what are geographical mark up language (GML) and Key Hole Markup Language(KML)?

Question

What are they used for?

Answer 1

They are XML documents that describe geographical data in Google Maps, Earth, and Mobile. Below is an example of this KML XML data...




My Pretend City
Pretend City

-67.114392,39.716771,0




This data above shows the coordinates on Google earth for a made up city I called "Pretend City". Using this data, Google Earth will then be able to locate the city and provide other geographical data about the location based on the coordinates (which are latitude and longitude).

The language was originally designed by a company that Google bought out and was originally the software was called Keyhole.

Hope this helps you out! Enjoy!