Usage:
1. Sign in NianticLabs@Google Ingress Site and click icon 
;
2. Set Bounds and Click "Query".
The blog provides usage & how to install crx DONATE 0.99
Developed by Mindon Feng from Mindon.IDEA
with Javascript/HTML5/ NodeJs/ MongoDB/ PhoneGap skills and learning Go Language
Who Enjoy Developing NodeJS Apps and Chrome Apps & Extensions :-)
Thanks NianticLabs@Google, and ShawTim for "Ingress: HK Portal List Extension".