Sharad, Could you share with the rest of us? Thanks, Justin
On Wednesday, August 6, 2014 2:36:48 PM UTC-4, Sharad Lele wrote: > > Dear Justin: > > I beg to disagree. For Karnataka, which I know best, GADM has 176 > features. Census 2001 shows 175 talukas. Census 2011 has 176 unique taluka > codes. > > Second, boundaries in Karnataka of GADM are okay: i am comparing them with > taluka boundaries I have digitzed from Census handbook itself. > > Sharad > > On 06-Aug-14 11:42 PM, Justin Meyers wrote: > > Sharad, > > > <https://lh5.googleusercontent.com/-45mYgnZbcC0/U-Ju6KmGRCI/AAAAAAAAAKQ/FNF491-pg_0/s1600/gadm.jpg> > GADM is junk. The person who created it doesn't respond to e-mails. I > reached out to him (Dr. Robert Hijmans) a few years back and he was > useless. Currently GADM has 2299 coundaries. See a pic of the two layers > compared (GADM is Green, this dataset is red) > > > Justin > > > On Wednesday, August 6, 2014 1:58:20 PM UTC-4, Sharad Lele wrote: >> >> How does this compare with the maps from the GADM database? >> >> My notes say GADM database maps (India state, district and taluka) show >> district boundaries of 2001 or earlier, with spatial positioning error of >> about 1km, and much more generalized than the boundaries shown on Survey of >> India toposheets. (goes without saying since the topos are at much finer >> scale than such maps) >> >> Sharad >> >> On Wednesday, August 6, 2014 10:49:42 AM UTC+5:30, Dilip Damle wrote: >>> >>> Justin, Devdatta, >>> >>> It's all about how things work in India, >>> >>> Devdatta mentioned SWEat,blood and teARS >>> >>> It also includes the capitalised word :) >>> >>> Good to persevere though. >>> Congratulatioins. >>> >>> Rgds >>> Dilip Damle >>> >>> >>> >>> >>> On Wednesday, August 6, 2014 9:59:13 AM UTC+5:30, Justin Meyers wrote: >>>> >>>> >>>> <https://lh5.googleusercontent.com/-R0Y80NzLfCo/U-GuxQ7iCwI/AAAAAAAAAKA/gdN3wX4skFk/s1600/bihar_sample.jpg> >>>> see the Bihar data compared to this:Red=Bihar Black=this dataset >>>> >>>> >>>> >>>> On Wednesday, August 6, 2014 12:21:27 AM UTC-4, Justin Meyers wrote: >>>>> >>>>> Devdatta, >>>>> This is raw data that I converted from kml to shp. So it took me >>>>> about 30 minutes to make sure the attributes came through properly. >>>>> Cannot >>>>> say my source until I download the rest of the content from the site, >>>>> before they take it down. It seems like they put data on the internet, >>>>> then try to take it down (or hide it...). Not really sure why? I posted >>>>> the Orissa sample for you some time ago, but you never responded? I >>>>> found >>>>> official data for Orissa as well, so converting the census pdfs to gis is >>>>> a >>>>> big waste of time (took me a few days...). >>>>> >>>>> As per the quality of this dataset, it is the best I have seen on a >>>>> national level. But if you look state by state, or really want quality >>>>> data, then this isn't what you want. I would call this dataset a rough >>>>> start. >>>>> >>>>> I posted a update about Bihar ( >>>>> https://groups.google.com/forum/#!topic/datameet/QuP4Tt4n0_g) and >>>>> that data is amazing, this data doesn't hold a candle to it. Too bad the >>>>> government doesn't want help from the experts ;) >>>>> >>>>> Cheers, >>>>> Justin >>>>> >>>>> >>>>> >>>>> On Wednesday, August 6, 2014 12:02:57 AM UTC-4, Devdatta Tengshe >>>>> wrote: >>>>>> >>>>>> Hi Justin, >>>>>> >>>>>> Firstly let me congratulate you on doing this. I'm sure that this >>>>>> must have involved a lot of sweat, blood and tears (Working with >>>>>> government >>>>>> data, usually involves the last one). This is the most up-to-date, >>>>>> comprehensive & complete dataset for sub districts that I have seen. >>>>>> >>>>>> Could you tell us what was the source for creating these boundaries? >>>>>> >>>>>> I'll cross check it with other datasets, and let you know how it >>>>>> goes. >>>>>> >>>>>> Regards, >>>>>> Devdatta >>>>>> >>>>>> >>>>>> >>>>>> On Wed, Aug 6, 2014 at 8:06 AM, Justin Meyers <[email protected] >>>>>> > wrote: >>>>>> >>>>>>> >>>>>>> <https://lh5.googleusercontent.com/-JCJJdFxwIJ4/U-GSaLtnplI/AAAAAAAAAJw/3nhGoIFzCNE/s1600/indiatahsil2001.jpg> >>>>>>> >>>>>>> https://app.box.com/s/vljeiolbqhx2hwyz8qxs >>>>>>> >>>>>>> Processed from a kml; did not edit any geometry or attributes. >>>>>>> Data is pretty generalized, but it is a good start for a national >>>>>>> dataset. >>>>>>> I keep finding better data as I continue to look (already posted two >>>>>>> previous versions of a taluk/ tahsil/ amin 3 boundary). After concerns >>>>>>> to >>>>>>> missing data, this is the best to date I have found. >>>>>>> >>>>>>> Cheers! >>>>>>> Justin >>>>>>> -- >>>>>>> Datameet is a community of Data Science enthusiasts in India. Know >>>>>>> more about us by visiting http://datameet.org >>>>>>> --- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "datameet" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to [email protected]. >>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> >>>>>> -- > Datameet is a community of Data Science enthusiasts in India. Know more > about us by visiting http://datameet.org > --- > You received this message because you are subscribed to a topic in the > Google Groups "datameet" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/datameet/GJKMXXSB-Ns/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- > Democratizing Forest Governance in India > (In press with Oxford University Press India) > > -- Datameet is a community of Data Science enthusiasts in India. Know more about us by visiting http://datameet.org --- You received this message because you are subscribed to the Google Groups "datameet" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
