The data from one of the kaggle datset is plotted and clustered. It plot the data with creating a heavy file. The datset was downloaded from https://www.kaggle.com/mchirico/montcoalert.
As the data is in .CSV file so first we converted it into Json data format and saved it as markers.js. The markers.js data format is below, where each block of {} represents a row of .CSV file.
var markers =[ {"e": "1", "addr": "REINDEER CT & DEAD END", "zip": "19525", "title": "EMS: BACK PAINS/INJURY", "timeStamp": "2015-12-10 17:40:00", "twp": "NEW HANOVER", "lat": "40.2978759", "lng": "-75.5812935", "desc": "REINDEER CT & DEAD END; NEW HANOVER; Station 332; 2015-12-10 @ 17:10:52;"}, {"e": "1", "addr": "BRIAR PATH & WHITEMARSH LN", "zip": "19446", "title": "EMS: DIABETIC EMERGENCY", "timeStamp": "2015-12-10 17:40:00", "twp": "HATFIELD TOWNSHIP", "lat": "40.2580614", "lng": "-75.2646799", "desc": "BRIAR PATH & WHITEMARSH LN; HATFIELD TOWNSHIP; Station 345; 2015-12-10 @ 17:29:21;"}]