2007 King County (Pictometry) Oblique and vertical Neighborhood-level imagery

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title:

2007 King County (Pictometry) Oblique and vertical Neighborhood-level imagery

Abstract:

Olibque and vertical imagery for western King County accessible via Pictometry ArcGIS 9.2 extension and/or Pictometry Electronic Field Study (EFS) software. In addition to vertical view, four-direction Neighborhood-level views are available in western King County and southwestern Snohomish County, at a nominal 0.5-foot resolution. In eastern King County, in addition to the vertical view, two-direction (N-S) Community-level views are available. Imagery is nominally 1-foot GSD in eastern King .

Supplemental_Information:

The date of each image is also part of the image file itself. The set of integers just before the file-type suffix (such as 070814) refers to standard form 20070814 or August 14 2007. The OrthoSector (Sector) tiles are created from the underlying vertical (ortho) components. The dates associated with the images, either in their indexes, or in the file names themselves, refers to this post-acquisition construction date. Do not use these dates as an indicator of the image acquisition

1. How should this data set be cited?

   Pictometry (under contract with King County), 200805, 2007 King County (Pictometry) Oblique and vertical Neighborhood-level imagery: King County, King County; WA.

   Online Links:

   • None

   Other_Citation_Details: None

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.44

   East_Bounding_Coordinate: -122.23

   North_Bounding_Coordinate: 47.74

   South_Bounding_Coordinate: 47.49

3. What does it look like?

   <http://www.metrokc.gov/gis/sdc/raster/ortho/images/Ortho2007PictometryExtent.jpg> (JPEG)

   Extent of project area showing separate resolution areas by township

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 27-Jun-2007

   Ending_Date: 15-Aug-2007

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: Raster image data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Raster data set. It contains the following raster data types:

      • Dimensions, type Pixel

   2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: State Plane Coordinate System

      State_Plane_Coordinate_System:

      SPCS_Zone_Identifier: Washington North

      Lambert_Conformal_Conic:

      Standard_Parallel: 47.500000

      Standard_Parallel: 48.733333

      Longitude_of_Central_Meridian: -120.833333

      Latitude_of_Projection_Origin: 47.000000

      False_Easting: 1640416.666500

      False_Northing: 0.000000

      Planar coordinates are encoded using Row and column
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in Feet

      The horizontal datum used is North American Datum of 1983; 1991 correction.
      The ellipsoid used is GRS 80.
      The semi-major axis of the ellipsoid used is 20925604.4720406.
      The flattening of the ellipsoid used is 1/298.26.
      

7. How does the data set describe geographic features?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Pictometry (under contract with King County)

2. Who also contributed to the data set?

   Pictometry International Inc

3. To whom should users address questions about the data?

   Mike Leathers
   KCGIS-Center
   GIS Data Coordinator
   201 S Jackson St
   Seattle, WA 98104
   USA
   

   206-263-4867 (voice)
   

Color imagery for 2007

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: May-2008 (process 1 of 2)

   Data provided by Pictometry was copied from Network Attached Storage devices (NAS) to locations on the King County network. Due to size, the Vertical (WAKING07-093-LIB) and Oblique Imagery (WAKING07-093-LIB-ORTHOS) was placed on one server (GISPROD) and the sector tile library (WAKING07-Tiles) was placed on another server (GISDW).

   Date: Jun-2008 (process 2 of 2)

   After setup and testing of the software and data, it was determined that the sector tiles provided in TIFF format by Pictometry (at approximately 83 MB per tile) were too large to perform optimally in their EFS software. (Generally sector tiles are not used in the ArcGIS ArcMAP Pictometry Toolbar as orthos are displayed in the main ArcMap window and oblique views are displayed in the adjunct Pictometry window.) The sector TIFF tiles were resampled to 2-foot resolution using the GP.resample tool. Then the resampled TIFFS were compressed losslessly using MrSid v7. Pictometrys EFS software was used to rebuilt the PMI files for each sid. The three file set (sid, sdw, pmi) were replaced to the Sector Tiles folder. The EFS application was tested against the updated data and performed more efficiently while still providing sufficient resolution at the scale the sector tiles are used.

3. What similar or related data should the user be aware of?

1. How well have the observations been checked?

   There are no attributes associated with these raster data formats.

2. How accurate are the geographic locations?

3. How accurate are the heights or depths?

   Not Applicable

4. Where are the gaps in the data? What is missing?

   Vertical and oblique imagery is available for entire project area

5. How consistent are the relationships among the observations, including topology?

   Each vertical view image is associated with 4 (N,S,W,E) facing oblique image in the Neigborhood area and 2 (N,S) facing oblique images in Community area

Are there legal restrictions on access or use of the data?

Access_Constraints:

Access to the data is limited to King County government agencies and to licensed project partners consisting of selected jurisdictions and public service agencies within the project area. The data, nor the applications to access it, can be redistributed in digital form to any other users or entities.

Use_Constraints:

King County digital data may not be reproduced or redistributed in any form or by any means without the express written authorization of the King County Department of Natural Resources and Parks/KCGIS-Center.

1. Who distributes the data set? (Distributor 1 of 1)

   Mike Leathers
   KC GIS Center
   GIS Data Coordinator
   201 S Jackson St
   Seattle, WA 98104
   USA
   

   206-263-4867 (voice)
   

2. What's the catalog number I need to order this data set?

   oblique07 and oblique07-tiles

3. What legal disclaimers am I supposed to read?

   King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.

4. How can I download or order the data?

Dates:

Last modified: May-2008

Metadata author:

Mike Leathers
KCGIS-Center
GIS Data Coordinator
201 S Jackson St
Seattle, WA 98104
USA

206-263-4867 (voice)
firstname.lastname@metrokc.gov

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)