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 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.
