image description
Sample Design: NAMF-REP-Test2
ID: 2634
State: Finalized
  • State: Finalized
  • Owner: Scott Miller
  • Spatial Design Category: Generalized Random Tessellation Stratified (GRTS)
  • Data Repository: <none>
  • Snapshot: 4/21/2017
  • Snapshot by: Scott Miller
  • Sites in Design: 80
  • Has Location Privacy: No

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The details of this Sample Design, including all the parameters used to generate it, are included below. Sample designs must belong to a Study Design.

Description

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Sample Design Parameters


Start Year

2017

Study Design

BLM AIM Assessment, Inventory, and Monitoring (AIM) of Wadeable Lotic Systems

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: Bureau of Land Management Lotic

Details of this master sample:



Frame

This sample design started with an initial frame of 67,033 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 2,827 sites:

Criteria Group 1
           
  BLM Field Office Is Equal To Challis Field Office

Target Population

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Test design to see how results vary as a function of sample size or seed


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 (1 Year(s))
# Panel Name Panel Abbr. 1
1
Year 1
YR1
2
Year 2
YR2

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.

Sample Attributes
  Attribute   Values In Frame
  Stream_Order_Group 3 Values: Large Streams (3&4), Rivers (5+), Small Streams (1&2)
Attributes # Sites In Frame Frame Length (km) Stratum Attributes Panels
Stream_Order_Group Stratum Name Stratum Abbr. Year 1 Year 2 # of Sites
Large Streams (3&4) 471 0 Large Streams (3&4) LS 4 4
Rivers (5+) 66 0 Rivers (5+) RV 2 1
Small Streams (1&2) 2290 0 Small Streams (1&2) SS 14 15
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: 2,827
Number of sites after generating the GRTS sample: 80
Number of oversamples: 40
Number of panels: 2
Number of strata: 3

Shapefile

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Distribution

The histogram charts below show the distribution of this sample design’s sites across the various panels and strata.


  Schema   Attribute   Description

PROJCS["USA_Contiguous_Albers_Equal_Area_Conic_USGS_version",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-96.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",23.0],UNIT["Meter",1.0]]

End User License Agreement

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