Geographic Information System Documents

All of the data files and Geographic Information System coverages that were used to analyze the data and generate the maps for the Assessment Report are provided on this Compact Disc.  Three different methods are available for accessing this information:

    ArcExplorer:

For Users without GIS experience and without ESRI's ArcView software, ESRI's free ArcExplorer application is provided along with its' Users Manual in Adobe Acrobat format.  Click on the icon to install the application, click on the icon to open the ArcExplorer Manual.  Once ArcExplorer is installed the maps can be opened by clicking on the or by browsing to the files from within ArcExplorer.

       Install ESRI's ArcExplorer 

       Install Adobe Acrobat Reader

       View ArcExplorer 2.0 Manual (PDF File)

       Projects:

                        Map 1.2-1 Chesapeake Basin Watersheds

                        Map 2.1-1 Surficial Geology

                        Map 2.1-2 Subsurface Geology

                        Map 2.1-3 Geologic Cross Section (Not Available in ArcExplorer)

                        Map 2.1-4 Hydrogeomorphic Regions

                        Map 2.1-5 Ground-Water Recharge Potential

                        Map 2.1-6 Hydric Soils

                        Map 2.1-7 Soil Erodibility

                        Map 2.1-8 Soil Types

                        Map 2.1-9 Septic System Suitability

                        Map 2.2-1 1984 Land Use

                        Map 2.2-2 1992 Land Use

                        Map 2.2-3 1997 Land Use

                        Map 2.2-4 Agricultural Preservation Districts

                        Map 2.2-5 State Investment Areas

                        Map 2.3-1 Known and Potential Nutrient Sources

                        Map 2.3-2 Known and Potential Chemical Sources

                        Map 2.3-3 Known and Potential Chemical Sources - City Details

                        Map 2.4-1 Air Sources

                        Map 2.5-1 Surface-Water Monitoring Locations

                        Map 2.5-2 Total Phosphorus Concentrations and Trends

                        Map 2.5-3 Total Nitrogen Concentrations and Trends

                        Map 2.5-4 Dissolved Oxygen Concentrations and Trends

                        Map 2.5-5 Water Table Elevation

                        Map 2.5-6 Water Resource Protection Areas

                        Map 2.5-7 Ground-Water Monitoring Locations

                        Map 2.5-8 Nitrate Concentrations in Selected Wells

                        Map 2.5-9 Domestic Well Densities

                        Map 2.5-10 Chloride Concentrations in Selected Wells

                        Map 2.5-11 Iron Concentrations in Selected Wells

                        Map 2.5-12 Public Water-Supply Well Locations

                        Map 2.5-13 Industrial Well Densities

                        Map 2.5-14 Irrigation Well Densities

                        Map 2.5-15 Combined Well Densities

                        Map 2.5-16 Maximum Daily Ground-Water Use

                        Map 2.6-1 Wetland Locations

                        Map 2.6-2 Drainage Ditch Areas

                        Map 2.7-1 Living Resources

                        Map 2.8-1 Growth Patterns

                        Map 2.8-2 Recreation Sites

    ArcView 3.2:

For Users with ArcView GIS experience and/or software, a complete ArcView project containing all of the Views and Layouts is also provided.  This file must be accessed by browsing to it from within ArcView.  Trying to open the project by double-clicking on the chesapeake.apr file will start ArcView, but will not be able to find the project.  All of the shapefiles used in the maps are included in subject-specific subdirectories. 

        Open Project Directory

        Open Shapefile Directory

For more experienced ArcView GIS users, the View and Layout Documents needed for each of the maps are provided as individual ArcView Object Data Base (ODB) files.  To simplify the use of these files, a custom ArcView extension (ODB_Docs.avx) is also included that enables the import, export and cloning of these ODB files in any ArcView Project.  For ease of use, an empty project (ODB.apr) is included that  has this extension already loaded with a read me file explaining how to use the tools.  For users that want to use this extension in other ArcView Projects, the ODB_Docs.avx file must be copied into their ArcView Extensions directory (default location for ArcView 3.0 is ESRI\AV_GIS30\ARCVIEW\EXT32).

        Open Project Directory

        Open ODB File Directory

    ArcGIS 8.1:

        Open Project Directory

                        Map 1.2-1 Chesapeake Basin Watersheds

                        Map 2.1-1 Surficial Geology

                        Map 2.1-2 Subsurface Geology

                        Map 2.1-3 Geologic Cross Section

                        Map 2.1-4 Hydrogeomorphic Regions

                        Map 2.1-5 Ground-Water Recharge Potential

                        Map 2.1-6 Hydric Soils

                        Map 2.1-7 Soil Erodibility

                        Map 2.1-8 Soil Types

                        Map 2.1-9 Septic System Suitability

                        Map 2.2-1 1984 Land Use

                        Map 2.2-2 1992 Land Use

                        Map 2.2-3 1997 Land Use

                        Map 2.2-4 Agricultural Preservation Districts

                        Map 2.2-5 State Investment Areas

                        Map 2.3-1 Known and Potential Nutrient Sources

                        Map 2.3-2 Known and Potential Chemical Sources

                        Map 2.3-3 Known and Potential Chemical Sources - City Details

                        Map 2.4-1 Air Sources

                        Map 2.5-1 Surface-Water Monitoring Locations

                        Map 2.5-2 Total Phosphorus Concentrations and Trends

                        Map 2.5-3 Total Nitrogen Concentrations and Trends

                        Map 2.5-4 Dissolved Oxygen Concentrations and Trends

                        Map 2.5-5 Water Table Elevation

                        Map 2.5-6 Water Resource Protection Areas

                        Map 2.5-7 Ground-Water Monitoring Locations

                        Map 2.5-8 Nitrate Concentrations in Selected Wells

                        Map 2.5-9 Domestic Well Densities

                        Map 2.5-10 Chloride Concentrations in Selected Wells

                        Map 2.5-11 Iron Concentrations in Selected Wells

                        Map 2.5-12 Public Water-Supply Well Locations

                        Map 2.5-13 Industrial Well Densities

                        Map 2.5-14 Irrigation Well Densities

                        Map 2.5-15 Combined Well Densities

                        Map 2.5-16 Maximum Daily Ground-Water Use

                        Map 2.6-1 Wetland Locations

                        Map 2.6-2 Drainage Ditch Areas

                        Map 2.7-1 Living Resources

                        Map 2.8-1 Growth Patterns

                        Map 2.8-2 Recreation Sites

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