USGS High Resolution Orthoimagery for the Philadelphia, PA Urban Area

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:

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: <https://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 <https://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 <https://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: <https://seamless.usgs.gov>

Access_Instructions:

The URL <https://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 <https://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: <https://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile