Intersection Point

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: DC GIS
Publication_Date: 20110517
Title:
Intersection Point
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publisher: DC GIS
Online_Linkage: Server=10.1.11.144; Service=5151; User=dcgis; Version=SDE.DEFAULT
Larger_Work_Citation:
Citation_Information:
Originator: DC GIS
Title:
DC Geographic Information System
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Intersection Point locations. The dataset contains locations and attributes of Intersections, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies.

The Intersection Points - MAR is primarly derived from DC Department of Transportation's (DDOT) Intersection Table in their Street Spatial Database (SSD). Regular at grade intersections (TYPE = 'REGULAR') as well as overpasses (TYPE = 'OVERPASS'), underpasses (TYPE = 'UNDERPASS') and ramps (TYPE = 'RAMP') are included.  The overpasses, underpasses and ramps are based on street centerlines from DDOT. 

All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.

METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.
Purpose:
This data is used for the planning and management of Washington, D.C. by local government agencies.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20110517
Currentness_Reference:
publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.114395
East_Bounding_Coordinate: -76.909401
North_Bounding_Coordinate: 38.995255
South_Bounding_Coordinate: 38.809864
Data_Set_G-Polygon:
Data_Set_G-Polygon_Outer_G-Ring:
G-Ring_Point:
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: location
Theme_Keyword: Intersection
Theme_Keyword: Ramps
Theme_Keyword: Overpass
Theme_Keyword: Underpass
Place:
Place_Keyword: Washington, D.C.
Place_Keyword: District of Columbia
Place_Keyword: DC
Place_Keyword: DC GIS
Place_Keyword: DCGIS
Use_Constraints:
Acknowledgment of the DC Geographic Information Systems Program (DC GIS).  The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a  particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address:
441 4th St NW, Suite 930 South
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5 pm
Data_Set_Credit:
DDOT
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. Validated by source and/or responsible agency.
Logical_Consistency_Report:
In process of validation by source and/or responsible agency.
Completeness_Report:
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. Validated by source and/or responsible agency.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
In process of validation by source and/or responsible agency.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
N/A
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: United States Postal Service
Publication_Date: 2002
Title:
USPS website
Other_Citation_Details:
site visited august 2002.
Online_Linkage: http://www.usps.com/
Type_of_Source_Media: Digital
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference:
publication date
Source_Citation_Abbreviation:
DDOT Street Spatial Database
Source_Contribution:
locations and attributes
Process_Step:
Process_Description:
Data Collection:

Most of the data is collected from DDOT's (DC Department of Transportation) Street Spatial Database (SSD).   There is a table called intersection.
Process_Date: 20091113
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5 pm
Process_Step:
Process_Description:
Data QA/QC

After data preparation, the data team performs qa/qc.   Various processes check the following parameters: 1.) spatial and attribute accuracy; 2.) data usability; 3.) data dictionary adherence; 4.) specialized metrics, such as connectivity and directionality; and 5.) data load success.  These checks are, as follows:

Visual - staff perform a structured visual check of the data, using on-screen, plotting, and customized routines, and, at times, comparing it to the source documents.

Edge-matching - For grided datasets, staff review the spatial capture, connectivity, and attribution of data across tile boundaries, where applicable.

Automated - Staff compare the data to documented standards and source files through automated procedures and reports.

Specialized - Staff review more specific data parameters, such as directionality, connectivity, and topology.

Edit Verification - Staff ensure that previous errors are fixed to specifications.

Field Verification - Occasionally, through field work, team members compare the GIS data with the real world.

Data Loading - Staff evaluate the success and evaluate the process of loading raw data into a structured database.

Since most of the data use addresses as the spatial reference, staff compare the data against base layers (buildings, roads, street centerlines, owner-points, parks, and orthophotography) and move features where needed.

In some cases, OCTO GIS personnel produce maps and reports for source agency review. Through an iterative process, staff modify and enhance the layer to agency specifications.  For some datasets, the agency endorses the final product for data load and publication.
Process_Date: 20110517
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5 pm
Process_Step:
Process_Description:
Dataset copied.
Source_Used_Citation_Abbreviation:
C:\DATA\GIS_DATA\ACTIVE\MARDATA\INTERSECTIONS\IntersectionPt
Process_Date: 20110517
Process_Time: 16351700
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
C:\temp\IntersectionPt.xml
Process_Date: 20110517
Process_Time: 16524600
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Spatial_Data_Organization_Information:
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: 18276
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 1900
Lambert_Conformal_Conic:
Standard_Parallel: 38.300000
Standard_Parallel: 39.450000
Longitude_of_Central_Meridian: -77.000000
Latitude_of_Projection_Origin: 37.666667
False_Easting: 400000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000100
Ordinate_Resolution: 0.000100
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 1.000000
Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: DCGIS.IntersectionPt
Attribute:
Attribute_Label: REFX
Attribute_Definition:
Reference X
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: REFY
Attribute_Definition:
Reference Y
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: NODEID
Attribute_Definition:
Node Identifier
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: INTERSECTIONID
Attribute_Definition:
Intersection identifier
Attribute:
Attribute_Label: SOURCE
Attribute_Definition:
Source
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition:
Latitude value
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition:
Longitude value
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Attribute:
Attribute_Label: SHAPE
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: FULLSTREET1DISPLAY
Attribute_Definition:
Full intersection description
Attribute:
Attribute_Label: MARID
Attribute_Definition:
Master Address Repository Unique Identifier
Attribute:
Attribute_Label: STREET1ID
Attribute_Definition:
Street 1 Identifier
Attribute:
Attribute_Label: STREET2ID
Attribute_Definition:
Street 2 Identifier
Attribute:
Attribute_Label: FULLSTREET2DISPLAY
Attribute_Definition:
Full intersection description 2
Attribute:
Attribute_Label: FULLINTERSECTION
Attribute_Definition:
Full intersection name
Attribute:
Attribute_Label: ST1NAME
Attribute_Definition:
Street Name 1
Attribute:
Attribute_Label: ST1TYPE
Attribute_Definition:
Street 1 Type
Attribute:
Attribute_Label: NATIONALGRID
Attribute_Definition:
National grid coordinates
Attribute:
Attribute_Label: STREET1SEGID
Attribute_Definition:
Street 1 Segment Identifier
Attribute:
Attribute_Label: STREET2SEGID
Attribute_Definition:
Street 2 Segment Identifier
Attribute:
Attribute_Label: ST1QUAD
Attribute_Definition:
Street 1 Quadrant
Attribute:
Attribute_Label: INTERSECTION_TYPE
Attribute_Definition:
Intersection type
Attribute:
Attribute_Label: ST2NAME
Attribute_Definition:
Street 2 Name
Attribute:
Attribute_Label: ST2TYPE
Attribute_Definition:
Street 2 Type
Attribute:
Attribute_Label: ST2QUAD
Attribute_Definition:
Street 2 Quadrant
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address:
441 4th St NW, Suite 930 South
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5 pm
Resource_Description: Downloadable Data
Distribution_Liability:
Acknowledgment of the DC Geographic Information Systems Program (DC GIS).  The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a  particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.488
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Ordering_Instructions:
Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page.  Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.
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Metadata_Reference_Information:
Metadata_Date: 20110517
Metadata_Review_Date: 20040107
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address:
441 4th St NW, Suite 930 South
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5 pm
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
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