• Aerial Photography:

    2007 Aerial Photography Waukesha County, Wisconsin

  • 2007 Digital Orthophotography
  • Identification Information
    Citation:
    Citation_Information:
    Originator: Aero-Metric, Inc., Sheboygan, Wisconsin, on behalf of the U.S. Geological Survey and the Southeastern Wisconsin Regional Planning Commission
    Publication_Date: 2007
    Title: SEWRPC 2007 Digital Orthophotography
    Geospatial_Data_Presentation_Form: raster digital data
    Publication_Information:
    Publication_Place: Waukesha, Wisconsin
    Publisher: Southeastern Wisconsin Regional Planning Commission
    Description:
    Abstract: This data set consists of color digital orthophoto files acquired in April 2007. The color files cover the entirety of Milwaukee, Ozaukee, and Waukesha Counties; the southern three survey townships of Washington County; and an approximately 20-square-mile area in the southeast corner of Dodge County in Southeastern Wisconsin. The color orthophoto files were compiled at one-inch-equals-200-feet (1" = 200') scale with a pixel resolution of twelve inches (12"). The image files are available in GeoTIFF or MrSID format. Each color GeoTIFF format file covers an area of 10,000 by 10,000 feet on the Wisconsin State Plane Coordinate System, South Zone, with zero overlap between images. There are a total of 385 GeoTIFF files in the data set with accompanying "world" (".tfw") files. The MrSID format files were prepared from mosaics of the GeoTIFF format files. Each color MrSID format file covers an area of one U.S. Public Land Survey System (USPLSS) township. The 36 MrSID format files contain imagery beyond the boundaries of the survey township and do overlap. The MrSID files have accompanying "world" (".sdw") files.
    Purpose: This data set was collected to provide an inventory of orthophoto images for a portion of the Southeastern Wisconsin Region. The orthophotography will be used by the U.S. Geological Survey for the National Map website and will be used by the Southeastern Wisconsin Regional Planning Commission for broad regional planning purposes.

    Time_Period_of_Content:
    Time_Period_Information:
    Multiple_Dates/Times:
    Single_Date/Time:
    Calendar_Date: 20070420
    Single_Date/Time:
    Calendar_Date: 20070421
    Currentness_Reference: ground condition at the time of aerial photography (April 20 and 21, 2007)

    Status: Progress: Complete
    Maintenance_and_Update_Frequency: As needed

    Spatial_Domain:
    Bounding_Coordinates:
    West_Bounding_Coordinate: -88.567
    East_Bounding_Coordinate: -87.712
    North_Bounding_Coordinate: 43.561
    South_Bounding_Coordinate: 42.826

    Keywords:
    Theme:
    Theme_Keyword_Thesaurus: none
    Theme_Keyword: digital orthophotography
    Theme_Keyword: aerial photography
    Theme_Keyword: image data
    Theme_Keyword: raster data
    Place:
    Place_Keyword_Thesaurus: >Counties and County Equivalents of the States of the United States and the District of Columbia (FIPS Pub 6-3)
    Place_Keyword: Milwaukee County
    Place_Keyword: Ozaukee County
    Place_Keyword: Washington County
    Place_Keyword: Waukesha County
    Place_Keyword: Dodge County
    Place_Keyword: State of Wisconsin

    Access_Constraints: There are no legal prerequisites for accessing this data set. Potential users should contact the Southeastern Wisconsin Regional Planning Commission, GIS Division.

    Use_Constraints: The orthophotography in this data set was acquired in the spring of 2007 and may not reflect current ground conditions.

    Native_Data_Set_Environment: "Z/I Imaging Orthopro ver 4.04, IRAS C ver 8.07, Photoshop ver CS, Windows XP" {{ preceeding citation from metadata prepared by project contractor Aero-Metric, Inc. }}
    Data Quality Information
    Logical_Consistency_Report: This data set was created from aerial photography utilizing orthophoto elevation model files. The orthophoto files were reviewed by the GIS Division staff of the Southeastern Wisconsin Regional Planning Commission for positional accuracy by comparison of the imagery to ground survey control features (section and quarter-section corners of the U.S. Public Land Survey System) and to large-scale topographic mapping.
    Completeness_Report: The color digital orthophoto images in this data set cover the entirety of Milwaukee, Ozaukee, and Waukesha Counties; the southern three survey townships of Washington County; and an approximately 20-square-mile area in the southeast corner of Dodge County. This project area is approximately 1,187 square miles.
    Positional_Accuracy:
    Horizontal_Positional_Accuracy:
    Horizontal_Positional_Accuracy_Report: The orthophoto images in this data set were prepared to meet National Map Accuracy Standards for one-inch-equals-200-feet scale (1:2400 scale) mapping. The resolution of each pixel in the files is twelve inches (12") on the ground. Therefore, ninety percent or more of all well-defined planimetric features visible in the orthophoto files are within approximately eight feet (8') of their true position on the ground.
    "Seventeen (17) QC points were used in the ortho rectification process. All of the QC points were at well-defined locations and used in the aerotriangulation solution. The locations of the 17 QC ground points were compared to their positions on the rectified ortho images. The resulting X and Y residuals were used to calculate the NSSDA horizontal accuracy at the 95% confidence level in feet." {{ preceding citation from metadata prepared by project contractor Aero-Metric, Inc. }}

