image description
Sample Design: FRD-CO_FINAL
  • ID: 2538
  • State: Finalized
  • Owner: Scott Miller
  • Collaborator(s): None
  • Spatial Design Category: Generalized Random Tessellation Stratified (GRTS)
  • Sites in Design: 93
  • Has Location Privacy: No
  • Data Repository: <none>

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

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Sample Design Parameters


Start Year

2016

Initiation Year

2016

Retirement Year

Study Plan

BLM AIM Assessment, Inventory, and Monitoring (AIM) of Wadeable Lotic Systems v1.0

Data Repositories

<none>

Photos

<none>

Documents

<none>

Map of Sites

  • Stratum
  • Panel
  • Occasion
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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 1,146 sites:

Criteria Group 1
           
  BLM District Is Equal To FRONT RANGE DISTRICT OFFICE

Target Population

BLM perennial streams and rivers in the FRD, CO


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 (2 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
  ADMU_ADMU_NAME 2 Values: ROYAL GORGE FIELD OFFICE, SAN LUIS VALLEY FIELD OFFICE
  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
ADMU_ADMU_NAME Stream_Order_Group Stratum Name Stratum Abbr. Year 1 Year 2 # of Sites
ROYAL GORGE FIELD OFFICE Small Streams (1&2) 279 0 ROYAL GORGE FIELD OFFICE-Small Streams (1&2) S0 2 3
ROYAL GORGE FIELD OFFICE Large Streams (3&4) 382 0 ROYAL GORGE FIELD OFFICE-Large Streams (3&4) S1 4 4
ROYAL GORGE FIELD OFFICE Rivers (5+) 152 0 ROYAL GORGE FIELD OFFICE-Rivers (5+) S2 2 1
SAN LUIS VALLEY FIELD OFFICE Small Streams (1&2) 225 0 SAN LUIS VALLEY FIELD OFFICE-Small Streams (1&2) S3 5 4
SAN LUIS VALLEY FIELD OFFICE Large Streams (3&4) 27 0 SAN LUIS VALLEY FIELD OFFICE-Large Streams (3&4) S4 1 2
SAN LUIS VALLEY FIELD OFFICE Rivers (5+) 81 0 SAN LUIS VALLEY FIELD OFFICE-Rivers (5+) S5 2 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: 1,146
Number of sites after generating the GRTS sample: 93
Number of oversamples: 62
Number of panels: 2
Number of strata: 6

Shapefile

Download

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]]

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