Stratum Data

The number of possible primary sample units per stratum. To download select a year and region, then click download. Available as comma-separated values files (csv).

Variables
Variable Description
REGIONA code indicating the region. DRY TORT: Dry Tortugas, FLA KEYS: Florida Keys, and SEFCRI: Southeast Peninsular Florida.
YEARA number indicating the calendar year.
PROTA boolean indicating the protected status: 1 - protected, 2 - unprotected.
STRATA code indicating the stratum. Differs by region.
NTOTThe number of possible primary sample units for a given year, region, stratum, and protected status.
GRID_SIZEThe length (in meters) to a side of a primary sample unit for a given year, region, stratum, and protected status.
STAGE_LEVELNumber indicating if survey was conducted using a single-stage or two-stage design.