Editing Western Hemisphere (section)

===Alternative definitions===
In an attempt to match the Western Hemisphere more closely with the Americas, some sources use the [[20th meridian west]] and the diametrically opposed [[160th meridian east]] to define the hemisphere.<ref name=olson>{{citation | last = Olson | first = Judy M | contribution = Projecting the hemisphere | url = https://courseware.e-education.psu.edu/projection/chapter4.html | title = Matching the map projection to the need | editor1-last = Robinson | editor1-first = Arthur H | editor2-last = Snyder | editor2-first = John P | year = 1997 | place = Bethesda, MD | publisher = Cartography and Geographic Information Society, American Congress on Surveying and Mapping | access-date = 2020-03-03 | archive-date = 2016-03-14 | archive-url = https://web.archive.org/web/20160314130049/https://courseware.e-education.psu.edu/projection/chapter4.html | url-status = live }}.<br>- {{citation | contribution = Western Hemisphere | title =  Merriam-Webster's Geographical Dictionary | edition = 3rd | year = 2001 | place = Springfield, Massachusetts | publisher = Merriam-Webster | page = 1294}}.</ref><ref name=brittanica/> This definition excludes all of the European and African mainlands, but still includes some islands associated with these continents, more of eastern Russia and Oceania, and part of Antarctica. It includes all islands of Alaska, but excludes a small portion of northeast [[Greenland]]. There is no hemisphere that includes all of the Americas that also excludes all land outside of it, regardless of the meridians or points chosen to define it.