brdgs

Citation:

Citation Information:

Originator: Maine Department of Transportation, Bureau of Planning
Publication Date: 9/8/07
Title: brdgs
Geospatial Data Presentation Form: vector digital data
Publication Information:

Publication Place: Augusta ME
Publisher: Maine Office of Geographic Information Systems (MEGIS)

Description:

Abstract: Represents locations of bridges along Maine's public roads. Users should always note the publicaton date.
Purpose: Developed for planning purposes. For use within the Maine DOT

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1997
Beginning Time: Unknown
Ending Date: 9/8/2007
Ending Time: Unknown

Currentness Reference: publication date

Status:

Progress: In work
Maintenance and Update Frequency: Weekly

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -71.135503
East Bounding Coordinate: -66.88721
North Bounding Coordinate: 47.361972
South Bounding Coordinate: 43.07582

Keywords:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Road
Theme Keyword: Highway
Theme Keyword: Route
Theme Keyword: Bridge
Theme Keyword: Structure
Theme Keyword: Span
Theme Keyword: Centerline
Theme Keyword: Bridge Number
Theme Keyword: INFRASTRUCTURE
Theme Keyword: 24000
Theme Keyword: Transportation

Place:

Place Keyword Thesaurus: None
Place Keyword: Maine
Place Keyword: USA
Place Keyword: United States of America

Stratum:

Stratum Keyword Thesaurus: None
Stratum Keyword: Human Dimensions

Access Constraints: This data should not be redistributed without permission. Any secondary distribution must have this documentation appended.
Use Constraints:
Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, current ness and other available information. Please confirm that you are using the most recent copy of both data and metadata from the Maine Department of Transportation (MEDOT).
Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Transportation, Bureau of Planning

Contact Address:

Address Type: mailing address
Address: 16 SHS
City: Augusta
State or Province: Maine
Postal Code: 04333
Country: United States

Contact Voice Telephone: (207) 624-3300
Contact Facsimile Telephone: (207) 624-3301
Hours of Service: 8-5 Monday-Friday
Contact Instructions: Ask for GIS Coordinator

Native Data Set Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324

Logical Consistency Report: ESRI feature type: Simple, Geometry: Point, Topology
Completeness Report: Most public bridges are mapped.
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report: Data accuracy 40ft + -

Lineage:

Process Step:

Process Description: Created weekly during 'TIDE load' (TIDE is MEDOT's data warehouse). During the 'TIDE load', certain data is extracted from MEDOT's GIS-enabled roads basemap and made available in a shapefile format.
Process Date: Publication Date

Process Step:

Process Description: Dataset copied.

Process Step:

Process Description: Metadata imported.

Process Step:

Process Description: Dataset copied.

Process Step:

Process Description: Metadata imported.

Process Step:

Process Description: Metadata imported.

Process Step:

Process Description: Dataset copied.

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: Entity point
Point and Vector Object Count: 4153

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: Universal Transverse Mercator 1983
Universal Transverse Mercator:

UTM Zone Number: 19
Transverse Mercator:

Scale Factor at Central Meridian: 0.9996
Longitude of Central Meridian: -69
Latitude of Projection Origin: 0
False Easting: 500000
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 0
Ordinate Resolution: 0

Planar Distance Units: meters

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257

Detailed Description:

Entity Type:

Entity Type Label: bridge

Attribute:

Attribute Label: BRDGNO
Attribute Definition: Unique, four-digit string of numbers assigned to every public bridge in Maine
Attribute Definition Source: MEDOT

Attribute:

Attribute Label: BRDG_NAME
Attribute Definition: Common name associated with bridge.
Attribute Definition Source: MEDOT

Attribute:

Attribute Label: FID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: Coordinates defining the features.

Overview Description:

Entity and Attribute Overview: BRDGS contains the attribute BRDGNO, assigned by MEDOT to public bridges in Maine.
Entity and Attribute Detail Citation:
The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Resource Description: Downloadable Data
Distribution Liability:
Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ESRI Shapefile
Format Version Number: ARC Version 9.x
Format Specification: ArcView Shapefile Format
Format Information Content:
MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.
File Decompression Technique:
Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/.
Digital Transfer Option:

Online Option:

Access Instructions:
These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog. Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/. If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI). See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
Digital Transfer Option:

Online Option:

Access Instructions: Where file size and Internet access permit, data requests can be made available via File Transfer Protocol (FTP).

Fees: Data may be downloaded from Maine GIS Internet Data Catalog at no charge.
Turnaround: Data is available for immediate download from the Maine GIS Internet Data Catalog.

Standard Order Process:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Distribution Liability: Users must assume responsibility to determine the usability of this data for their purposes.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ARCSDE
Format Version Number: ArcSDE 9.x
Format Information Content: Oracle 9i

Digital Transfer Option:

Online Option:

Access Instructions: Please contact the Maine Office of GIS (MEGIS) for access instructions.

Fees: Access is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login.

Metadata Date: 9/13/2007
Metadata Review Date: 9/25/2007
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: Nate Kane
Contact Organization: Maine Department of Transportation

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: SHS 16
City: Augusta
State or Province: Maine
Postal Code: 04333
Country: United States

Contact Voice Telephone: (207) 624-3297

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Extensions:

Online Linkage: http://www.esri.com/metadata/esriprof80.html
Profile Name: ESRI Metadata Profile