gulf.spatial

Southern Gulf of Saint Lawrence (sGSL) spatial data access, manipulation and mapping package.

Installation:

Packages from the gulf series of packages can be installed directly from GitHub by running the following code from R:

library(devtools)
install_github("TobieSurette/gulf.utils")
gulf.utils::install.gulf()

Basic maps:

# Draw base maps:
map()                # sGSL Base map.         
map(land = FALSE)    # Draw map axes only.
map(border = "grid") # Draw grid border.
map(sea = TRUE)      # Draw bathymetry.

Different areas of the southern Gulf can be brought into focus by using either the region option, or by setting xlim and ylim:

map(region = "GSL")         # The entire Gulf of St. Lawrence.
map(region = "Cape Breton") # Western Cape Breton.
map(region = "PEI")         # Prince Edward Island.
map(xlim = c(-66, -63), ylim = (46, 48))  # Define explicit map bounds.

The following region options are implemented:

A powerful mapping feature is to use the layer option to successively add layers to a map. For example, the following commands draw subsets of science survey stata:

# Draw survey strata:
map(layer = "strata", survey = "rv", stratum = 424:432)
map(layer = "strata", survey = "ns", stratum = 1:5)

# Draw fishing zones:
map(layer = "fishing zones", species = 2526)
map(layer = "fishing zones", species = "snow crab")
map(layer = "fishing zones", species = "american lobster")

## Draw specific zones:
map(layer = "fishing zones", species = "snow crab", zone = "12")
map(layer = "fishing zones", species = "american lobster", lfa = "24")

The following is a list of planned layer options: