Geotagging is the science of collecting data about geographical locations by using high-resolution photographs. It was invented in 1980 by Robert Loman, and since then it has been improved upon to incorporate the use of GPS. A GPS (Global Positioning System) is a global positioning system that provides precise location information. In the past, the location of a GPS enabled a user to find his location in real time by pointing his camera at it. But today, the GPS comes with a special software that can be installed on a computer, which allows the user to take pictures of interesting landscape features such as mountain peaks or coastal areas etc and get their coordinates. More tips here Geotagging Photos
So if you want to tag your photos with the GPS location data, the first thing you need to do is to download some free exif data from the Internet, like Google Maps. Once you have downloaded one of these, you need to open it using an online map viewer like Google Maps or TileMap. Now, once you are done with this step, you would have to select the appropriate marker that will appear at the location of your photo in the Exif data. As soon as you do this, the software will automatically detect the coordinates of the area that you choose and display it on the screen of the computer.
The last step is to select the longitude and latitude coordinates where you will be taking your geotags. The longitude and latitude coordinate will be used to determine the best place for your photo to be taken, and it is important that you provide correct values of these parameters otherwise your photo may end up as an inappropriate landscape representation. Once you are done with this stage, you can publish your images online using any of the available free web services that allow you to upload and share your images.