1936 Panchromatic Digital Aerial Imagery for Western King County

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:

1936 Panchromatic Digital Aerial Imagery for Western King County

Abstract:

1936 aerial imagery for western King County from scanned 3 foot by 3 foot prints (boards 0.5 in pixels resampled to 1 foot).

Supplemental_Information: None

1. How should this data set be cited?

   King County DOT - Road Services, 20050701, 1936 Panchromatic Digital Aerial Imagery for Western King County: 1936 Section Aerials None, King County DOT - Road Services, King County; WA.

   Other_Citation_Details: None

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.543910

   East_Bounding_Coordinate: -121.960710

   North_Bounding_Coordinate: 47.783419

   South_Bounding_Coordinate: 47.163222

3. What does it look like?

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

   Beginning_Date: 19360101

   Ending_Date: 19370101

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: vector digital 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_36p100

   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

   Entity_and_Attribute_Overview: This is a raster data set and has not tabular attributes.

   Entity_and_Attribute_Detail_Citation: None

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • King County DOT - Road Services

2. Who also contributed to the data set?

   King County DOT - Map and Record Center, King County DOT Road Maintenance, King County GIS Center

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

   King County Dept of Transportation - Road Services Engineering Services
   c/o Jeff Gregg
   Engineer III
   MS: KSC-TR-0231
   Seattle, WA 98104-3856
   US
   

   206-296-3715 (voice)
   206-296-0567 (FAX)
   jeffery.gregg@metrokc.gov
   

   Hours_of_Service: 8am-4pm M-F

Historical comparison and Archiving original documents

1. From what previous works were the data drawn?

   aerial prints (source 1 of 1)

   County, King, 19360101, 1936 Aerial Photos for western King County.

   Type_of_Source_Media: None

   Source_Scale_Denominator: 0

   Source_Contribution: Original hardboard-mounted aerial prints

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

   (process 1 of 6)

   Georeferenced section scans using KCMonument, t-net, hydro, parcels and PLSS layers for heads-up referencing

   Data sources used in this process:

   • TIFF

   Data sources produced in this process:

   • GeoTIFF

   Date: 01-Sep-2006 (process 2 of 6)

   Scanned 3'x3' aerial section prints using a Xerox 8830 scanner (200 dpi) into a uncompressed TIFF format. The original 0.5 foot pixel resolution was resampled to 1 foot pixel.

   Person who carried out this activity:
   

   King County DOT Road Services Engineering Services
   c/o Jeff Gregg
   Engineer III
   MS: KSC-TR-0231
   Seattle, WA 98104-3856
   US
   

   206-296-3715 (voice)
   206-296-0567 (FAX)
   jeffery.gregg@metrokc.gov
   

   Hours_of_Service: 8am-4pm M-F

   Data sources used in this process:

   • XES

   Data sources produced in this process:

   • TIFF

   Date: 01-Feb-2007 (process 3 of 6)

   Mosaiced section scans into King County 7500' tiling sceme

   Person who carried out this activity:
   

   King County DOT - Road Services, Engineering Services
   c/o Jeff Gregg
   Engineer III
   201 S Jackson St
   Seattle, WA 98104-3856
   US
   

   206-296-3715 (voice)
   206-296-0567 (FAX)
   jeffery.gregg@metrokc.gov
   

   Hours_of_Service: 8am-4pm M-F

   Data sources used in this process:

   • GeoTIFF

   Data sources produced in this process:

   • idxp7500

   Date: 01-May-2007 (process 4 of 6)

   7500 tiles delivered to enterprise Spatial Data Warehouse. Scripts used to assemble the correct set of 7500 tiles for each township-range tile. MrSid v5 used to compress TIFF files into township-range mosaics as Generation 3 sids at 7x compression.

   Data sources used in this process:

   • aabb_36p100.tif

   Data sources produced in this process:

   • txxryy_36p100.sid

   Date: 01-May-2007 (process 5 of 6)

   Entire set of 7500 tiles were assembled and mosaiced into Generation 3 MrSid mosaic as reg_36p100.sid. This mosaic was compressed at 30x.

   Data sources used in this process:

   • aabb_36p100.tif

   Data sources produced in this process:

   • reg_36p100.sid

   Date: 01-May-2007 (process 6 of 6)

   7500 tiles were assembled and compressed at 15x into MrSid Generation 3 mosaics for the two zone tiles, znw_36p100.sid and zsw_36p100.sid.

   Data sources used in this process:

   • aabb_36p100.tif

   Data sources produced in this process:

   • zxx_36p100.sid

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?

   None

3. How accurate are the heights or depths?

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

   Western portion of King County WA

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

   None

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

Access_Constraints: None

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 or King County Department of Transportation Road Services Division

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

   King County DOT - Road Services Division, Engineering Services
   c/o Jeff Gregg
   Engineer III
   201 S Jackson St
   Seattle, WA 98104-3856
   US
   

   206-296-3715 (voice)
   206-296-0567 (FAX)
   jeffery.gregg@metrokc.gov
   

   Hours_of_Service: 8am-4pm M-F

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

   reg_36p100.gdb\reg_36p100

3. What legal disclaimers am I supposed to read?

   This imagery is not to be distributed to non-King County (government) users, except where the recipient's use is limited to a specific project only. Recipient's are not to redistribute the data in any way, including public-facing web applications, resale or any other commericial applications. 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?
   • Availability in digital form:

     Data format:	SID

   • Cost to order the data:

     Contact KCGIS Client Services for the cost of reproduction - https://kingcounty.gov/services/gis/GISData/custom-data-orders.aspx

Dates:

Last modified: 21-Nov-2019

Metadata author:

King County Dept of Transportation, Road Services Engineering Section
c/o Jeff Gregg
Engineer III
201 S Jackson St
Seattle, WA 98104-3856
US

206-296-3715 (voice)
206-296-0567 (FAX)
jeffery.gregg@kingcounty.gov

Hours_of_Service: 8am-4pm M-F

Metadata standard:

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