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Core Transformation Functions

fisheye_fgc()
Apply Focus–Glue–Context Fisheye Transformation
sf_fisheye()
Radial fisheye warp for sf/sfc objects (auto-CRS + flexible centers)
classify_zones()
Classify Coordinates into Focus, Glue, or Context Zones

Visualization Utilities

plot_fisheye_fgc()
Visualize Focus–Glue–Context (FGC) Fisheye Transformation
create_test_grid()
Create a Regular Test Grid of Coordinates

Spatial Transformation Tools

st_transform_custom()
Apply a custom coordinate transform to an sf/sfc object (POINT/LINESTRING/POLYGON/MULTIPOLYGON)

Datasets

vic
Victoria Local Government Areas (sf)
conn_fish
Fisheye-Distorted Hospital–RACF Connections (sf)
vic_fish
Fisheye-Distorted Victoria LGAs (sf)