README.md

Google map reference links

1. https://developers.google.com/maps/documentation/javascript/drawinglayer
2. https://developers.google.com/maps/documentation/javascript/examples/user-editable-shapes
3. https://zjor.medium.com/heatmaps-with-google-map-react-57e279315060
4. https://developers.google.com/maps/documentation/javascript/heatmaplayer
5. https://developers.google.com/maps/documentation/javascript/reference/polygon
6. https://developers.google.com/maps/documentation/javascript/examples/polygon-arrays
7. https://developers.google.com/maps/documentation/javascript/shapes

Heat Map Data Sample Reference

https://developers.google.com/maps/documentation/javascript/heatmaplayer