yes thats an error! Please read it as quarter km Mohan > > > > May I point out a small error? > 250 sq. mtr is a small fraction of a sq mile= 2,560,000 sq mtr. > "250m pixel "should be a picture element 250mx250m which will be1/41 > sq.mile. > Obviously the Bharalumukh photo which showed cars and buses with large > gaps are smaller than 1m pixels. > mm > From: "Mohan R. Palleti" > To: "barnali" > CC: [email protected] > Subject: Re: [Assam] Image of Assam from Google earth > Date: Fri, 29 Sep 2006 08:50:12 -0400 (EDT) >>Barnali: >>The discussion on this subject is a very valid one. I have been following >>some of the threads where somebody seems to be happy saying that because >>somebody is bringing down the trees and cultivating it, "we do not live >> in >>the jungles any more" >> >>Then there are these road widening projects mentioned, where they fell >>trees even before doing an afforestation project. >> >>Consequences of loosing our forest cover have been very apparent >> recently. >>The climate has changed. If we do not stop this masacre of the greenery >> we >>might me moving towards desertification. Majority of the growing >>population use trees as firewood. The Per capita trees have to be assesed >>to understand if we have enough trees to sustain the population and >> should >>more tree corridors be created. Should agro-forestry be initiated? >> >>Then there are scruplous wood traders that find permissions to harvest >>trees by paying under the table. I at least know one such case >> personally. >>This was around 2001 when there was a moratorium on cutting trees, this >>guy was able to get permission under the table. How they do it? I have no >>clue. >> >>One difficulty to asses extent of forest is the non-availability of cloud >>free satellite imagery for most of the time of the year. By the time a >> set >>of cloud free imageries are found and put together to make a larger map >>covering the entire state and the image proccesed. A lot of time would >>elapse, and many more land cover changes would have taken place by then. >> >>NASA has a system by which they do provide cloud free 16 day NDVI >>(Normalized Vegetation Index) satellite imageries of the world, by doing >>some processing. The scale is coarse at 250 m pixel resoultion. This >>simply means that one pixel (smallest cell) or dot in the picture is the >>net sum of the greenery measure of 250 square m ( a quarter square mile). >>This is the map which I provided yesterday. I think this is a good data >>set to monitor forestry and agricultural trends. >> >> >>Mohan R. Palleti >> >> >> >> > lots of endless discussion on this topic, >> > >> > i am from the general mass and i knw that sitting smwhere outside >> assam >> > and doing a 9 to 7 job, do not allow you to do smthing for the same. i >> am >> > sorry it might sound very harsh, but the feeling is from inside, is >> there >> > anybody who seriously think about the same, we are on the verge of >> loosing >> > the greenary.. the changing climate (without rain) has already given a >> bad >> > sign.. it might sound funny also but i am sure that unless we educate >> the >> > people to plant even a single plant,nobody thinks seriously, and like >> me, >> > most people think that lots of people are there to think about our >> > environment.. but what is the fact? >> > >> > sorry guys if i am hurting anybody.. >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > Yahoo! Groups Links >> > >> > To visit your group on the web, go to: >> > http://groups.yahoo.com/group/assamonline/ >> > >> > Your email settings: >> > Individual Email | Traditional >> > >> > To change settings online go to: >> > http://groups.yahoo.com/group/assamonline/join >> > (Yahoo! ID required) >> > >> > To change settings via email: >> > mailto:[EMAIL PROTECTED] >> > mailto:[EMAIL PROTECTED] >> > >> > To unsubscribe from this group, send an email to: >> > [EMAIL PROTECTED] >> > >> > Your use of Yahoo! Groups is subject to: >> > http://docs.yahoo.com/info/terms/ >> > >> > >> > >> > >> >> >> >>_______________________________________________ >>assam mailing list >>[email protected] >>http://assamnet.org/mailman/listinfo/assam_assamnet.org >
Mohan Rao Palleti Biodiversity and Spatial Information Center Zoology Department, NCSU David Clark Labs 218 Raleigh, NC 27695-7617 919-513-7292 _______________________________________________ assam mailing list [email protected] http://assamnet.org/mailman/listinfo/assam_assamnet.org
