DVRPC 2000 Digital Orthoimagery
Identification_Information:
Citation:
Citation_Information:
Originator:Delaware Valley Regional Planning Commission
Publication_Date:2000
Title:
DVRPC 2000 Digital Orthoimagery
Publication_Information:
Publication_Place:Mt. Laurel, NJ
Publisher:BAE Systems
Online_Linkage: http://www.dvrpc.org/
Online_Linkage: http://www.pasda.psu.edu/
Description:
Abstract: 
DVRPC Tiles - An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map.
Purpose: 
Aerial survey of the 5-county, Pennsylvania portion DVRPC's region. Orthophotos serve a variety of purposes, from interim maps to field references for earth science investigations and analysis. Digital orthophotos are useful as a layer within a geographic information system (GIS) and as a tool for the creation or revision of other GIS data layers.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:2000
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:ISO 19115 Topic Categories
Theme_Keyword:orthoimagery
Theme_Keyword:orthophotography
Theme_Keyword:aerial photography
Theme_Keyword:orthophotograph
Theme_Keyword:aerial photograph
Theme_Keyword:orthoimage
Theme_Keyword:orthophoto
Theme_Keyword:aerial photo
Theme_Keyword:digital orthoimagery
Theme_Keyword:digital orthophoto
Theme_Keyword:digital aerial photo
Theme_Keyword:rectified photograph
Theme_Keyword:rectified image
Theme_Keyword:imagery
Theme_Keyword:ortho
Theme_Keyword:aerial
Theme_Keyword:DTM/DEM
Theme_Keyword:imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Category
Theme_Keyword:imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:DVRPC Region
Place_Keyword:Bucks County
Place_Keyword:Chester County
Place_Keyword:Delaware County
Place_Keyword:Montgomery County
Place_Keyword:Philadelphia County
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:Glenn McNichol
Contact_Organization:Delaware Valley Regional Planning Commission
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:Pennsylvania
Postal_Code:19106
Country:United States
Contact_Voice_Telephone:215-592-1800
Contact_Facsimile_Telephone:215-592-9125
Contact_Electronic_Mail_Address:gmcnichol@dvrpc.org
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.  The program ORTHOQC is able to match the original image pixels of pass/tie points, ground control points, and check points with the final ortho, extract the corresponding horizontal coordinates from the digital ortho and compare them with the original measured points in the field or adjusted from the aerotriangulation.  Values of statistics such as RMSE, Max and Min Discrepancies, standard deviation, etc. are then derived and analyzed statistically.
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 when loaded using the ASCII file header, all files conform to the project specifications for pixel resolution, file standard, dimensions, and compression, and all files do not contain blemishes such as visible seam lines, tone differences, data dropout or artifacts; scan swathing, or warped bridges and overpasses.
Completeness_Report: 
All imagery is visually inspected for completeness to ensure that no gaps or image misplacement exists in the image area.  Imagery is mosaicked to ensure complete coverage for map sheets.  The imagery 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 horizontal accuracies of the orthophotos are met.
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.
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Raster
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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
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: 
A digital number from 0 to 4095 will be assigned to each pixel.  For the color imagery this number refers to a color look-up table which will contain the red, green, and blue (RGB) values, each from 0 to 255, for that digital number.
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:2000
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing and physical 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
Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
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