When mapping a specific region in R, using a projection centered at 0,0 causes heavy distortion. The PROJ string format allows easily setting a custom projection center (lat_0, lon_0) to match the mapped region's centroid, demonstrated with New Zealand in a Lambert Azimuthal Equal-Area projection using the terra and geodata packages. While PROJ strings are being deprecated in favor of more robust CRS representations, they remain a practical shortcut for defining user-centered projections. The author notes no straightforward non-PROJ alternative currently exists for this workflow.
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