This project was developed to improve the experience of Web publishers who need to locate coordinates of a rectangle (block) in a Image, in order to use them to enable pop-over and make images more interactive.
Site: https://jantonioavalos.github.io/CSS-Coordinates/
Quick video-tutorial: https://www.useloom.com/share/c2037247016e41279f2eb2b0a9ca7ece