Demo hosted at: opposite.akriya.co.in
API uses barebones Node.js app using Express 4.
Given your latitude and longitude, to find the coordinates of the opposite point:
For the latitude, simply change N to S or vice versa; and,
For the longitude, subtract from 180° and change E to W or vice versa (keep in mind when doing this calculation that a minute is 1/60th of a degree, and a second is 1/60th of a minute, and calculate accordingly.)
E.g., the point opposite 40° 21' N 86° 33' W is 40° 21' S 93° 27' E.
If you're using a system which uses signed longitude and latitude (north and east are positive, by convention; south and west are negative), then: take the negative of the latitude; and add 180° to a negative longitude, or subtract 180° from a positive longitude (again remembering minutes and seconds).
- Using data from Wikidata
- Lotico A social network of active Lotico Semantic Web community members, provided as RDF via resolvable URIs and a SPARQL endpoint.
this existed. why no more info about after '20
- Host own rdf store of this information about people. Or atleast simulated wikidata information
Make sure you have Node.js and the Heroku Toolbelt installed. s
git clone git@github.com:karx/opposite-entity.git
cd opposite-entity
npm install
npm startYour app should now be running on localhost:3147.
heroku create
git push heroku master
heroku open
Alternatively, you can deploy your own copy of the app using the web-based flow:
For more information about using Node.js on Heroku, see these Dev Center articles:
- 10 Habits of a Happy Node Hacker
- Getting Started with Node.js on Heroku
- Heroku Node.js Support
- Node.js on Heroku
- Using WebSockets on Heroku with Node.js
For general support and discussion of this project, please join the Discord server: Discord Invite Link
To check known bugs and see planned changes and features for this project, please see the GitHub issues. Found a bug we don't already have an issue for? Please report it in a new GitHub issue with as much detail as you can!