Snoqualmie River, 1936 aerial photos

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Puget Sound River History Project, University of Washington.

Publication_Date: 2007

Title: Snoqualmie River, 1936 aerial photos

Geospatial_Data_Presentation_Form: remote-sensing image

Description:

Abstract:

This dataset is part of a collection of historical aerial photographs of Puget Sound rivers that were orthorectified. The photos were recieved in paper format from Terry Butler, Earth Scientist, DNRP/WLRD/RS/Flood Hazard Reduction Services, terry.butler@metrokc.gov, 206-296-1965, King Street Center - DNRP, 201 S Jackson St Ste 600, Seattle, WA 98104.

This image dataset was created from individual scanned aerial photos (stored in TIFF format) which were orthorectified, mosaicked, and tiled based on Washington section boundaries. Data does not necessarily fill each section completely.

Purpose:

Historical mapping of river channel migration of the Snoqualmie River in Snohomish County, Washington, USA.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1936

Time_of_Day: unknown

Currentness_Reference: 1936

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.069287

East_Bounding_Coordinate: -121.869500

North_Bounding_Coordinate: 47.814005

South_Bounding_Coordinate: 47.499229

Keywords:

Theme:

Theme_Keyword_Thesaurus:

REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.

Theme_Keyword: Snoqualmie River

Theme_Keyword: Channel Migration

Theme_Keyword: Puget Sound Rivers

Theme_Keyword: hydrology

Theme_Keyword: Aerial Photographs

Theme_Keyword: Historical Puget Sound Rivers Photographs

Theme_Keyword: Rivers

Theme_Keyword: River History

Place:

Place_Keyword: King County

Place_Keyword: Washington

Place_Keyword: United States

Place_Keyword: Puget Sound

Temporal:

Temporal_Keyword: 1936

Access_Constraints:

This data may be freely downloaded and used. Please give credit to the Puget Sound River History Project, University of Washington.

Use_Constraints:

This data may be freely downloaded and used. Please give credit to the Puget Sound River History Project, University of Washington.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Collins

Contact_Organization: University of Washington

Data_Set_Credit: The Puget Sound River History Project, University of Washington

Security_Information:

Security_Classification: Unclassified

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

This photo set, while being too old to have camera calibration information available, had good overlap from photo to photo so the control is good.

The amX, amY, and amZ values in the Positional Accuracy section represent the average mean square error for the X, Y, and Z coordinates of the control and tie points (in meters).

Completeness_Report:

Images cover the river bottoms and some of the adjacent uplands for the Snoqualmie River from approximately RM 5 to RM 36.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Average mean square error for the X and Y coordinates of the control and tie points, from the Leica Photogrammetry SuiteTriangulation Report (measured in meters):

amX: 1.2204 amY: 1.0389

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Explanation: See: <https://gis.ess.washinghton.edu/data/erdas_pdfs/LPS_PM.pdf>

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Average mean square error for the Z coordinates of the control and tie points, from the Leica Photogrammetry SuiteTriangulation Report (measured in meters):

amZ: 4.8460

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Explanation: See: <https://gis.ess.washinghton.edu/data/erdas_pdfs/LPS_PM.pdf>

Lineage:

Source_Information:

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1936

Source_Currentness_Reference: ground condition

Process_Step:

Process_Description:

Black and white photographs were scanned at 600 pixels per inch and saved as TIFF files. Performed "Auto Levels" in Photoshop and used Photoshop to change all pixels of value 0,0,0 to 1,1,1 (to avoid dropout of 0,0,0 pixels when turning off display of background value 0 in ArcMap). Resulting TIFF images were then orthorectified using Leica Photogrammetry Suite (formerly ERDAS Imagine's OrthoBASE module). Registration sources were USDA NAIP images (<https://gis.ess.washington.edu/data/raster/doqs_naip.html>), a LiDAR DEM (<https://pugetsoundlidar.ess.washington.edu/>), and a USGS 10-meter DEM (<https://gis.ess.washington.edu/data/raster/tenmeter/byquad/>) for one part of one photo with partial LiDAR coverage.

Process_Date: 2007

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Charles Kiblinger

Contact_Organization: University of Washington

Contact_Position: GIS Analyst

Contact_Voice_Telephone: 206.685.7981

Contact_Electronic_Mail_Address: cek@u.washington.edu

Cloud_Cover: None

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 14026

Column_Count: 9573

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

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: 1640416.666667

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 1.000000

Ordinate_Resolution: 1.000000

Planar_Distance_Units: survey feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of Washington

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 0.000

Ordering_Instructions: See: <https://riverhistory.ess.washington.edu/>

Metadata_Reference_Information:

Metadata_Date: 20070822

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Collins

Contact_Organization: University of Washington

Contact_Address:

Address_Type:

REQUIRED: The mailing and/or physical address for the organization or individual.

City: REQUIRED: The city of the address.

State_or_Province: REQUIRED: The state or province of the address.

Postal_Code: REQUIRED: The ZIP or other postal code of the address.

Contact_Voice_Telephone: 206.685.7981

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: None.

Metadata_Use_Constraints: None.

Metadata_Extensions:

Online_Linkage: <https://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile