USGS High Resolution Orthoimagery for the Philadelphia, PA Urban Area

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
U. S. Geological Survey, City of Philedelphia Mayor's Office of Information Services, Sanborn Colorado LLC
Publication_Date: Unknown
Title:
USGS High Resolution Orthoimagery for the Philadelphia, PA Urban Area
Geospatial_Data_Presentation_Form: SDE raster digital data
Series_Information:
Series_Name: Urban Area Orthoimagery
Issue_Identification: 0.1
Publication_Information:
Publication_Place: Sioux Falls, SD
Publisher: U.S. Geological Survey
Online_Linkage: <http://seamless.usgs.gov>
Description:
Abstract:
"These files contain 2004 digital orthoimagery of the City of Philadelphia and surrounding watershed area. Image pixel size is 0.5-feet GSD. Image type is natural color. Image horizontal accuracy is ASPRS Class 1 with limiting RMSE of 2.0 feet. Each file contains an image covering 2500 ft. by 2500 ft. on the ground. The coordinate system is Pennsylvania State Plane Coordinate System South Zone, North American Datum 1983."

In February 2006, this data was resampled from 0.5 foot to 0.15 meters and reprojected from NAD 83 State Plane Pennsylvania South FIPS 3702 (Feet) to NAD 83 UTM Zone 18N using the USGS Seamless Data Distribution System.

Purpose:
These data have been created as a result of the need for having geospatial data immediately available and easily accessible in order to provide geographic reference for Federal, State, and local emergency responders, as well as for homeland security efforts. Orthoimages also serve a variety of purposes, from interim maps to field references for earth science investigations and analysis. The digital orthoimage is useful as a layer of a geographic information system. These data can be used to provide reference information for Web browsers and for map applications at a scale of 1:100,000 or smaller. Larger scale orthoimagery such as digital orthophoto quadrangles will be more accurate, but often at the expense of timely updates.
Supplemental_Information:
The data obtained through The Seamless Server is considered to be the "best available" data from USGS. Historical data and other data may be obtained by contacting Customer Services, Center for Earth Resources Observation & Science, at 1-800-252-4547. Information in quotation marks, initial processing steps, accuracy reports, and source information is taken directly from the original metadata.Spatial-specific information not available
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-75.1734919029439
East_Bounding_Coordinate:-75.1643265314176
North_Bounding_Coordinate:39.958197956741
South_Bounding_Coordinate:39.941385813449
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: digital spatial data
Theme_Keyword: 0.15 meter orthoimage
Theme_Keyword: rectified image
Theme_Keyword: orthophoto
Theme_Keyword: natural color orthophoto
Theme_Keyword: orthoimage
Theme_Keyword: image map
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: geoscientificInformation
Theme_Keyword: location
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard 10-4,): Washington, D.C., National Institute of Standards and Technology
Place_Keyword: United States
Place_Keyword: U.S.
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology
Place_Keyword: PA
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Philadelphia
Access_Constraints: None
Use_Constraints:
There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to <http://www.usgs.gov/privacy.html> for the USGS disclaimer.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Data_Set_Credit: U.S. Geological Survey
Security_Information:
Security_Classification_System: None
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 9.1.0.722