    Quantitative_Horizontal_Positional_Accuracy_Assessment:
    Horizontal_Positional_Accuracy_Value: 2.5861 {{ preceding citation from metadata prepared by project contractor Aero-Metric, Inc. }}
    Horizontal_Positional_Accuracy_Explanation: "Federal Geographic Data Committee, 1998, Geospatial Positioning Accuracy Standard, Part 3, National Standard for Spatial Data Accuracy, FGDC-STD-007.3-1998" {{ preceeding citation from metadata prepared by project contractor Aero-Metric, Inc. }}

    Lineage:
    Source_Information:
    Source_Citation:
    Citation_Information:
    Originator: Aero-Metric, Inc., Sheboygan, Wisconsin; Wisconsin land surveyors; various other originators
    Publication_Date: unknown
    Title: 2007 aerial photography, control survey information, legacy orthophoto elevation model files and DTM files
    Geospatial_Data_Presentation_Form: digital aerial photography, control survey documents, vector digital data
    Publication_Information:
    Publication_Place: Waukesha, Wisconsin, and other locations
    Publisher: various publishers
    Source_Scale_Denominator: 1200, 2400
    Type_of_Source_Media: digital aerial photography, horizontal and vertical control survey information in digital and hardcopy format, digital orthophoto elevation model and digital terrain model filesSource_Time_Period_of_Content:
    Time_Period_Information:
    Single_Date/Time:
    Calendar_Date: unknown
    Source_Currentness_Reference: ground condition at the time of aerial photography (April 20 and 21, 2007)
    Source_Citation_Abbreviation: none
    Source_Contribution: The orthophoto files were prepared from aerial photography using digital orthophoto elevation model files and control survey information.
    Process_Step:
    Process_Description: This data set was prepared from aerial photography taken in April 2007. The aerial photography was collected using a Digital Mapping Camera from a nominal flight elevation of 10,000 feet. The images were processed with the use of orthophoto elevation model files to create digital orthophoto files in GeoTIFF format. The GeoTIFF files were reviewed by the GIS Division staff of the Southeastern Wisconsin Regional Planning Commission (SEWRPC) for content, appearance, areal coverage, positional accuracy, and file parameters. SEWRPC staff then used the GeoTIFF files to prepare the MrSID format files.
    "Approximately fourteen hundred digital images were aerotriangulated to support digital ortho image production for the following five Wisconsin counties: Ozaukee, Dodge, Washington, Waukesha, and Milwaukee. Airborne GPS data was provided by AERO-METRIC, Inc. The project was referenced to the North American Datum of 1927 (NAD27), state plane Wisconsin south coordinate system horizontally and to the National Geodetic Vertical Datum of 1929 (NGVD29) vertically. Units were in feet."
    "The images, ABGPS data, ground checkpoint data, and camera calibration data were used as inputs to the Zeiss/Intergraph ImageStation Automatic Triangulation (ISAT) softcopy program. ISAT correlated image points and aerotriangulated the block of images to create exposure station exterior orientations. Atmospheric refraction, and earth curvature were taken in to account during the aerotriangulation process. Seventeen ground checkpoints were manually measured on the imagery. These ground checkpoints were included in the aerotriangulation adjustment as unconstrained points for absolute ground location verification."
    "The scale of the aerial IMAGEs was 1 inch = 2117 feet. An Intergraph Z/I Imaging DMC camera was used to aquire color aerial photography with 70% front overlap on 4/20/2007 and 4/21/2007."
    "Rectification was done using the aerotriangulation data, scans, and DEM. These rectified images were used to draw seamlines. The images were then dodged. The dodged rectified images were mosaicked, balanced, and cut into final image sheets. The final sheets were viewed and artifacts were removed as well as other edits performed." {{ preceding citation from metadata prepared by project contractor Aero-Metric, Inc. }}

