Category Archives: science and technology


I was discussing about open source Geospatial tools the other day with my buddies…and world wind was one among them..Here’s an excerpt taken from NASA’S website..please click on the link to get more information…There’s wealth of infromation already avaialble on this..Ping me if you need more information.

World Wind lets you zoom from satellite altitude into any place on Earth. Leveraging Landsat satellite imagery and Shuttle Radar Topography Mission data, World Wind lets you experience Earth terrain in visually rich 3D, just as if you were really there.

Virtually visit any place in the world. Look across the Andes, into the Grand Canyon, over the Alps, or along the African Sahara.

Free GIS!

As we all know there are quite a few behemoths that churn out GIS/RS softwares with huge green tags. I dont have any complaints about those products, i agree they are one of *the* best and stable envoronments availabole for performing any kind of spatial analysis.

But there is very huge need for free source or low priced softwares that could do the work for us. Last time when i was present at one of the geospatial conferences, one woman came up to me asked me if there was any kind of software that has most of the features that ArcView, but with a small price tag! She has tried the ArcExplorer from ESRI, but it doesnt really let her do any kind of analysis as it is more of a dataviewer.

I wasnt quite to sure what to advice her, i said she can try GRASS as it was the only free source software that is very stable and can out perform most of the other GIS softwares that come for a price.

I have tried other platforms such as JUMP and i wasnt really impressed, they are still basic in terms of functionality but definitely a great attempt to provide every one with a tool free of cost. Over the last few months i’ve seen quite a few free tools for perfoming various kinds of spatial analysis and other geospatial processes.

I am going to share all those links so that you guys out there can just click and surf to download those great tools. Toady i came accross couple more interesting tools from one of my old friends, honestly these tools are just awesome! I still wonder how people get that much of time and patience to create such great tools. Kudos to all those great programmers, people, managers and users that have helped make these projects a reality.

Here goes the list

I will keep on adding more stuff as i find more intersting ones, i come accross so many literally that cant keep track of them! Please feel free to add anything that i missed here or or drop me a line if you find anything erroneous or for questions.
once again thanks to all those great folks who develop these free systems. Until then enjoy these free goodies and stop complaining that there isnt anything free for spatial analysis..keep rocking!

is it GIS?

In this burgeoning world of geospatial and location based servives (LBS), there are literally hundreds of products in the market place that offer light to heavy flavor of GIS systems for integration with tracking or other applications.

It is tough to determine whether each product out there meets the traditional underpinnings of a true GIS. As a GIS user myself i was quite amazed to see the development, in the last few years i bet there has been tremendous research going on in this field.

The lack of accepted definition has given rise in many gross misconceptions about what a GIS is, what its capabilities are, and what such system might be used for. Right now GIS has been evangelised as an integral part of the location based services such as asset tracking softwares, GPS tracking using phones, and a lot more. If you have observed closely microsoft has taken over Vicinity corp in the past and started out its own mapping product Mappoint which can be considered a huge sucess, people have inturn realised the potential of mapping software which could be used for routing etec and the same followed with mappoint and other web portals offering routing and trip palnning.

This increase in the people awareness has created a huge market for these systems. In a true sense mappoint can be considered a light weight or light flavor GIS or more approprietly mapping software. But as popularity grew for these systems, the need for more faster systems that could disseminate geospatial data to a wide audience consisting of web as well desktop was realised and soon came the products like Drill down server from Telcontar and similar comapnies. They developed systems that are more conducive for developing applications that need some GIS functionality, and the should be easy enough to be integrated with business systems and satellite communications to develop cutting edge location based systems. The sucess of Google Maps has brought in a wide variety of mapping applications built on top of it. Google has made history in a sense by opening up the API’s to public and letting then mash-up new services. Soon followed suit by Microsoft with their Virtual earth platform. But certainly Google has re-written the euqations in the geospatial industry with a variety of eyecatching and useful products like google earth (previously Keyhole) that work on the slick keyhole platform.

I have used almost all the GIS software out there, and most of them are either used to store, retreive, develop, and maintain a wide vaiety of geospatial data including vector and raster datasets. Not to forget the tremendous capabilities for analysing the data, over the past few years GIS is literally used in almost every domain including hydrology, remotesensing applications, land database management, Transportation applications to name a few. For more applications of GIS checkout ESRI.

I wouldl say it is too early to decide what GIS can do and what not, we still have to wait and see what really cant be done using GIS! so honestly the question “is it GIS?” is determined by the end application that comes out of it. If it is used just to visualize and track assets it could be called Hybrid GIS, if it is used for geospatial data management and analysis- it is true GIS and so on….