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
"Radiometry is verified by visual imspection of the the digital orthophoto. Slight systematic radiometric differences may exist between adjacent orthoimage files. These are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adgacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adgacent images for better color tone matching."
Logical_Consistency_Report:
"All TIFF and World File tagged data and image file sizes are validated using commercial GIS software to ensure proper loading before being archived. This validation procedure ensures correct physical format and field values for tagged elements. Seamline maismatches are not corrected unless the overall displacement exceeds one meter."
Completeness_Report:
"Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images. Source imagery is cloud free. Photography was flown during leaf-off seasons in deciduous vegetation regions. Source imagery from the City of Philadelphia Mayor's Office of Information Services covers all of Philadelphia County and surrounding watershed area, being the east portions of Delaware County, Montgomery County and Bucks County, Pennsylvania. This imagery does not cover the Philadelphia Urban Area footprint."
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
"This image complies with National Map Accuracy Standards. It has been tested at 90% confidence level to be within 8.0 ' of well-defined points in unobscured areas. Does not apply to vertical surface features, such as structures, appearing in digital orthophotography due to inherent lean."
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 2.00
Horizontal_Positional_Accuracy_Explanation: National Map Accuracy Standards
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: n/a
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: 2004
Title: 0.5-foot pixel resolution orthoimage.
Geospatial_Data_Presentation_Form: remote-sensing image
Type_of_Source_Media: digital raster file
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040325
Ending_Date: 20040423
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: orthoimage
Source_Contribution: n/a
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: Unknown
Title:
Digital elevation models were updated or compiled from 2004 aerial photography using first order softcopy stereo plotters.
Source_Scale_Denominator: 24000
Type_of_Source_Media: digital raster file
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
DEM, photogrammetrically updated from the newly acquired aerial photography.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: Unknown
Title:
Existing Sanborn Colorado LLC. DEM, photogrammetrically updated from the newly acquired aerial photography.
Source_Scale_Denominator: 24000
Type_of_Source_Media: digital raster file
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: DEM
Source_Contribution:
DEM, photogrammetrically updated from the newly acquired aerial photography.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: Unpublished material
Title: GPS survey ground control
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Unknown
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Horizontal Ground Control
Source_Contribution:
Ground control was collected by either targeting or paneling permanent City of Philadelphia supplied monuments or photo-identifiable points. Coordinates were collected using ground survey techniques.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: Unpublished material
Title: Aerotriangulation Control
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040325
Ending_Date: 20040423
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: check points
Source_Contribution:
Horizontal and vertical check points and External Orientation Parameters. Check points consist of photo-identifiable horizontal ground control. External Orientation Parameters derived through aero-triangulation are used as control input to the Orthorectification process.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Sanborn Colorado LLC
Publication_Date: 2004
Title: 0.5-foot pixel resolution Orthoimage
Type_of_Source_Media: digital raster file
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: unknown
Ending_Date: unknown
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: orthoimage
Source_Contribution:
0.5-foot pixel resolution orthoimages were created from aerial film flown during March and April, 2004 using a standard aerial film camera, manufacturer and USGS calibration date unknown. Control source was paneled or photo identified ground control points. Scanning resolution was 14 microns.
Process_Step:
Process_Description:
Original processing information not provided. See Source Information for details.
Process_Date: Unknown
Process_Step:
Process_Description:
In February 2006, this data was resampled from 0.5 foot to 0.15 meters and reprojected from NAD 83 State Plane Pennsylvania South FIPS 3702 (Feet) to NAD 83 UTM Zone 18N using the USGS Seamless Data Distribution System. The metadata were imported and updated for display through the Seamless Data Distribution System at <http://seamless.usgs.gov>
Process_Date: 200602
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Service Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605-594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605-594-6933
Contact_Facsimile_Telephone: 605-594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The USGS point of contact is for questions relating only to the data display and download from this web site. For questions regarding data content and quality, refer to original processor.

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 12430
Column_Count: 5196
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.150000
Ordinate_Resolution: 0.150000
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_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.000000
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Natural color orthoimagery is organized in three color bands or channels which represent the red, green, and blue (RGB) portions of the spectrum. Each image pixel is assigned a triplet of numeric values, one for each color band. Numeric values range from 0 to 255. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0.
Entity_and_Attribute_Detail_Citation:
U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The USGS point of contact is for questions relating only to the data display and download from this web site. For questions regarding data content and quality, refer to the original processor.
Resource_Description: Downloadable Data
Distribution_Liability:
Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Arc/Info Export Format and/or ArcView Shapefile
Format_Version_Number: ArcGIS 9.1
Format_Specification: ASCII
Transfer_Size: 0.001
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://seamless.usgs.gov>
Access_Instructions:
The URL <http://seamless.usgs.gov> provides a map interface that allows for data downloads within a customer defined area of interest. Zoom tools are available that can be used to investigate areas of interest on the map interface. The download tool allows the customer to capture layers from the map, utilizing the Seamless Data Distribution System process for downloading. A request summary page is then generated with the download layers listed. By clicking the "download" button on the summary page, a zipped file will be generated that can be saved on the customer's computer. The file can then be unzipped and imported into various user software applications.
Online_Computer_and_Operating_System: Not available for dissemination
Fees: None
Turnaround: Variable
Technical_Prerequisites:
ESRI ArcGIS Suite and/or Arc/Info or other compatible software, and supporting operating systems.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown

Metadata_Reference_Information:
Metadata_Date: 20060323
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The above is the contact information for the USGS Center for Earth Resources Observation and Science in Sioux Falls, SD. This is the digital data storage and distribution center for the USGS. Metadata information can also be obtained through online services using The National Map Viewer, at <http://nationalmap.usgs.gov>
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Thu Mar 23 12:36:46 2006