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Data format: ArcInfo Coverage File or table name: siteclass Coordinate system: Lambert Conformal Conic Theme keywords: siteclass, soils, soil site, site index, private forest land grading system, forest & fish, pflg, forest practices, site class |
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Abstract:
The siteclass data layer was derived from the DNR soils data layer's site index codes and major tree species codes for western and eastern Washington soils contained in the layer's Soils-Main table and Soils-Pflg (private forest land grade) table. Site index ranges in the Soils_PFLG took precedence over site index ranges in the Soils-Main table where data existed. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
The siteclass data layer was derived from the DNR soils data layer's site index codes and major tree species codes for western and eastern Washington soils contained in the layer's Soils-Main table and Soils-Pflg (private forest land grade) table. Site index ranges in the Soils_PFLG took precedence over site index ranges in the Soils-Main table where data existed.
The siteclass data layer was created for use in implementing new Forest Practices' Riparian Management Rules. (See WAC 222-30-021 and 222-30-022.)
Siteclass codes as derived from the soil survey:
For Western Washington, the 50 year site index is used
SITECLASS SITE INDEX RANGE
I 137+
II 119-136
III 97-118
IV 76-96
V 1-75
For Eastern Washington, the 100 year site index is used
SITECLASS SITE INDEX RANGE
I 120+
II 101-120
III 81-100
IV 61-80
V 1-60
In addition to the coding scheme above, the following codes were added for rule compliance:
SITECLASS DESCRIPTION
6 (Red Alder) The soils major species code indicated Red Alder
7 (ND/GP) No data), NA, or gravel pit
8 (NC/MFP) Non-commercial or marginal commercial forest land
9 (WAT) Water body
Rule note: If the site index does not exist or indicates red alder, noncommercial, or marginally commercial species, the following apply: If the whole RMZ width is within those categories, use site class V. If those categories occupy only a portion of the RMZ width, then use the site index for conifer in the adjacent soil polygon.
publication date
Reproduction or redistribution of copyrighted digital data sets or products derived from outside of licensees' organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or part, without permission of the appropriate custodial division of the Washington State Department of Natural Resources. Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the Washington State Department of Natural Resources.
1111 Washington ST SE
PO BOX 47012
Attributes are only as accurate as the WADNR Soil Data Layer from which this coverage is derived.
Site Class data set is statewide but incomplete.
+/- 40 feet
n/a
WADNR SOILS LAYER INFORMATION
LAYER: SOILS
GEN.SOURCE: State soils mapping program
CODE DOCUMENT: State soil surveys
CONTACT: NA
COVER TYPE: Spatial polygon coverage
DATA TYPE: Primary data
Information for the SOILS data layer was derived from the
Private Forest Land Grading system (PFLG) and subsequent
soil surveys. PFLG was a five year mapping program
completed in 1980 for the purpose of forest land taxation.
It was funded by the Washington State Department of Revenue
in cooperation with the Department of Natural Resources,
Soil Conservation Service (SCS), USDA Forest Service and
Washington State University.
State and private lands which had the potential of
supporting commercial forest stands were surveyed. Some
Indian tribal and federal lands were surveyed. Because this
was a cooperative soil survey project, agricultural and non-
commercial forest lands were also included within some
survey areas.
After the Department of Natural Resources originally
developed its geographic information system, digitized
soils delineations and a few soil attributes were
transferred to the system. Remaining PFLG soil attributes
were added at a later time and are now available through
associated lookup tables. SCS soils data on agricultural
lands also have subsequently been added to this data layer.
Approximately 1100 townships wholly or partially contain
digitized soils data (2101 townships would provide complete
coverage of the state of Washington).
SOILS data are currently stored in the Polygon Attribute
Table (.PAT) and INFO expansion files.
COORDINATE SYSTEM: WA State Plane South Zone (5626)
(N. zone converted to S. zone)
COORDINATE UNITS: Feet
HORIZONTAL DATUM: NAD27
PROJECTION NAME: Lambert Conformal Conic
**** MAJOR CODES USED FOR SITECLASS DATA*****
PFLG DATA:
ITEM: PFLG.MAJ.SPEC
TITLE: Potential major tree species for given soil
FORMAT: INPUT OUTPUT DATA DECIMAL ARRAY ARRAY
WIDTH WIDTH TYPE PLACES OCCUR. INDEX
-------------------------------------------------
3 3 C 0 0 0
CODE TABLE OR VALUE RANGE: SOIL.MAJ.SPEC.CODE
DESCRIPTION:
Potentially major tree species for a given soil type. The
data carried by this item describes a major commercial
tree species that could potentially grow on a specific
soil type as identified in the Private Forest Land Grading
program (PFLG). Non-tree codes are also included to map
non-soil ground cover, e.g. water, gravel pits.
