The best replacement for longitude is latitude.

The best alternatives to longitude are rated as following:
★★★★★  latitude
★★  meridians
★  longitude
★  latitude first
★  meridian
★  latitude come first
★  gps
★  utm
  gps coordinates
  latitude longer
  latitude wiki
  latitude parallel
  latitude difference

Your alternative for longitude is not listed? Suggest!
Speaking about longitude, one probably shouldn't forget about google maps.

Other search terms related to longitude and their ratings are:
★★★★★ google maps
★★★★★ an address
★★★ chronometer
★★ map
★★ zip code
★ major cities
You have in mind a companion for longitude and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of longitude in all years. Click on graph for more.
longitude
latitude
meridians