york.GISADMIN.Contour

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: York County Governemnt, York County, VA

Publication_Date: 2nd Quarter 2008

Title: york.GISADMIN.Contour

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: York Town, York County, Virginia

Online_Linkage:

Description:

Abstract:: These files contain contours at 2' interval for the York County, VA project area. The project encompasses approximately 51, 943 acres (~81 sq. miles) area of the York County, Va. The project area has been subdivided to North ( 27 sq. miles) and South (54 sq. miles). LiDAR data is acquired using ATLM 3100 sensor for these two regions and classified as First return and bare-earth data. The files are created in LAS format in Virginia State plane, South zone, NAD1983 coordinate system with US_Survey feet units.
The LiDAR used for the generation of Digital Elevation Model (DEM) and Digital Surface Model (DSM). The bare earth LiDAR data was supplemented with 3D breaklines to provide a solid and very accurate base to use during the contour generation at 2 foot interval.
Purpose:: LIDAR data was collected for the purposes of generation of 2 foot contours, DEM and DSM files as well as a variety of other purposes including planning, emergency management, economic development and field reference.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.

Range_of_Dates/Times:

Beginning_Date: February 2007
Ending_Date: March 2007

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.762807
East_Bounding_Coordinate: -76.385342
North_Bounding_Coordinate: 37.373280
South_Bounding_Coordinate: 37.090172

Keywords:

Theme:

Theme_Keyword_Thesaurus:: REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.
Theme_Keyword: LiDAR
Theme_Keyword: Digital Terrain Model (DTM)
Theme_Keyword: Digital Elevation Model (DEM)
Theme_Keyword: Digital Surface Model (DSM)
Theme_Keyword: Contour

Place:

Place_Keyword: York Town
Place_Keyword: York County
Place_Keyword: Virginia

Access_Constraints:

The data is property of York County, VA. Distribution of any of these data to anyone not licensed by the York County government is strictly prohibited.

Use_Constraints:

The data has been developed using procedures designed to produce data to National Standard for Spatial Data Accuracy (NSSDA) and is intended for use at 1 = 100 scale.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: County of York, Virginia
Contact_Person: Korine Leonard

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing address
Address: 224 Ballard Street
Address: P. O. Box 532
City: Yorktown
State_or_Province: Virginia
Postal_Code: 23690-0532
Country: United States of America

Contact_Voice_Telephone: (757) 890-3300

Contact_Electronic_Mail_Address: gis@yorkcounty.gov

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780

Data_Quality_Information:

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: Horizontal accuracy was tested by comparing the raw contours from each flightline against adjoining flightlines at specific points.
Quantitative_Horizontal_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

LIDAR points were tested for vertical accuracy by comparing their values to known control points and kinematic GPS survey. Ground GPS techniques were used to establish the control locations. Survey control points were used to validate the accuracy of the LIDAR surface model and effects of filtering algorithms for vegetation removal. Contour lines were generated and were verified for accuracy against surveyed spot elevations. Supplemental breaklines were added to more accurately model certain features. This essential validation proves the accuracy of the surface relative to the adjustment of the LIDAR data

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: +/- .25 feet
Vertical_Positional_Accuracy_Explanation:: The vertical positional accuracy of the data is verified by a control report that matches 2994 kinematic GPS collection and reconnaissance survey control points against filtered model key points collected by LIDAR.

Lineage:

Process_Step:

Process_Description:: LIDAR data is acquired using ATLM 3100 senson. The data is processed by utilizing a combination of automated filtering techniques and softcopy photogrammetry, data representing the earth's surface is derived. Supplemental breaklines are compiled in critical locations to ensure the final DTM and contours meet project accuracy specifications. Spot elevations were derived fromt the 2002 data. The spot elevations were adjusted and supplimented with the 2007 LiDAR data for positional and vertical accuracy using the softcopy photogrammetry techniques.

Process_Step:

Process_Description: Metadata imported.

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\YORK_CONTOURS\METADATA FILES\lidar_york.shp.xml

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\leonardk\LOCALS~1\Temp\xml1042.tmp

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 19880

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 13

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 1

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: MultiPatch
Point_and_Vector_Object_Count: 1

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 0

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

Lambert_Conformal_Conic:

Standard_Parallel: 36.766667
Standard_Parallel: 37.966667
Longitude_of_Central_Meridian: -78.500000
Latitude_of_Projection_Origin: 36.333333
False_Easting: 11482916.666667
False_Northing: 3280833.333333

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000833
Ordinate_Resolution: 0.000833

Planar_Distance_Units: survey feet

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_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.000010
Altitude_Distance_Units: feet
Altitude_Encoding_Method:: Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: york.GISADMIN.Contour

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: OBJECTID

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: LAYER

Attribute:

Attribute_Label: ELEVATION

Attribute:

Attribute_Label: TYPE

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.len

Detailed_Description:

Entity_Type:

Entity_Type_Label: Polyline

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: Color

Attribute:

Attribute_Label: Text

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Entity

Attribute:

Attribute_Label: Layer

Attribute:

Attribute_Label: Handle

Attribute:

Attribute_Label: Elevation

Attribute:

Attribute_Label: Linetype

Attribute:

Attribute_Label: Thickness

Detailed_Description:

Entity_Type:

Entity_Type_Label: Polygon

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: Color

Attribute:

Attribute_Label: Text

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Entity

Attribute:

Attribute_Label: Layer

Attribute:

Attribute_Label: Handle

Attribute:

Attribute_Label: Elevation

Attribute:

Attribute_Label: Linetype

Attribute:

Attribute_Label: Thickness

Detailed_Description:

Entity_Type:

Entity_Type_Label: MultiPatch

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: Color

Attribute:

Attribute_Label: Text

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Entity

Attribute:

Attribute_Label: Layer

Attribute:

Attribute_Label: Handle

Attribute:

Attribute_Label: Elevation

Attribute:

Attribute_Label: Linetype

Attribute:

Attribute_Label: Thickness

Detailed_Description:

Entity_Type:

Entity_Type_Label: Annotation

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: Text

Attribute:

Attribute_Label: Angle

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Entity

Attribute:

Attribute_Label: Handle

Attribute:

Attribute_Label: Elevation

Attribute:

Attribute_Label: Layer

Attribute:

Attribute_Label: Color

Attribute:

Attribute_Label: Style

Attribute:

Attribute_Label: FontId

Attribute:

Attribute_Label: Height

Attribute:

Attribute_Label: Thickness

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: York County, Virginia
Contact_Person: Korine Leonard

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing address
Address: 224 Ballard Street
Address: P. O. Box 532
City: Yorktown
State_or_Province: Virginia
Postal_Code: 23690-0532
Country: United States of America

Contact_Voice_Telephone: (757) 890-3300

Contact_Electronic_Mail_Address: leonardk@yorkcounty.gov

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: DWG
Format_Version_Number: 2000
Transfer_Size: 0.420

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: Not Available

Fees: Contact

Metadata_Reference_Information:

Metadata_Date: 20080606

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: County of York, Virginia
Contact_Person: Korine Leonard

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing address
Address: 224 Ballard Street
Address: P. O. Box 532
City: Yorktown
State_or_Province: Virginia
Postal_Code: 23690-0532
Country: United States of America

Contact_Voice_Telephone: (757) 890-3300

Contact_Electronic_Mail_Address: leonardk@yorkcounty.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Security_Information:

Metadata_Security_Classification_System: Not Available
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: Not Available

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Tue Sep 30 13:05:30 2008