ITEM: PFLG.SITE.INDEX
TITLE: Mean site index calc.from trees on given soil
FORMAT: INPUT OUTPUT DATA DECIMAL ARRAY ARRAY
WIDTH WIDTH TYPE PLACES OCCUR. INDEX
-------------------------------------------------
3 3 I 0 0 0
CODE TABLE OR VALUE RANGE: 0-200
DESCRIPTION:
Site index data collected for the Private Forest Land
Grading soils program (PFLG). It is a designation
of the quality of a forest site based on the height of
of the tallest trees (dominant and co-dominant trees)
in a stand at an arbitrarily chosen age. Usually the
age chosen is 50 or 100 years.
For example, if the average height attained by the
tallest trees in a fully stocked stand at the age of 50
years is 75 feet, the site index is 75 feet. Westside
site conditions are estimated by using an index age of
50 years, while eastside site conditions are estimated
by using an index age of 100 years.
--------------------------------------------------------------------
SOILS-MAIN DATA:
CODE TABLE NAME: SOIL.MAJ.SPEC.CODE
-----------------------------------------------------------------------------
CODE MAP/REPORT MAP CODE DESCRIPTION
LABEL SYMB
--------- ------------ ---- --------------------------------------------------
AF ALPINE FIR 0 Subalpine fir
DF DOUGLAS FIR 0 Douglas fir
GF GRAND FIR 0 Grand fir
GP GRAVEL PIT 0 Gravel pit
LP LODGEPOLE PN 0 Lodgepole pine
MFP MAR FOR PROD 0 Marginal forest productivity
NA N/A 0 Not applicable
NC NON-COMMERC 0 Non-commercial
ND NO DATA 0 No data
PP PONDEROSA PN 0 Ponderosa pine
RA RED ALDER 0 Red alder
WAT WATER 0 Water
WH W HEMLOCK 0 Western hemlock
WL W LARCH 0 Western larch
WP W WHITE PINE 0 Western white pine
ITEM: SITE.INDEX.SIDE
TITLE: Indicates 100 yr or 50 yr soil site index
FORMAT: INPUT OUTPUT DATA DECIMAL ARRAY ARRAY
WIDTH WIDTH TYPE PLACES OCCUR. INDEX
-------------------------------------------------
1 1 C 0 0 0
CODE FILE OR VALUE RANGE: SITE.INDEX.SIDE.CODE
DESCRIPTION:
Code used to indicate whether 100 year or 50 year site
index tables are used to calculate the site index of a
soil type. Note that some site indexes for "eastside"
soils are based on the 50 year index table.
SITE.INDEX.SIDE Indicates 100 yr or 50 yr soil site index
CODE FILE SITE.INDEX.SIDE.CODE IS NOT USED BY OTHER ITEMS
CODE MAP/REPORT MAP CODE DESCRIPTION
LABEL SYMB
--------- ------------ ---- --------------------------------------------------
E 100 YR SITE 0 Soil site index based on 100 year table
W 50 YR SITE 0 Soil site index based on 50 year table
------------------------------------------------------------------
Information for the SOILS data layer was derived from the Private Forest Land Grading system (PFLG) and subsequent soil surveys. PFLG was a five year mapping program completed in 1980 for the purpose of forest land taxation. It was funded by the Washington State Department of Revenue in cooperation with the Department of Natural Resources, Soil Conservation Service (SCS), USDA Forest Service and Washington State University.
DERIVATION METHODOLOGY (for Intermediary Product: SOILSITE layer - not
for distribution):
by Laura Vaugeois
Site Class information for all areas where we have soils information.
Coverage derived from the WADNR SOILS layer, for use in implementing the new
(Forest & Fish) legislation. *See siteindex.aml and siteidxpatch.aml for
the programs to derive this data from the SOILS layer. The generic version
of how it was done can be found at the bottom of this file. Original data
in WA State Plane, South Zone projection, NAD 1927. All statements on
accuracy and resolution of the data can be found in the SOILS metadata,
as can the item definitions of the data originally from the soils layer.
