Metadata: IDENTIFICATION_INFORMATION: Citation: Citation_Information: Originator: United States Geological Survey, Eastern Regional Earth Surface Processes Team, Publication_Date: 2000 Title: Geographic Information Systems Analysis of Topographic Change in Philadelphia, Pennsylvania, During the Last Century. Topographic change data. Description: A scope of work was developed in response to a request by the U. S. Army Corps of Engineers, Philadelphia District. The request was to perform a topographic change grid analysis for the Frankford 7.5-minute quadrangle, 1:24,000-scale topographic map, which includes the Wissinoming neighborhood, and the Germantown 7.5-minute quadrangle, which includes the Logan and Feltonville neighborhoods of the City of Philadelphia. The following tasks were performed under this scope of work: A GPS-corrected GIS grid analysis for each quadrangle was completed and is accompanied by documentation that describes procedures and provides metadata of the informational content of the GIS. A high-resolution global positioning system (GPS) survey was conducted for each topographic quadrangle in order to evaluate and correct systematic discrepancies in elevation between the modern and historic surveys. Prior to release, the fully documented GPS-corrected GIS grid analysis for each quadrangle was reviewed for (1) com-pleteness of documentation and for (2) appropriate analysis and discussion of uncertainties. The following report is in fulfillment of the tasks outlined in this scope of work and was performed by the U. S. Geological Survey for the U. S. Army Corps of Engineers, Philadelphia District under MIPR agreement number: W25PHS93358288. Abstract: See Open-File Report-00-224 for a complete explanation of methods and results. Purpose: The U.S. Geological Survey (USGS), working in cooperation with the U. S. Army Corps of Engineers (ACOE), Philadelphia District, has conducted a study of topographic change throughout the Frankford and Germantown 7.5 minute USGS quadrangles, Philadelphia and Montgomery Counties, Pennsylvania and Burlington County, New Jersey. The purpose of this study is to determine the spatial extent of human-induced topographic change during the past 100 years. The USGS has conducted this study in response to severe structural damage and subsequent condemnation of houses within the Philadelphia city limits, due to differential subsidence of fill material within buried stream valleys. Supplemental_Information: ArcInfo export format files (*.e00), and Portable Document Format (.pdf) files are presented on this CD-ROM. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1999 Ending_Date: 2000 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.250 East_Bounding_Coordinate: -75.000 North_Bounding_Coordinate: 40.125 South_Bounding_Coordinate: 40.000 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: topographic Theme_Keyword: change Theme_Keyword: urban Theme_Keyword: geology Place: Place_Keyword_Thesaurus: none Place_Keyword: Philadelphia Place_Keyword: Pennsylvania Place_Keyword: Wissinoming Place_Keyword: Logan Place_Keyword: Feltonville Place_Keyword: Germantown Place_Keyword: Frankford Access_Constraints: none Use_Constraints: Although all data and software released on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. METADATA_REFERENCE_INFORMATION: Metadata_Date: 20000531 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Eastern Earth Surface Processes Team Contact_Position: Pete Chirico Contact_Address: Address_Type: mailing and physical address Address: 926A National Center, 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192 Country: U.S.A. Contact_Voice_Telephone: Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: pchirico@usgs.gov Hours_of_Service: Monday - Friday 8:00 - 5:00 EST Metadata_Standard_Name: FGDC contact standards for digital geospatial metadata Metadata_Standard_Version: FGDC-STD-001-1998 DATA_QUALITY_INFORMATION: Logical_Consistency_Report: Polygon and chain-node topology present. Completeness_Report: The possible fill grid polygon data is complete and has been revied for consistency and completeness. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2000 Title: Source_Scale_Denominator: 1:24000 Type_of_Source_Media: Digital Elevation Models of historic contour data and current contour data Source_Time_Period_of_Content: Time_Period_Information: 2000 Single_Date/Time: Calendar_Date: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Source_Contribution: This data were developed from the methods explained in Open-File Report-00-224. Process_Step: Process_Description: Process_Date: Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Entity_and_Attribute_Detail_Citation: GRID CODE = 2 - GIS Grid analyisis method shows no positive topographic change GRID CODE = 3 - GIS Grid analyisis method shows 5 feet or more of positive topographic change or evidence of a buried stream channel. GRID CODE = 4 - GIS Grid analyisis method shows 5 feet or more of positive topographic change and evidence of a buried stream channel. MAP_UNIT = possible - GIS Grid analyisis method shows 5 feet or more of positive topographic change or evidence of a buried stream channel. MAP_UNIT = probable - GIS Grid analyisis method shows 5 feet or more of positive topographic change and evidence of a buried stream channel. SPATIAL_REFERENCE_INFORMATION: Horizontal_Coordinate_System_Definition: Geographic: Geographic_Coordinate_Units: Not Applicable Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: Transverse_Mercator: Scale_Factor_at_Central_Meridian: Longitude_of_Central_Meridian: Latitude_of_Projection_Origin: False_Easting: False_Northing UTM_Zone_Number: 17 Planar_Coordinate_Information: Planar_Distance_Units: Planar_Coordinate_Encoding_Method: Coordinate_Representation: Abscissa_Resolution: Ordinate_Resolution: Geodetic_Model: Horizontal_Datum_Name: NAD 83 Ellipsoid_Name: WGS 84 Semi-major_Axis: Denominator_of_Flattening_Ratio: Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Encoding_Method: Altitude_Datum_Name: Altitude_Resolution: Altitude_Distance_Units: DISTRIBUTION_INFORMATION: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Surface Processes Team, Eastern Region Contact_Address: Address_Type: Mailing Address: 12201 Sunrise Valley Drive, National Center MS926A City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: U.S.A. Contact_Voice_Telephone: Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: pchirico@usgs.gov Hours_of_Service: Monday - Friday 9:00 am - 5:00 pm Distribution_Liability: Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Internet Digital_Transfer_Option: http://pubs.usgs.gov/openfile/of00-224/ Offline_Option: Open File Services can provide a copy on CD-ROM To inquire about this Open File Report contact: USGS Information Services Box 25286 Denver, CO 80225 Phone: (303)-202-4700 Fax: (303)-202-4693 Offline_Media: CD-ROM or Portable Document Format map with report Recording_Format: