Philadelphia aerial photography 2019


Identification_Information:
Citation:
Citation_Information:
Originator:City of Philadelphia
Publication_Date:2019
Title:
Philadelphia aerial photography 2019
Geospatial_Data_Presentation_Form:remote-sensing image
Publication_Information:
Publication_Place:Philadelphia , PA
Other_Citation_Details:
April 1, 2019 through May 4, 2019
Online_Linkage: http://www.pasda.psu.edu/
Description:
Abstract:
Color Citywide digital orthophotography with a ground resolution of at various resolutions, georeferenced to the Pennsylvania State Plane Coordinate System, and delivered as individual and mosaicked raster images. The dataset consists of tiled orthogonal imagery produced from nadir images captured by various contractors during the months of April and May.
Purpose:
educational
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:2019
Currentness_Reference:
publication date
Status:
Progress:Complete
Maintenance_and_Update_Frequency:As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.284081
East_Bounding_Coordinate: -74.954057
North_Bounding_Coordinate: 40.143701
South_Bounding_Coordinate: 39.861859
Keywords:
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:orthos
Theme_Keyword:imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Place:
Place_Keyword_Thesaurus:City of Philadelphia
Place_Keyword:Philadelphia
Access_Constraints:The City of Philadelphia reserves all rights in the City's databases and any data contained therein, and the end user’s use of the data does not constitute a transfer of, nor does the end user receive, any title or interest in the database or any other City data. The City of Philadelphia makes no representation about the accuracy of any specific information in this data and is provided “as is” and without Warranty of any kind. The user of this data will assume complete responsibility for any and all occurrences resulting from its use or display and will hold the City of Philadelphia harmless from any and all claims, demands, liabilities, obligations, damages, suits, judgments or settlements, including reasonable costs and attorneys' fees, that arise from use of this data.
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Philadelphia Office of Innovation and Technology
Contact_Position:GIS Manager
Contact_Address:
Address_Type:mailing and physical address
Address:
1234 Market Street
City:Philadelphia
State_or_Province:PA
Postal_Code:19107
Country:USA
Contact_Voice_Telephone:215-686-8101
Contact_Electronic_Mail_Address:maps@phila.gov
Hours_of_Service:8:30 AM - 4:30 PM
Data_Set_Credit:
PCPC - Graphics/GIS Division
Security_Information:
Security_Classification_System:No security considerations
Security_Classification:Unclassified
Security_Handling_Description:N/A
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Cross_Reference:
Citation_Information:
Originator:City of Philadelphia
Online_Linkage: www.pasda.psu.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
None completed.
Logical_Consistency_Report:
The dataset consists of tiled orthogonal imagery produced from nadir images captured by Pictometry International. Automatic aerial triangulation (AAT) was performed. The triangulated frames were rectified to a LiDAR derived DEM. Mosaicing was performed using an automatic seaming algorithm and manually edited to eliminate seams through elevated features where possible

Acquisition:
Flight plans were prepared to capture image frames with 60% forward overlap and 30% sidelap in order to provide sufficient overlap for automatic aerial triangulation and mitigation of building lean in orthophotography produced. Source imagery was acquired during times of optimal environmental conditions. Imagery will generally be captured when solar altitude is 30 degrees or greater and/or by using the most optimal four-hour window, except where capture season offers significantly longer window. Imagery was acquired with ground free of snow cover and deciduous vegetation less than 30% of full bloom. Frames with clouds were rejected and reflown. Any planned deviation from these conditions imposed by capture window constraints was discussed with client prior to commencement of acquisition.


Ortho-Rectification:
Prior to the production of orthophotography, the vendor performed automatic aerial triangulation, utilizing the directly observed Exterior Orientations (EOs) and ground control points (GCPs), measured by a licensed surveyor, for the purpose of orienting the individual frames for creation of the final ortho imagery. In addition to the GCPs, sophisticated matching techniques was employed to automatically create tie points for use in performing a bundle adjustment. The vendor utilized best available Digital Terrain Models, combined with the calibrated camera interior orientations, ground control points, and triangulated EOs to rectify the images. When the rectification requires a resampling of the source imagery, a cubic convolution method was utilized. 
Completeness_Report:
Citywide
Lineage:
Process_Step:
Process_Description:
Metadata imported.
Process_Step:
Process_Description:
Metadata imported.
Cloud_Cover:0
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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:coordinate pair
Coordinate_Representation:
Abscissa_Resolution:0.000256
Ordinate_Resolution:0.000256
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:
Detailed_Description:
Entity_Type:
Entity_Type_Label:Band_1
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:Value
Attribute:
Attribute_Label:Count
Detailed_Description:
Entity_Type:
Entity_Type_Label:Band_2
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:Value
Attribute:
Attribute_Label:Count
Detailed_Description:
Entity_Type:
Entity_Type_Label:Band_3
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:Value
Attribute:
Attribute_Label:Count
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Philadelphia Office of Innovation and Technology
Resource_Description:Downloadable Data
Distribution_Liability:
This dataset contains errors that are an artifact of the interpretation, source material and conversion process. The data and documentation are provided "as is." The City of Philadelphia (CITY) makes no warranty or representation, either express or implied, with respect to the data or accompanying documentation, including its quality, performance or accuracy. The CITY will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the data or any accompanying documentation. The CITY is working to correct errors found in its datasets. Users discovering errors or making corrections to the data are requested to report such errors to the CITY at 215-686-XXXX
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size:220.299
Fees:N/A
Ordering_Instructions:
N/A
Turnaround:N/A
Standard_Order_Process:
Non-digital_Form:
N/A
Digital_Form:
Digital_Transfer_Information:
Transfer_Size:220.299
Fees:N/A
Ordering_Instructions:
N/A
Turnaround:N/A
Custom_Order_Process:
THE CITY OF PHILADELPHIA DOES NOT CURRENTLY HAVE A COMMERCIAL DISTRIBUTION POLICY.
Technical_Prerequisites:
Must have a GIS capable of reading ESRI spatial data formats.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:unknown
Time of Day:unknown
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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
Resource_Description:downloadabledata
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.


Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size:220.299
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Metadata_Reference_Information:
Metadata_Date:2019
Metadata_Contact:
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
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:
Profile_Name:ESRI Metadata Profile
Metadata_Extensions:
Online_Linkage:
Profile_Name:ESRI Metadata Profile
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