The akgfmaps package is used to vector geometries ('shapefiles') that are commonly needed for mapping and spatial analysis in Alaska marine management areas, marine statistical areas, and fishery-independent survey regions in Alaska.
The package includes:
- Groundfish and crab bottom trawl survey areas in the eastern Bering Sea shelf (EBS), eastern Bering Sea slope (BSS), northern Bering Sea (NBS), eastern Chukchi Sea (ECS), Gulf of Alaska (GOA), and Aleutian Islands (AI).
- Longline survey areas in the BSS, GOA, and AI.
- National Marine Fisheries Service (NMFS) statistical area layer.
- Alaska Department of Fish and Game (ADFG) management and statistical area layer.
- Alaska Ecosystem Status Report (ESR) area and subarea layers.
- Bering Sea Integrated Ecosystem Research Program (BSIERP) area layer.
- Historical International North Pacific Fisheries Commission (INPFC) groundfish area layer for the Aleutian Islands and Gulf of Alaska.
- Functions for common spatial tasks performed by Alaska fisheries researchers (e.g. generating two-dimensional grids in multiple coordinate reference systems, producing qualitative distribution maps in the EBS and NBS).
Please submit an issue if you encounter problems or errors with the package.
See NEWS for information about package updates.
The package can installed for R versions >= 4.0 using the using the following code:
devtools::install_github("afsc-gap-products/akgfmaps", build_vignettes = TRUE)
Layers in the package are saved locally during installation. Therefore, the package must be re-installed to access new geometries when they become available.
Vignettes can be accessed using:
browseVignettes('akgfmaps')
The package is intended for users to install and access layers using the package to ensure vector geometries are version-controlled for code-based analyses and visualizations. However, zip files containing the most recent versions of the bottom trawl survey shapefiles and associated metadata are provided for download here.
The table below lists the vector geometry layers (polygons) in the package by region (AI = Aleutian Islands, BSS = eastern Bering Sea Slope, ECS = eastern Chukchi Sea, GOA = Gulf of Alaska, NBS = Northern Bering Sea, SEBS = southeastern Bering Sea continental shelf).
| Region | Layer | Function | Contributor/Creator | Source |
|---|---|---|---|---|
| All | Alaska Coastline (1:63360) - Full | get_base_layers() | Alaska DNR | Link |
| All | Alaska Coastline (1:63360) - Simplified | get_base_layers() | Alaska DNR | Link |
| All | Russia Coastline | get_base_layers() | A. Grieg (AFSC Ret.) | |
| All | Canada Coastline | get_base_layers() | A. Grieg (AFSC Ret.) | |
| All | ADFG Statistical/Management Areas | get_adfg_areas() | M. Callahan (PSMFC/AKFIN) | Link |
| All | NMFS Statistical Areas | get_nmfs_areas() | A. Jahn (AKRO) | Link |
| All | Ecosystem Status Report Areas/Subareas | get_esr_regions() | M. Callahan (PSMFC/AKFIN) | Link |
| All | North Pacific bathymetry (0-1000 m) | get_base_layers() | A. Grieg (AFSC Ret.) | GEBCO 1998 |
| AI | Bottom trawl survey area | get_base_layers() | N. Laman (AFSC) | |
| AI | Groundfish survey strata | get_base_layers() | N. Laman (AFSC) | |
| AI | Bottom trawl survey grid | get_base_layers() | N. Laman (AFSC) | |
| AI/BSS/GOA | Longline survey stations | get_base_layers() | K. Echave (AFSC) | Link |
| AI/BSS/GOA | Longline survey strata | get_base_layers() | K. Echave (AFSC) | Link |
| AI/BSS/GOA | Longline survey area | get_base_layers() | K. Echave (AFSC) | Link |
| BSS/NBS/SEBS | BSIERP Regions | get_bsierp_regions() | M. Callahan (PSMFC/AKFIN) | Link |
| BSS | Groundfish survey area | get_base_layers() | A. Grieg (AFSC Ret.) | |
| BSS | Groundfish survey strata | get_base_layers() | A. Grieg (AFSC Ret.) | |
| ECS | Bottom trawl survey area | get_base_layers() | B. Lauth (AFSC Ret.) | |
| ECS | Bottom trawl survey grid | get_base_layers() | B. Lauth (AFSC Ret.) | |
| GOA | Bottom trawl survey area | get_base_layers() | N. Laman (AFSC) | |
| GOA | Groundfish survey strata | get_base_layers() | N. Laman (AFSC) | |
| GOA | Bottom trawl survey grid | get_base_layers() | N. Laman (AFSC) | |
| NBS | Bottom trawl survey area | get_base_layers() | J. Conner (AFSC) | Link |
| NBS | Groundfish survey strata | get_base_layers() | J. Conner (AFSC) | Link |
| NBS | Bottom trawl survey grid | get_base_layers() | J. Benson (AFSC Ret.) | |
| NBS | Norton Sound RKC strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | Bottom trawl survey area | get_base_layers() | J. Conner (AFSC) | Link |
| SEBS | Groundfish survey strata | get_base_layers() | J. Conner (AFSC) | Link |
| SEBS | Bottom trawl survey grid | get_base_layers() | J. Benson (AFSC Ret.) | |
| SEBS | Bristol Bay RKC strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | EBS Snow crab strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | EBS Tanner crab strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | Pribilof Island BKC strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | Pribilof Island RKC strata | get_crab_strata() | E. Ryznar (AFSC) | |
| SEBS | St. Matthew's BKC strata | get_crab_strata() | E. Ryznar (AFSC) |
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