- ID: 10
- State: Finalized
- Owner: Matt Deniston
- Spatial Design Category: Generalized Random Tessellation Stratified (GRTS)
- Sites in Design: 350
- Has Location Privacy: No
- Data Repository: <none>
- Created by: Matt Deniston
- Created: 6/1/2012
- Updated by: Jacque Schei
- Updated: 3/19/2013
- Version History: v2.0 Revising (9/10/2015) - v1.0 Finalized (7/21/2012)
The details of this Sample Design, including all the parameters used to generate it, are included below. Sample designs must belong to a Study Plan.
Description
Started with the WA DNR master sample, and then refined the frame to only Municipal Watersheds in King County and streams of Strahler Order 0, 1, or 2. I then stratified based on Ecoregion and Strahler Order to ensure I got a spread of sites in the Puget Lowlands as well as in the Cascades.
Sample Design Parameters
- No user sites
- 4 Panels
- Is stratified
Start Year
2012
Initiation Year
2012
Retirement Year
Study Plan
Data Repositories
<none>
Photos
<none>
Documents
<none>
Map of Sites
- Stratum
- Panel
- Occasion



Area of Inference
<none>
AOI Notes
<none>
This sample design is based on master sample: Washington Statewide Master Sample
Details of this master sample:
- Source: U.S. Environmental Protection Agency
- # of sites: 387237
- Type: Linear Master Sample
Frame
This sample design started with an initial frame of 387,237 sites, based on its master sample. The criteria (based on the master sample's attributes) were then used to refine the sample frame down to 1,337 sites:
County | Is Equal To | King County | AND | ||
Land Management Type | Is Equal To | Municipal Watershed |
Strahler Order | Is Equal To | 0 | OR | ||
Strahler Order | Is Equal To | 1 | OR | ||
Strahler Order | Is Equal To | 2 |
Target Population
<none>
<none>
Panel designs can help address sampling objectives by increasing the total number of samples at a lower overall cost. A common panel structure involves one or more panels with a high revisit frequency (e.g. an “Annual” panel), and other panels with a lower revisit frequency (e.g. a three year “Rotating” panel).
Panel | Sampling Occasion (3 Year(s)) | ||||
# | Panel Name | Panel Abbr. | 1 | 2 | 3 |
1 |
Annual
|
A
|
|
|
|
2 |
Rotating 1
|
R1
|
|
|
|
3 |
Rotating 2
|
R2
|
|
|
|
4 |
Rotating 3
|
R3
|
|
|
|
This design uses the following attributes to create the stratification shown below. Each row in the table represents a stratum. This design’s panels are also shown in the table, even if it uses only a single, default panel.
Attribute | Values In Frame | ||
---|---|---|---|
STRAH_ORD | 3 Values: 0, 1, 2 | ||
ECOREG3_NM | 3 Values: Cascades, North Cascades, Puget Lowland |
Attributes | # Sites In Frame | Frame Length (km) | Stratum Attributes | Panels | ||||||
---|---|---|---|---|---|---|---|---|---|---|
STRAH_ORD | ECOREG3_NM | Stratum Name | Stratum Abbr. | Annual | Rotating 1 | Rotating 2 | Rotating 3 | # of Sites | ||
0 | Cascades | 759 | 0 | StrahlerOrder0-Cascades | SO-Casc | 10 | 5 | 5 | 5 | |
0 | North Cascades | 243 | 0 | StrahlerOrder0-North Cascades | SO-NCas | 10 | 5 | 5 | 5 | |
0 | Puget Lowland | 24 | 0 | StrahlerOrder0-Puget Lowland | SO-PuSo | 6 | 3 | 3 | 3 | |
1 | Cascades | 167 | 0 | StrahlerOrder1-Cascades | S1-Casc | 10 | 5 | 5 | 5 | |
1 | North Cascades | 62 | 0 | StrahlerOrder1-North Cascades | S1-NCas | 10 | 5 | 5 | 5 | |
1 | Puget Lowland | 15 | 0 | StrahlerOrder1-Puget Lowland | S1-PuSo | 4 | 2 | 2 | 2 | |
2 | Cascades | 48 | 0 | StrahlerOrder2-Cascades | S2-Casc | 10 | 5 | 5 | 5 | |
2 | North Cascades | 8 | 0 | StrahlerOrder2-North Cascades | S2-NCas | 2 | 1 | 1 | 1 | |
2 | Puget Lowland | 11 | 0 | StrahlerOrder2-Puget Lowland | S2-PuSo | 2 | 1 | 1 | 1 | |
TOTAL | 0 km |
Below is the complete list of sample sites that were drawn using the criteria for this sample design.
Number of sites before generating the GRTS sample: | 1,337 |
Number of sites after generating the GRTS sample: | 350 |
Number of oversamples: | 190 |
Number of panels: | 4 |
Number of strata: | 9 |

Schema | Attribute | Description |
---|
PROJCS["NAD_1983_HARN_StatePlane_Washington_South_FIPS_4602_Feet", GEOGCS["GCS_North_American_1983_HARN", DATUM["D_North_American_1983_HARN", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Lambert_Conformal_Conic"], PARAMETER["False_Easting",1640416.666666667], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-120.5], PARAMETER["Standard_Parallel_1",45.83333333333334], PARAMETER["Standard_Parallel_2",47.33333333333334], PARAMETER["Latitude_Of_Origin",45.33333333333334], UNIT["Foot_US",0.3048006096012192]]