• While Google Earth works on a downloadable client, Bhuvan works within the browser (only supports Windows and IE 6 and above).
• The ISRO Bhuvan currently has serious performance issues. The site currently very unstable. It gives up or hangs the browser every once in a while. When a layer (state, district, taluk, etc.) is turned on, it renders unevenly and sometimes fails to render at all. The navigation panel failed to load routinely and it felt like a rare sighting when we could actually use the panel.
• The promise of high resolution images has not been kept. While the service promises zoom up to 10 metres from the ground level  as against 200 metres for Google Earth, we didn’t encounter a single image with nearly as much detailing. In fact, comparative results for a marquee location such as New Delhi’s Connaught Place or Red Fort make its clear as to the inferior performance of ISRO Earth as of now.
• The navigation tools are similar to Google Earth (GE).
• The search doesn’t work if a query returns multiple results. A pop up window is supposed to give the multiple results from which the user is supposed to be able to choose. During two days of sporadic testing, we found the result only once. The rest of the time, the window would pop up, but nothing would be displayed. When the search is accurate, the software ‘flies in’ to the exact location, the same way as GE.
• Users need to create an account and download a plug-in.
• Bhuvan packs a lot of data on weather, waterbodies and population details of various administrative units. We were unable to access weather data. Clicking on icons of administrative units show basic information such as the population. For specialist users, Bhuvan might hold some attraction. For instance, there is a drought map which cab be used to compare drought situation across years and there is a flood map that shows Bihar during the Kosi flood and after. With Isro backing, Bhuvan would be able to provide such relevant data from time to time, but the application needs major improvements in terms of usability before it will be of interest to the ordinary user.
• Users can also not edit any data or tag locations.
• We hope Bhuvan is able to fix the bugs soon. But even then, to be a credible alternative to existing mapping services, and even to get new users to try it, it much provide much higher resolution images. User interest will be piqued only when they can see their house or school or local street in high resolution. With Isro data, this is easily doable.

Having said all this,  ISRO Bhuvan is still a very good step forward for ISRO in the right direction we feel. We wish all the best for ISRO and hopefully Bhuvan will mature very fast to become a good service and can really compete with Google Earth.

Google Earth

* Zoom levels up to 200 mt
* Single layer information
* Images upgraded every 4 years
* No alternate viewing options
* Uses international satellites

ISRO Bhuvan

* Zoom levels up to 10 mt
* Multi-layer information
* Images upgraded every year
* Options of viewing on different dates
* Uses Indian satellites

Bhuvan will use images taken by ISRO’s seven remote sensing satellites at least a year ago. These eyes in the sky can capture images of objects as small as a car on the road to build three-dimensional map of the world.

Imagine if you could count the lions in Gir or fishermen find concentration of fish in the sea, just by dragging a mouse
on a computer screen. Space Applications Centre of ISRO has just made that possible by an innovation called Bhuvan.

Bhuvan, meaning earth, is the addition to the numerous scientific innovations by SAC and is a satellite mapping tool, just like Google Earth or Wikimapia, but allows you to zoom far closer than the aerial view from a chopper. If Google Earth shows details upto 200 metres distance and Wikimapia upto 50 metres, Bhuvan will show images upto 10 metres, which means you can easily see details upto a three floor high building and also add information.

Announcing this at the Indian National Cartographic Association (INCA) International Congress here on Tuesday ISRO chairman Dr G Madhavan Nair said, “Bhuvan will use the data recorded by the Indian satellites only. The prototype of Bhuvan will be ready by the end of November and ISRO is hoping to officially launch the service by March next”.

He added that while other mapping sites take four years to update, Bhuvan will be upgraded every year. “This will be able to give you an image from only 10 meters away”, he said to the excited gathering.

Unlike the other two webmaps, Bhuvan will focus only on the Indian sub-continent.

“With Bhuvan we will be able to produce very local information which will be specific to only to our own country. This information available from this mapping system will be useful in addressing very local problems like floods, famines, infrastructure development, education and much more,” Nair said.

“The information on Bhuvan will be layer wise and the options of viewing filtered information will be available. Inputs from a lot of local players, like farmers, fishermen and likes who know the local area in and out, will also being integrated in Bhuvan. This is for the primary reason to make it of more use to the general public,” he said.