SURFACE-WATER DATA AND MAPS OF MISSISSIPPI THIS SITE IS CURRENTLY UNDER DEVELOPMENT

MISSISSIPPI MAPS Generic Map of Mississippi Displays a basic map of Mississippi. Additional map layers can be chosen by the user to create customized maps.

About this web site The USGS investigates the occurrence, quantity, quality, distribution, and movement of surface and underground waters and disseminates the data to the public, State and local governments, public and private utilities, and other Federal agencies involved with managing our water Resources.

Data presented in this web site was developed by the U.S. Geological Survey, the Mississippi Water Science Center of the U.S. Geological Survey located in Jackson, Mississippi, and the Mississippi Automated Resource Information System (MARIS).

The data presented are shown using the Mississippi Transverse Mercator (MSTM) projection. The MSTM projection alleviates the multiple-zone conflict inherent in UTM and State Plane systems. The problem with both of these systems is that each divides the state into an east and west zone that cannot be digitally displayed together. The MSTM projection is a customized Transverse Mercator projection designed to more evenly distribute convergence and scale-factor, and is based on the North American Datum of 1983 (NAD83). Visit MARIS to learn more about MSTM.

For the hurricane inundated areas, the areas shown include everything inland of the coastline and U.S. 90 crossings and within Mississippi, except the inclusion of the inundation in Louisiana inland of the U.S. 90 crossings of the Pearl River.

Summer 2004 aerial photos of each county in Mississippi have been provided by the U.S. Department of Agriculture - Farm Services Agency - Aerial Photography Field Office. The National Agriculture Imagery Program (NAIP) is designed to acquire natural color digital ortho imagery during the agricultural growing seasons in the continental U.S. This NAIP produces 1 meter ground sample distance ortho imagery rectified to a horizontal accuracy of within +/- 3 meters of reference digital ortho quarter quads from the National Digital Ortho Program. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300 meter buffer on all four sides. NAIP quarter quads are formatted to the UTM coordinate system using NAD83 Zones 15 (west) and 16 (east). NAIP imagery may contain as much as 10% cloud cover per tile. Each county file was generated by compressing NAIP quarter quadrangle tiles that cover a county. MrSID compression, with mosaic option, was used. Target values for the compression ratio are 50:1 and a compression level of 9. These interim county photos may contain defects and have horizontal accuracy less than the specified tolerances. Defective imagery may be replaced within one year of image acquisition date. For further information concerning the NAIP and other products from the USDA-APFO, visit http://www.apfo.usda.gov/.

Not all water-resources data collected by the USGS are provided on this web page. To inquire about the availability of additional hydrologic data, as well as other USGS information such as reports, visit the USGS Water Resources Home Page at http://water.usgs.gov.

Disclaimer: The information contained in this website is derived from a variety of public and private sector sources considered to be dependable, but the accuracy, completeness, and currency thereof are not guaranteed. The USGS makes no warranties, expressed or implied as to the accuracy, completeness, currency, reliability, or suitability for any particular purpose of information or data contained in or generated from this website. Additionally, the USGS or any employee thereof assumes no liability associated with the use of this website.

Prepared in cooperation with the Mississippi Department of Transportation

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