*Contact Laura Vaugeois about these programs.
DATAFILE NAME: SOILSITE.PAT July,2001
18 ITEMS: STARTING IN POSITION 1
COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 SOILSITE# 4 5 B -
13 SOILSITE-ID 4 5 B -
17 PFLG.FLD.MAP.CD 9 9 C -from the original soils data
26 PFLG.SURV.CD 2 2 I -from the original soils data
28 ST.SOIL.SYM 4 4 C -from the original soils data
32 TOWN.ID 7 7 I -from the original soils data
39 SOIL.NO 8 8 I -from the original soils data
47 SOIL.MAJ.SPEC 3 3 C -from the original soils data
50 SITE.INDEX 3 3 I -from the original soils data
53 SITE.INDEX.SIDE 1 1 C -from the original soils data
54 PFLG.MAJ.SPEC 3 3 C -from the original soils data
57 PFLG.SITE.INDEX 3 3 I -from the original soils data
60 SOY.SITE.CLASS 1 1 I -site class using the soils-main info
61 PFLG.SITE.CLASS 1 1 I -site class using the soils-pflg info
62 SITE.CLASS 1 1 I -actual site class (preference given
to pflg data)
63 SCNUMERAL 6 6 C -site class in roman numeral format
** REDEFINED ITEMS **
39 TWP.CODE 4 4 I -from the soils data
26 PFLG.SOIL.SYM 6 6 C -from the soils data
17 SOIL.COMB.ID 15 15 C -from the soils data
SOY.SITE.CLASS
-the site class assigned to the polygon based solely on the
data contained int the soils-main table
1 = Site class of 1 as described by the soils-main data
2 = Site class of 2 as described by the soils-main data
3 = Site class of 3 as described by the soils-main data
4 = Site class of 4 as described by the soils-main data
5 = Site class of 5 as described by the soils-main data
6 = Site class of RA as described by the soils-main data
7 = Site class of ND, NA, or GP as described by the soils-main data
8 = Site class of NC or MFP as described by the soils-main data
9 = Site class of WAT as described by the soils-main data
PFLG.SITE.CLASS
-the site class assigned to the polygon based solely on the
data contained int the soils-pflg table
1 = Site class of 1 as described by the soils-pflg data
2 = Site class of 2 as described by the soils-pflg data
3 = Site class of 3 as described by the soils-pflg data
4 = Site class of 4 as described by the soils-pflg data
5 = Site class of 5 as described by the soils-pflg data
6 = Site class of RA as described by the soils-pflg data
7 = Site class of ND, NA, or GP as described by the soils-pflg data
8 = Site class of NC or MFP as described by the soils-pflg data
9 = Site class of WAT as described by the soils-pflg data
SITE.CLASS: final site class (giving preference to PFLG data where it exists. In cases of complex soils/duplicate state soils symbol, the complex that gives
the highest protection is used. Soils-main is used in areas where there is no
corresponding PFLG site index data).
0 = empty inside polygon where there were no surveys
1 = Site class of 1
2 = Site class of 2
3 = Site class of 3
4 = Site class of 4
5 = Site class of 5
6 = Site class of RA
7 = Site class of ND, NA, or GP
8 = Site class of NC or MFP
9 = Site class of WAT (Note by D.Collins:
WAT in soils-main overrode soils-pflg table if waterbody polygon was
mis-identified in pflg table as NA, ND or NC)
SCNUMERAL -added: site class in roman numeral format
I Site class of 1
II Site class of 2
III Site class of 3
IV Site class of 4
V Site class of 5
RA Site class of RA
ND/GP Site class of ND, NA, or GP
NC/MFP Site class of NC or MFP
WAT Site class of WAT
LOGIC FLOW: GOING FROM SITE INDEX TO SITE CLASS FOR FNF RULES.
INPUT DATA:
.soilsall data layer from /database/covers
.soils-main table (strip off excess items to speed up processing)
.soils-pflg table (strip off excess items to speed up processing)
OUTPUT COVER: soilsite (NOT FOR DISTRIBUTION)
-----------------------------------------------
DATA MANIPULATION
."joinitem" the two tables above with soilsall (relate link: st.soil.sym)
.strip unneeded items using "pullitems"
- items kept: soil.maj.spec, pflg.maj.spec; site.index, pflg.site.index,
site.index.side
.additems:
1. soy.site.class
2. pflg.site.class
3. site.class (compare site.class and pflg.site.class - use
pflg.site.class where exists)
4. scnumeral: additional item to change numbers to numerals for
mapping purposes
................................................................................
