Open Location Codes are a way of encoding location into a form that is easier to use than latitude and longitude.
They are designed to be used as a replacement for street addresses, especially in places where buildings aren't numbered or streets aren't named.
Open Location Codes represent an area, not a point. As digits are added to a code, the area shrinks, so a long code is more accurate than a short code.
[2] Google、地球上のあらゆる場所を数文字で示すplus+codes公開。変換サイトも提供 - Engadget Japanese ( 版) <http://japanese.engadget.com/2015/08/13/google-plus-codes/>
[3] plus+codes: Personal Postcodes ( 版) <http://plus.codes/>
[4] Google Lat Long: Plus codes: A new way to help pinpoint places on the map ( 版) <http://google-latlong.blogspot.jp/2015/08/plus-codes-new-way-to-help-pinpoint.html>
[5] Open Location Code ( 版) <http://openlocationcode.com/>
[6] open-location-code/olc_definition.adoc at master · google/open-location-code ( 版) <https://github.com/google/open-location-code/blob/master/docs/olc_definition.adoc>
[7] open-location-code/comparison.adoc at master · google/open-location-code ( 版) <https://github.com/google/open-location-code/blob/master/docs/comparison.adoc>
[8] Plus codes () <https://plus.codes/>
A plus code is like a street address for people or places that don't have one.
Plus codes give addresses to everyone, everywhere, allowing them to receive deliveries, access emergency services, register to vote – and more.
Plus codes are based on Open Location Code (OLC, for short), an open-source project initiated by a group of Google engineers.
[11] Official Google India Blog: Searching for Indian addresses on Google Maps gets better; Plus Codes -- a simple location-based digital addressing system; Voice Navigation in six additional Indian languages () <https://india.googleblog.com/2018/03/searching-for-indian-addresses-on.html>
[12] Googleマップで地球上のあらゆる地点をコード化するPlus Codesが利用可能に | スラド IT () <https://it.srad.jp/story/18/03/18/0654219/>