DVRPC's 2005 Topographic Contours
Identification_Information:
Citation:
Citation_Information:
Originator:Delaware Valley Regional Planning Commission
Publication_Date:20061205
Title:
DVRPC's 2005 Topographic Contours
Publication_Information:
Publication_Place:Mt. Laurel, NJ
Publisher:BAE Systems
Description:
Abstract: 
Contour lines connect a series of points of equal elevation and are used to illustrate topography, or relief, on a map. They show the height of ground above Mean Sea Level (M.S.L.).  Numerous contour lines that are close together indicate hilly or mountainous terrain; when far apart, they represent a gentler slope.  This data set consists of breaklines, mass points, and contours at a five foot interval for the 5-county, Pennsylvania portion of DVRPC's region in ESRI Personal Geodatabase format (Pennsylvania State Plane coordinate system, NAD83).
Purpose: 
Aerial topographic survey of the 5-county, Pennsylvania portion of DVRPC's region.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20050404
Ending_Date:20050410
Currentness_Reference: 
ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-76.137
East_Bounding_Coordinate:-74.772
North_Bounding_Coordinate:40.677
South_Bounding_Coordinate:39.772
Keywords:
Theme:
Theme_Keyword_Thesaurus:None
Theme_Keyword:Contours
Theme_Keyword:Topographic Contours
Theme_Keyword:Elevation Contours
Theme_Keyword:Elevation
Theme_Keyword:Spot Elevations
Theme_Keyword:Control Points
Theme_Keyword:DTM/DEM
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:DVRPC Region
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:Pennsylvania
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:Bucks County
Place_Keyword:Chester County
Place_Keyword:Delaware County
Place_Keyword:Montgomery County
Place_Keyword:Philadelphia County
Access_Constraints:Must contact DVRPC.
Use_Constraints: 
The Delaware Valley Regional Planning Commission (DVRPC) excludes any and all implied warranties of merchantability and fitness.  No guarantees are expressed or implied as to the use or application of the digital information supplied.  DVRPC assumes no responsibility to maintain them in any manner or form.  DVRPC will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the material supplied, or arising out of any inaccuracy or defect in the digital information supplied.  Recipients of DVRPC digital files are not entitled to any file revisions, updates, corrections, or new releases.  Recipients of DVRPC digital files are expressly prohibited from copying or releasing these files to any other individuals or agencies, under any circumstances.  Recipients of DVRPC digital files are expressly prohibited from displaying for view or making these files available for download from the Internet or World Wide Web, under any circumstances.  Recipients of DVRPC digital files will credit DVRPC as the source of the data when producing maps, publications, reports, or other documents that utilize DVRPC files.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:Sandra Elfreth-Howery
Contact_Organization:BAE Systems ADR
Contact_Position:Project Manager
Contact_Address:
Address_Type:mailing and physical address
Address: 
124 Gaither Drive
Address: 
Suite 100
City:Mt. Laurel
State_or_Province:NJ
Postal_Code:08054
Country:USA
Contact_Voice_Telephone:856-793-4287
Contact_Facsimile_Telephone:856-866-7800
Contact_Electronic_Mail_Address:sandra.elfreth-howery@baesystems.com
Data_Set_Credit: 
BAE Systems
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: 
The accuracy of the ground control is confirmed by the evaluation of the results of the analytical bundle adjustment.  The residuals of the final adjustment ensured compliance with NSSDA standards.  The Pre Adjustment Gross Error Detection Statistical Test (Data Snooping, with a confidence level of 99.9%) has been applied to all observations included in the aerial triangulations. To detect small gross errors, during Adjustment Robust Estimators were used with the same confidence level and a power of the test of 1-beta=0.2. Systematic errors were eliminated through self calibration and through Additional Parameters. Their numerical stability, statistical significance, internal and external reliability were checked using Student-t test with the same confidence level and Variance/Co-variance analysis. Finally, the arrived variance factor was submitted to a Chi-square test against the pre-adjustment variance factor using a confidence level 99.9%.  Evaluation of the DEM includes checking the terrain data for spikes and wells, omissions, and other anomalies that do not meet the project accuracy requirements.  The horizontal and vertical accuracy has been tested by comparing the coordinates of well-defined points in the dataset with coordinates of the same points from an independent source of higher accuracy.
Logical_Consistency_Report: 
All files are inspected by the Production Manager to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position, all files conform to the project specifications.  The data has been checked for duplicate features, correct edge matching, overshoots, undershoots, offsets, overall cartographic appearance.
Completeness_Report: 
The data has been checked to ensure that the boundary and the content has been covered in its entirety.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: 
The horizontal accuracy standard follows the NSSDA-1998 standard.  The maximum permissible RMSE for 95% of the horizontal check points for the mapping product is 5 feet or better.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: 
The DEM data meets the required vertical accuracy necessary to ensure that the contours meet NMAS for 1"=200', 5' CI mapping.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:BAE Systems
Publication_Date:20000401
Title:
GPS Photo Control Survey
Type_of_Source_Media:CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:20000401
Source_Currentness_Reference:
ground condition
Source_Citation_Abbreviation:
GPS Ground Control
Source_Contribution: 
To be utilized in the analytical aerotriangulation process.  All horizontal and vertical control was prepared under the supervision of licensed Professional Land Surveyors.
