I'm new to GIS developing and i'm trying to work with the JS frameworks to create different layers.
For now, I want to create a contour map which will show values of data I have instead of altitude/heights.
My question is , how do I generate:
1. KML to show contour map or a service which can provide the data?
2. How to build the file based on the values I have? lets say I have different coordinates which represent a cell on the map and each cell has it's value, How do generate the rings , their location , size and distance between each ring for the contour map?