Coastal & Estuarine Geology: Coastal Plane Vector Maps

PLEASE NOTE: These images and data are for illustration purposes only. Do not use these documents for navigation, legal purposes, or anything really important. They were created only to illustrate our publications and are not accurate enough to be used for any other purposes.
      These maps are in vector format. Unlike raster images, they can be rescaled without distortion. They were created in AutoCAD Map 2000 and consist of polyline segments.
      To use a DXF file you need software that reads DXF files. Some commonly used DXF-capable titles are: AutoCAD, ArcInfo, CorelDraw, Paint Shop Pro, Bryce 3D, 3D Studio, and many Intergraph programs.
      Click on an image to download the DXF file. You will not be able to view the files on-line. The files have been Zipped to decrease download times.

      This is a vector format map. Unlike raster images, it can be rescaled without distortion. The map were created in ArcGIS 8.3 and consists of polyline segments. Two file formats are available: Autodesk's Drawing Exchange Format (.DXF), and ESRI's Shapefile (.SHP). These are widely accepted vector data standards and are used by programs such as AutoCAD, ArcGIS, ArcInfo, CorelDraw, Adobe Illustrator, JASC's Paint Shop Pro, Bryce 3D, 3D Studio Max, and many Intergraph programs.
     A metadata file accompanies each file. The metadata describe map projections, compilation procedures and all other critical parameters necessary to the proper use of the data. A summary of the metadata is presented at the end of the table below.
      To download data click on the desired file format in the table below. Files have been compressed with Winzip to decrease download times. You will not be able to view the files on-line.
     If you need high-resolution shoreline maps of tidewater Maryland counties see the Shoreline Vector Map page.

Maryland County Boundaries	Click to download these formats (file size, kilobytes)
	dxf (587)	shp (784)

Metadata Summary

Description: These data are produced by the State Highway Administration's Highway Mapping Team for their GRID Map base. They originally were digitized from the USGS 7.5' quadrangle maps and have been enhanced through property records research. This database does not contain the new boundary near Takoma Park between Prince George's and Montgomery counties. The data are created to be map accurate at a scale of 1:24,000. These data were created on a CAD (Computer Aided Design) type of system. They were merged into county files and converted to a GIS format by Towson State University under contract to the Maryland Office of Planning

Layer Name: SHA Political County Boundaries
Name Description: County boundaries as mapped by the Maryland State Highway Administration
Date: 1995
Scale: 1:24,000 (1" = 2,000 feet)
Scale Tolerance: 40 feet on the ground.
Custodian: State Highway Administration, Department of Natural Resources / Chesapeake & Coastal Watershed Service
Contact: rsdavis@sha.state.md.us or kenmiller@dnr.state.md.us
Data Type: Vector
Datum: Maryland State Plane Coordinate System, NAD 83, meters
Metadata Date: November 11, 1999

updated 5/9/08

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Atlantic Coast Maps	Chesapeake Bay
Atlantic Coast, coastal bays and streams, DXF format (AutoCAD r12), (215 kb, ZIPPED)	Chesapeake Bay Shorelines, Maryland only, DXF format (AutoCAD r12), (274 kb, ZIPPED)
High-Resolution Shoreline Maps We have available for download a series of high-resolution vector maps of tidewater Maryland. These data sets include shoreline attributes such as vegetated, protected, beach, etc. Please see the Shoreline Vector Map page for more information.
County Outlines (Projection: NAD 1927 Maryland State Plane, FIPS 1900) Click on a county in the map or on a name in the list below to download a zipped DXF file
	Allegany Anne Arundel Baltimore Calvert Caroline Carroll Cecil Charles Dorchester Frederick Garrett Harford	Howard Kent Montgomery Prince Georges Queen Annes St. Marys Somerset Talbot Washington Washington, D.C. Wicomico Worcester


*Vector Maps*	contact: Bob Conkwright (bconkwright@mgs.md.gov)