METHODOLOGY FOR FINAL SITECLASS LAYER (D. Collins) Aug. 2001
The soilsite layer was dissolved by site.class code. Extra care was taken
in the resulting siteclass database to clean up sliver polygons and
labelerrors that originated in the state soils layer. The state soils layer
still contains those errors that were a result of poor edgematching of
individually mapped and digitized soils surveys.
The output siteclass database contains the following:
DATAFILE NAME: SITECLASS.PAT July 2001
18 ITEMS: STARTING IN POSITION 1
COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME
AREA 4 12 F 3
PERIMETER 4 12 F 3
SITECLASS# 4 5 B -
SITECLASS-ID 4 5 B -
SITE.CLASS 1 1 I -site class
SCNUMERAL 6 6 C -site class in roman numeral format
SITE.CLASS site class #
0 = no information in soils data layer (No Soils Information)
1 = Site class of 1
2 = Site class of 2
3 = Site class of 3
4 = Site class of 4
5 = Site class of 5
6 = Site class of RA
7 = Site class of ND, NA, or GP
8 = Site class of NC or MFP
9 = Site class of WAT (water)
SCNUMERAL site class in roman numeral format
I Site class of 1
II Site class of 2
III Site class of 3
IV Site class of 4
V Site class of 5
RA Site class of RA (Red Alder)
ND/GP Site class of ND/GP (NA, No Data or Gravel Pit)
NC/MFP Site class of NC or MFP (Non-commerical/marginal commercial)
WAT Site class of WAT (Water)
ND Site class of 0 (NSI: No Soils Information)
..............................................................................
1111 WASHINGTON ST SE
PO BOX 47012
Internal feature number.
ESRI
Feature geometry.
ESRI
Area of feature in internal units squared.
ESRI
Perimeter of feature in internal units.
ESRI
Internal feature number.
ESRI
User-defined feature number.
ESRI
Site class code - final site class (giving preference to PFLG data where it exists. In cases of complex soils/duplicate state soils symbol, the complex that gives the highest protection is used. Soils-main is used in areas where there is no corresponding PFLG site index data).
WADNR Forest Practices Division
No information in soils data layer (No soils information)
Soils coverage
Site class of 1
Site class of 2
Site class of 3
Site class of 4
Site class of 5
Site class of RA; soils of a major species code indicated Red Alder
Site class of ND, NA, or GP; No data; not applicable; or gravel pit
Site class of NC or MFP; Non-commercial or marginal commercial forest land
Site class of WAT (water); water body; (Note by D.Collins: WAT in soils-main overrode soils-pflg table if waterbody polygon was mis-identified in pflg table as NA, ND or NC)
Site class in roman numeral format
Site class of 1
Siteclass of 2
Site class of 3
Site class of 4
Site class of 5
Site class of RA; soils of a major species code indicated Red Alder
Site class of ND, NA, or GP; No data; not applicable; or gravel pit
Site class of NC or MFP; Non-commercial or marginal commercial forest land
Site class of WAT (water); water body; (Note by D.Collins: WAT in soils-main overrode soils-pflg table if waterbody polygon was mis-identified in pflg table as NA, ND or NC)
The siteclass data layer was derived from the DNR soils data layer's site index codes and major tree species codes for western and eastern Washington soils contained in the layer's Soils-Main table and Soils-Pflg (private forest land grade) table. Site index ranges in the Soils_PFLG took precedence over site index ranges in the Soils-Main table where data existed.
Attributes represent the site class of the polygon as derived from the WADNR Soils Data Layer. The 50 year site index is used for western Washington. The 100 year site index is used for eastern Washington.
1111 WASHINGTON ST SE
PO BOX 47012
The Washington State Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on DNR computers, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographical data or arising out of the delivery, installation, operation, or support by DNR.
ARC/INFO Export Format (.e00)
Data set can be downloaded from the DNR Forest Practices web page under <http://www.dnr.wa.gov/forestpractices/data/>. User must accept a Product License Agreement before obtaining data. An on-line Product License Agreement is available for those downloading data from our web site.
1111 WASHINGTON ST SE
PO BOX 47012