https://nenuial.r-universe.dev/ggeohttps://nenuial.r-universe.dev/api/packages/ggeohttps://nenuial.r-universe.dev/ggeo/ggeo.pdfhttps://nenuial.r-universe.dev/ggeo/doc/manual.htmlhttps://nenuial.r-universe.dev/ggeo/NEWShttps://nenuial.r-universe.dev/ggeo/NEWS.txthttps://nenuial.r-universe.dev/ggeo/citationhttps://nenuial.r-universe.dev/ggeo/citation.txthttps://nenuial.r-universe.dev/ggeo/citation.cff