Source_Information:
Source_Citation:
Citation_Information:
Originator:Earth Data International
Publication_Date:20050410
Title:
Digital Color Aerial Photography
Geospatial_Data_Presentation_Form:remote-sensing image
Source_Scale_Denominator:2400
Type_of_Source_Media:disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20050404
Ending_Date:20050410
Source_Currentness_Reference:
ground condition
Source_Citation_Abbreviation:
Aerial Photography
Source_Contribution: 
Color Aerial photography to be used in the creation of digital orthophotos.
Process_Step:
Process_Description: 
Horizontal and Vertical control points were acquired utilizing GPS collection techniques.  All control was prepared under the supervision of licensed Professional Land Surveyors.
Process_Date:20000401
Source_Produced_Citation_Abbreviation:
GPS Ground Control
Process_Step:
Process_Description: 
Color aerial imagery captured with the Leica ADS40 digital camera system and PAV30 gyro stabilized mount.  The photography was captured at a flying height of 9,500' utilizing GPS and IMU technology and conforms to ASPRS's Draft Aerial Photography Standards (1995).
Process_Date:20050416
Source_Produced_Citation_Abbreviation:
Aerial Photography
Process_Step:
Process_Description: 
The airborne GPS data were processed and integrated with the IMU. The results were imported into the ISTAR system for use in the aerotriangulation. The ADS40 imagery was downloaded onto the server and brought over to the UNIX based ISTAR system. The ground control was used in conjunction with the processed ABGPS results for the aerotriangulation. The properly formatted ISTAR results were used for subsequent processing.
Source_Used_Citation_Abbreviation:
GPS Ground Control
Source_Used_Citation_Abbreviation:
Aerial Photography
Process_Date:20050601
Source_Produced_Citation_Abbreviation:
Analytical Aerotriangulation
Process_Step:
Process_Description: 
The procedure utilized for the development of the DTM/DEM consisted of experienced photogrammetric technicians manually collecting masspoints and breaklines at a sufficient density that will ensure accurate generation of five foot contours as stated in the project specifications.  Existing "Contour Grade DEMs" were available from previous Chester County and City of Philadelphia projects.  These DEMs were reviewed and updated as necessary to reflect the terrain conditions of the new 2005 imagery to insure that the resulting contours meet NMAS for 1"=200', 5' CI mapping.
Source_Used_Citation_Abbreviation:
Aerial Photography
Source_Used_Citation_Abbreviation:
Analytical Aerotriangulation
Process_Date:20061105
Source_Produced_Citation_Abbreviation:
DEM
Process_Step:
Process_Description: 
Five foot contours were generated from the DEM using 3D Analyst in ArcMap.
Source_Used_Citation_Abbreviation:
Aerial Photography
Source_Used_Citation_Abbreviation:
Analytical Aerotriangulation
Source_Used_Citation_Abbreviation:
DEM
Process_Date:20061205
Source_Produced_Citation_Abbreviation:
Topography
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Vector
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name:Lambert Conformal Conic
Lambert_Conformal_Conic:
Lambert Conformal Conic
Standard_Parallel:39.933333
Standard_Parallel:40.966667
Longitude_of_Central_Meridian:-77.750000
Latitude_of_Projection_Origin:39.333333
False_Easting:1968500.000000
False_Northing:0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:row and column
Coordinate_Representation:
Abscissa_Resolution:1.000000
Ordinate_Resolution:1.000000
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:.01
Altitude_Distance_Units:feet
Altitude_Encoding_Method:Attribute values
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: 
All features were captured in conformance with accepted photogrammetric mapping procedures.  This data set contains the following features:  breakline, digital_elevation_model_point, control_point, obscured_area, elevation_contour_line, spot_elevation_point.
Entity_and_Attribute_Detail_Citation: 
Where applicable, all data conforms to the Proposal for 2005 Aerial Photography Project presented to the Delaware Valley Regional Planning Commission August 5, 2004.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Delaware Valley Regional Planning Commission
Contact_Person:Glenn McNichol
Contact_Position:Senior GIS Specialist
Contact_Address:
Address_Type:mailing and physical address
Address: 
190 N. Independence Mall West
Address: 
8th Floor
City:Philadelphia
State_or_Province:PA
Postal_Code:19106
Country:USA
Contact_Voice_Telephone:215-592-1800
Contact_Facsimile_Telephone:215-592-9125
Contact_Electronic_Mail_Address:gmcnichol@dvrpc.org
Distribution_Liability: 
Recipients of DVRPC digital files are expressly prohibited from copying or releasing these files to any other individuals or agencies, under any circumstances.  Recipients of DVRPC digital files are expressly prohibited from displaying for view or making these files available for  download from the Internet or World Wide Web, under any circumstances.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing address
Address: 
115 Land and Water building
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:pasda@psu.edu
Distribution_Liability: 
The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
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Metadata_Reference_Information:
Metadata_Date:20070807
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:BAE Systems
Contact_Person:William Kunkle
Contact_Position:Geospatial Lead Technician
Contact_Address:
Address_Type:mailing and physical address
Address: 
124 Gaither Drive
Address: 
Suite 100
City:Mt. Laurel
State_or_Province:NJ
Postal_Code:08054
Country:USA
Contact_Voice_Telephone:856-793-4277
Contact_Facsimile_Telephone:856-866-7800
Contact_Electronic_Mail_Address:william.kunkle@baesystems.com
Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
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