristics about land use and/or land cover obtained from remote sensing data. The Physiography data layer includes data concerning the earth's structures and processes, with the exception of hydrologic information.

This category pertains to aspects of human society covering past and current conditions. The Census Data data layer delineates data collected by the U.S. Bureau of the Census during the 1990 Census.