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Synoptic and HBLL survey blocks

Source: R/data.R
survey_blocks.Rd

Survey blocks (grids) for DFO Pacific groundfish surveys including Synoptic (SYN) and Hook and Line (HBLL) surveys. Obtained via gfdata::get_active_survey_blocks() with some cleaning as documented in data-raw/survey_blocks.R.

Usage

survey_blocks

Format

Simple feature (sf) collection with 66744 features and 7 fields:

survey_abbrev

Survey abbreviation. Includes:

  • SYN QCS: Synoptic Queen Charlotte Sound

  • SYN HS: Synoptic Hecate Strait

  • SYN WCVI: Synoptic West Coast Vancouver Island

  • SYN WCHG: Synoptic West Coast Haida Gwaii

  • HBLL OUT N: Hook and Line Outside North

  • HBLL OUT S: Hook and Line Outside South

  • HBLL INS N: Hook and Line Inside North

  • HBLL INS S: Hook and Line Inside South

survey_series_id

Unique identifier for the survey series.

block_id

Unique identifier for each grid cell (BLOCK_DESIGNATION in GFBioSQL).

grouping_code

Strata grouping code used to join with strata data from the GROUPING table in GFBioSQL.

depth_m

Depth in metres.

active_block

Is block actively fished as of date downloaded: e.g., attr(gfdata::survey_blocks, "date-downloaded"))

geometry

Represents grid cell.

area

Overwater area in km^2.

See also

load_survey_blocks for loading this dataset with additional options (polygon, centroid, or coordinate formats).

Examples

requireNamespace("ggplot2", quietly = TRUE)
library(sf)
library(ggplot2)
gfdata::survey_blocks |>
  dplyr::filter(active_block) |>
  ggplot(aes(colour = survey_abbrev)) +
  geom_sf() +
  theme_minimal() +
  scale_colour_brewer(palette = "Dark2")

attr(gfdata::survey_blocks, "date-generated")
#> [1] "2025-07-31"
attr(gfdata::survey_blocks, "date-downloaded")
#> [1] "2025-07-30"