    Process_Date: 200708
    Process_Contact:
    Contact_Information:
    Contact_Organization_Primary:
    Contact_Organization: Aero-Metric, Inc.
    Contact_Address:
    Address_Type: mailing
    Address: 4020 Technology Parkway
    City: Sheboygan
    State_or_Province: Wisconsin
    Postal_Code: 53083
    Contact_Voice_Telephone: 920-457-3631
    Contact_Electronic_Mail_Address: jnugent@aerometric.com
    Spatial Data Organization Information
    Direct_Spatial_Reference_Method: raster
    Raster_Object_Information:
    Raster_Object_Type: pixel
    Spatial Reference Information
    Horizontal_Coordinate_System_Definition:
    Planar:
    Grid_Coordinate_System:
    Grid_Coordinate_System_Name: State Plane Coordinate System 1927
    State_Plane_Coordinate_System:
    SPCS_Zone_Identifier: 4803
    Lambert_Conformal_Conic:
    Standard_Parallel: 42.733300
    Standard_Parallel: 44.066700
    Longitude_of_Central_Meridian: -90.00
    Latitude_of_Projection_Origin: 42.00
    False_Easting: 2000000.000000
    False_Northing: 0
    Planar_Coordinate_Information:
    Planar_Coordinate_Encoding_Method: coordinate pair
    Coordinate_Representation:
    Abscissa_Resolution: 0.0001
    Ordinate_Resolution: 0.0001
    Planar_Distance_Units: survey feet
    Geodetic_Model:
    Horizontal_Datum_Name: North American Datum of 1927
    Ellipsoid_Name: Clarke 1866
    Semi-major_Axis: 6378206.400000
    Denominator_of_Flattening_Ratio: 294.980000
    Entity and Attribute Information
    Overview_Description:
    Entity_and_Attribute_Overview: This data set consists of a set of color orthophoto files acquired in April 2007. The color images cover the entirety of Milwaukee, Ozaukee, and Waukesha Counties; the southern three survey townships of Washington County; and an approximately 20-square-mile area in the southeast corner of Dodge County. This project area is approximately 1,187 square miles. The color orthophoto images are available in GeoTIFF format and MrSID format.
    Each color GeoTIFF (Tagged Image File Format) file covers a 10,000 by 10,000 foot area or "tile" on the Wisconsin State Plane Coordinate System, South Zone. Each color image file is approximately 286 megabytes in size. The pixel resolution of the images is twelve inches (12") on the ground, with zero overlap between adjacent images. The orthophoto files are named according to the Wisconsin State Plane Coordinate System easting coordinate and northing coordinate, in thousands of feet, of the southwest corner of the image. Each image file includes an accompanying ESRI-format "world" file (".tfw" file extension) containing the coordinate information used to display and register the image in ESRI software. The orthophoto files were prepared to meet National Map Accuracy Standards (NMAS) for one-inch-equals-200-feet scale (1" = 200' scale) mapping. The entire set of 385 color GeoTIFF format files is approximately 110 gigabytes in size.
    The color MrSID (Multi-Resolution Seamless Image Database) format files were prepared from the GeoTIFF format files. Each MrSID file covers approximately one U.S. Public Land Survey System (USPLSS) survey township. Each image file is approximately 160 megabytes in size. The pixel resolution of the images is twelve inches (12") on the ground, with a minimum of 500 feet of image extending beyond the survey township boundaries. The files are named with the township and range number of the survey township. Each image file includes an accompanying ESRI-format "world" file (".sdw" file extension) containing coordinate information used to display and register the image in ESRI software. The entire set of 36 color MrSID format files is approximately 4.5 gigabytes in size.
    Entity_and_Attribute_Detail_Citation: none
    Distribution Information
    Distributor:
    Contact_Information:
    Contact_Organization_Primary:
    Contact_Organization: Southeastern Wisconsin Regional Planning Commission, GIS Division
    Contact_Position: GIS Manager
    Contact_Address:
    Address_Type: mailing address
    Address: P.O. Box 1607
    City: Waukesha
    State_or_Province: Wisconsin
    Postal_Code: 53187-1607
    Contact_Voice_Telephone: (262) 547-6721
    Contact_Facsimile_Telephone: (262) 547-1103
    Resource_Description: SEWRPC 2007 Digital Orthophotography
    Distribution_Liability: This digital data set was created for use by the Southeastern Wisconsin Regional Planning Commission for regional planning purposes. Any other use/application of this information is the responsibility of the user and such use/application is at the user's own discretion and risk. The Southeastern Wisconsin Regional Planning Commission disclaims all liability regarding fitness of the information for any use other than Commission applications.
    Standard_Order_Process:
    Digital_Form:
    Digital_Transfer_Information:
    Format_Name: GeoTIFF (Tagged Image File Format), MrSID (Multi-Resolution Seamless Image Database)
    Format_Information_Content: Digital image
    Transfer_Size: 110,000 (color GeoTIFF files); 4,500 (color MrSID files)
    Digital_Transfer_Option:
    Offline_Option:
    Offline_Media: CD-ROM or DVD
    Recording_Capacity:
    Recording_Density: 650, 4800
    Recording_Density_Units: approximately 650 megabytes per CD-ROM or 4.8 gigabytes per DVD
    Recording_Format: ISO 9660 Level 3
    Fees: $50 per CD-ROM or $100 per DVD, plus tax and shipping. Requesters should inquire of contact organization and contact person.
    Ordering_Instructions: Written requests are preferred.
    Turnaround: Varies
    Metadata Reference Information
    Metadata_Date: 20071121
    Metadata_Contact:
    Contact_Information:
    Contact_Organization_Primary:
    Contact_Organization: Southeastern Wisconsin Regional Planning Commission, GIS Division
    Contact_Position: GIS Manager
    Contact_Address:
    Address_Type: mailing address
    Address: P.O. Box 1607
    City: Waukesha
    State_or_Province: Wisconsin
    Postal_Code: 53187-1607
    Contact_Voice_Telephone: (262) 547-6721
    Contact_Facsimile_Telephone: (262) 547-1103
    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Generated by mp version 2.8.18 on Wed Nov 21 14:27:26 2007