COVERAGE DOCUMENTATION

DOCUMENTATION REVISION: 5/23/2012

FILE NAME: um####.dgn (where #### is the four digit city code number) 

DESCRIPTIVE NAME: Highway and Street Maps ( City Maps )

STATUS: Complete

DESCRIPTION: This coverage is of the 947 incorporated cities. These files contain the
information that produce the Highway and Street Map series. The files contain these
features: streets, railroads, hydrology, airports, bridges, boundarys, cities, tier-range-section, etc.   

GEOGRAPHIC EXTENT: Iowa

COVERAGE TYPE: Points. Vectors, 

COVERAGE SIZE: 
     File Size: 32,000 bytes to 1.48 MB

MAP PROJECTION: Lambert Conformal Conic
     Longitude of Origin: -93:30:00.0000 d:m:s
     Latitude of Origin:     41:00:00.0000
     Standard Parallel 1:   33:00:00
     Standard Parallel 2:   45:00:00

MAP UNITS: Miles  

DATUM: User-defined

ELLIPSOID: Clark 1866

SOFTWARE/VERSION: Bentley/MicroStation J

COVERAGE CREATED: 1987

COVERAGE DEVELOPER: Office of Transportation Data, Planning, Programming and Modal         
                    Division, Iowa Department of Transportation

DOT CONTACT: Mark Hansen, Iowa Department of Transportation, Office of            
             Transportation Data, 800 Lincoln Way, Ames, IA 50010
             515-239-1990
             mark.hansen@iowadot.us

ORIGINAL SOURCE INFORMATION:
     Media: Manual drafted city maps on film base at 1" = 1056 feet.
     Title: Varies
     Author/Agency: Iowa Departmet of Transportation
     Published Date: Varies
     Compiled Date: Varies
     Scale: 1:12672      
     Projection: none          
     Geographic Control: Road intersections                                    
     Data Conversion: Files converted using Projection Manager Software
     References:

ACCURACY ASSESSMENT: No assessment has been made.

ASSOCIATED COVERAGES: Each city in the state has a similar coverage and is 
                      geographically located.

ASSOCIATED FILES: There are files of all the counties in the state.   

COMMENTS: None

****NOTICE****
This digital, graphically reference data was developed by the Iowa Department of
Transportation to carry out the agency goal to provide and preserve adequate, safe, and 
efficient transportation services based on the use by and benefits to the public. The data
resides in the Transportation Data web server directories. Although efforts have been
made to make it useful to the Department, the Department assumes no responsibility for
the consequences of inappropriate uses or interpretations of the data made by anyone
to whom this data has been made available. The Department bears no responsibility to
inform users of any changes made to this data. Anyone using this data is advised that
precision implied by the coverage may far exceed actual precision. Comments on this
data are invited and the Department would appreciate that documented errors be
brought to staff attention.