1993 City of Seattle Panchromatic (B and W) Orthophotography

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: 1993 City of Seattle Panchromatic (B and W) Orthophotography

Abstract:

One-foot panchromatic (black and white) orthophotography obtained from the City of Seattle. Data was acquired under leaf-off conditions.

Supplemental_Information:

Original data was provided by the Originator in their tiling scheme. Data was retiled to standard tiling scheme for King County. Data is available as TIFF and JPG2 compressed versions. TIFF format data is available only at the base tiling level - idxp7500 - defined by a rectangular grid of cells with x-y dimensions of 7500 feet. Primary user data is provided at second tier tiling level - idxptrmbr. This tiling level references the PLSS township-range grid with tiles buffered to a minimum-bounding rectangle of the township. Imagery at this level is provided only as compressed (compression ratio = 7, near lossless) imagery in JPG2000 format. Imagery is also available as larger area mosaics at the idxpzone level (if appropriate) and as a highly compressed entire area of interest mosaic. Both the zone and entire area mosaic, called key region, is provided only as JP2 images.

1. How should this data set be cited?

   Seattle, City of , 19930101, 1993 City of Seattle Panchromatic (B and W) Orthophotography: City of Seattle, Seattle, WA.

   Online Links:

   • None

   Other_Citation_Details: None

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.445374

   East_Bounding_Coordinate: -122.215328

   North_Bounding_Coordinate: 47.780260

   South_Bounding_Coordinate: 47.442248

3. What does it look like?

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

   Beginning_Date: 01-Jan-1993

   Ending_Date: 01-Jan-1993

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: Digital raster data

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • GT-polygon composed of chains (1)

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

      The map projection used is NAD 1983 HARN StatePlane Washington North FIPS 4601 Feet.

      Projection parameters:

      Standard_Parallel: 47.5

      Standard_Parallel: 48.73333333333333

      Longitude_of_Central_Meridian: -120.8333333333333

      Latitude_of_Projection_Origin: 47.0

      False_Easting: 1640416.666666667

      False_Northing: 0.0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.0003280833333333334
      Ordinates (y-coordinates) are specified to the nearest 0.0003280833333333334
      Planar coordinates are specified in foot_us

      The horizontal datum used is D North American 1983 HARN.
      The ellipsoid used is GRS 1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.
      

7. How does the data set describe geographic features?

   x_93p100

   OBJECTID

   Internal feature number. (Source: Esri)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: Esri)

   Coordinates defining the features.

   Shape_Length

   Length of feature in internal units. (Source: Esri)

   Positive real numbers that are automatically generated.

   Shape_Area

   Area of feature in internal units squared. (Source: Esri)

   Positive real numbers that are automatically generated.

   MosaicID

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • City of Seattle

2. Who also contributed to the data set?

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

   King County GIS Center
   c/o Mike Leathers
   GIS Data Coordinator
   201 S Jackson St
   Seattle, WA 98104
   US
   

   206-263-4867 (voice)
   

Archival orthophotos for City of Seattle area

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?

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

Access_Constraints:

Imagery is available for internal use by King County. Other interested parties should contact the Originator directly.

Use_Constraints:

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

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

   King County GIS Center
   c/o Mike Leathers
   GIS Data Coordinator
   201 S Jackson St
   Seattle, WA 98104
   US
   

   206-263-4867 (voice)
   

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

   reg_93p100.gdb\reg_93p100

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: 06-Oct-2003

Metadata author:

King County GIS Center
c/o Mike Leathers
GIS Data Coordinator
201 S Jackson St
Seattle, WA 98104
US

206-263-4867 (voice)
mike.leathers@kingcounty.gov

Metadata standard:

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