sparta is a minimalistic spatial calculation library for node.js. Currently it supports the calculation of bounding boxes based on the python code from Federico Ramponi (http://stackoverflow.com/a/238558). More features coming soon.
sparta = require('sparta') // return a bounding box of Placa Catalunya, Barcelona with a radius of 1km. sparta.boundingBox(41.386549,2.170004,1);
npm install mocha should mocha