Introduction :

2D Bhuvan, a web mapping service application, provides a highly responsive, intuitive mapping interface with detailed imagery and embedded map data. It is based on the OpenLayers Open Source Project which offers powerful, user-friendly mapping technology to organize the satellite data and map data. Some of the functional capabilities of Bhuvan 2D are Map Navigation, Map Panning, its ability to add a point, polygon, line on the terrain, add drawings, measure area and distance on the terrain

Home: The ‘Home’ icon on the top right hand side corner of the page, takes the user back to the homepage, from their current location on the Bhuvan geo-portal.

Help: The ‘Help’ icon on the top right hand corner of the page gives detailed instructions to the users about using and navigating on Bhuvan 2D.

Tool Button: The ‘Tool Button’ on the top right hand corner of the page, when clicked, expands to display 7 different tools. These seven tools perform the following functions:

Zoom-In: This tool helps the users to zoom-in to a particular location from their current location on the 2D map.

Zoom-Out: This tool helps the users to zoom-out to a particular location from their current location on the 2D map.

Full- Extent: The Full-Extent tool helps to zoom out of the current location of the user to the maximum extent of the map. 

Fixed Zoom-In: This tool helps the users to zoom-in to a particular location in a fixed manner, from their current location on the 2D map. Users can zoom into a location at a fixed level of zoom, at a time.

Fixed Zoom-Out: This tool helps the users to zoom-out to a particular location in a fixed manner, from their current location on the 2D map. Users can zoom out from a location, at a fixed level of zoom, at a time.

Go Back to Previous Extent: This tool takes the users to the immediate previous location accessed by them on the Bhuvan 2D map. With the help of this button, users can go back to all the pages they had accessed, in the backward order.

Go to the Next Extent: This tool takes the users to the pages accessed by them on the Bhuvan 2D Map, in a forward manner.

Overview Map: The Overview Map feature displays an additional view of the earth, with a position indicator that corresponds to the user’s current view inside the 2D map. This shows a miniature overview of the user’s current location on the map, and also reflects the change on the overview map as the user navigates on the 2D map.