Mapped forest resources for Washington and Oregon, from a 1930s survey

Metadata:

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 36142

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 10

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.99996

Longitude_of_Central_Meridian: -123

Latitude_of_Projection_Origin: 0

False_Easting: 500000.0

False_Northing: 0

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.9786982

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Below you will find a list and description of the files included in this data publication.

VARIABLE DESCRIPTION FILE (1)

1. \Data\_variable_descriptions.csv: Comma-separated values (CSV) file containing a list and description of variables found in all data files. (A description of these variables is also provided in the metadata below.)

Columns include:

Filename = name of data file
Variable = name of variable
Units = units (if applicable)
Precision = precision (if applicable)
Description = description of variable


DATA FILES (2)
(Data are provided as both a SHP and GPKG file.)

1. \Data\coversizecl.shp: Shapefile (and associated files) containing forest and land cover types for both Washington and Oregon, from a 1930s survey of forest resources.

2. \Data\coversizecl.gpkg: OCG geopackage (gpkg) file containing forest and land cover types for both Washington and Oregon, from a 1930s survey of forest resources.


Attributes of both data files include:

FID = FID is a unique identifier of an object within a table.

Shape = Geometry of each feature is listed (all features are polygons in this case).

Area = Area measured in square meters.

Perimeter = Perimeter measured in meters.

OWVEG36_ = Integers correspond with individual polygons.

OWVEG36_ID = Integers correspond with individual polygons.

HVEG36_CD = Integers correspond with the categories from the TYPE_Name_ field. The letter 'w' denotes water.

HVEG36_NAM = Classifications of forest and land cover types from the 1930s Survey of Forest Resources, which include (in alphabetical order):
agricultural zone
balsam fir mountain hemlock upper slope types
cedar-redwood
deforested burns
Douglas-fir
hardwood
juniper
lodgepole pine
non-forest
non-restocked cutover
pine mix
ponderosa pine
pure ponderosa pine
recent cutover
spruce-hemlock
spruce-hemlock-cedar
subalpine and non-commercial
water
western white pine


TYPE_Name_ = Classifications of forest and land cover types from the 1930s Survey of Forest Resources including the subcategories, which include (in alphabetical order, but within a species it would make sense to list from large to small or vice versa):
agricultural land (area cleared and/or cultivated for agricultural use)
balsam fir mountain hemlock small (most dominant trees < 16 inches diameter at breast height [DBH])
balsam fir mountain hemlock upper slope types large (majority of dominant trees >= 16 inches DBH and suitable for sawtimber)
cedar redwood large (sawtimber sized forest with most volume in trees > 24 inches DBH)
deforested burns
Douglas-fir large second growth (majority of the volume in trees 20-40 inches DBH)
Douglas-fir old growth (majority of the volume in trees > 20 inches DBH and area not previously harvested)
Douglas-fir seedling sapling (most of the trees are <= 6 inches DBH)
Douglas-fir small second growth (most volume is in trees 6-20 inches DBH)
hardwoods alder ash maple (forest in which alder, maple, ash, cottonwood, myrtle etc.; predominate)
hardwoods oak madrone (60% or more of any species of oak, including tanoak, or madrone)
juniper (forest composed of 80% or more any species of juniper)
lodgepole pine (forest containing at least 50% of lodgepole or knobcone pine)
non-forest land (barrens, grass, sagebrush, brush, cities, towns and un-meandered water surface)
non-stocked cut-overs (clean-cut areas cut since January 1920 which are not restocking or put to other uses)
pine mixture large (forests containing 20% or more of sugar pine and < 50% of ponderosa pine and most volume is in trees > 22 inches DBH)
pine mixture small (forests containing 20% or more of sugar pine and < 50% of ponderosa pine and most volume is in trees < 22 inches DBH)
ponderosa pine large (dominant trees > 22 inches DBH and no material amount of the stand has been cut)
ponderosa pine seedling sapling (dominant trees < 6 inches DBH)
ponderosa pine small (majority of trees < 22 inches DBH)
pure ponderosa pine large (forests containing 80% or more by volume of ponderosa pine or Jeffrey pine)
recent cut-overs (clean-cut areas cut prior to 1920 which are not restocking)
spruce-hemlock cedar small (most of the volume is in trees 6-20 inches DBH)
spruce-hemlock large(most of the volume in trees > 20 inches DBH)
subalpine and certain non-commercial forests (forests at the upper limit of tree growth, usually unmerchantable)
water
western white pine large (dominant trees > 22 inches DBH)
western white pine small (dominant trees < 22 inches DBH)



SUPPLEMENTAL FILES (2)

1. \Supplements\1930s_Survey_of_Forest_Cover_Types_Oregon.jpg: Joint Photographic Experts Group (JPEG) image file containing a map of Oregon showing historic forest cover types based on a 1930s survey.

2. \Supplements\1930s_Survey_of_Forest_Cover_Types_Washington.jpg: JPEG file containing a map of Washington showing historic forest cover types based on a 1930s survey.

Entity_and_Attribute_Detail_Citation:

Harrington, Constance A. (comp.) 2003. The 1930s survey of forest resources in Washington and Oregon. General Technical Report. PNW-GTR-584. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 123 p. plus CD-ROM. https://doi.org/10.2737/PNW-GTR-584

Metadata_Reference_Information:

Metadata_Date: 20231115

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USDA Forest Service, Pacific Northwest Research Station

Contact_Person: Constance Harrington

Contact_Position: Research Forester

Contact_Address:

Address_Type: mailing and physical

Address: 3625 93rd Ave. S.W.

City: Olympia

State_or_Province: WA

Postal_Code: 98512

Country: USA

Contact_Voice_Telephone: 360-753-7670

Contact_Electronic_Mail_Address: constance.harrington@usda.gov

Contact Instructions: This contact information was current as of original publication date. For current information see Contact Us page on: https://doi.org/10.2737/RDS.

Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001.1-1999