| gdist | Geodesic distance (great circle distance) between points |
| imap | Interactive Mapping |
| imap.ll | The Imap plotting function - usually called by imap() |
| IMAP-package | Interactive Mapping |
| select.pts | Select points; draw polygons; draw lines |
| world.h.land | GSHHS - A Global Self-consistent, Hierarchical,... |
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