Khaliq, I guess after Justin's recent email, he should be in the best position to give you the block boundary shapefiles for Bihar.
Sharad On Friday, October 10, 2014 7:20:04 AM UTC+5:30, Khaliq Parkar wrote: > > Hi Eric, > > I am working in Bihar within Madhubani district. > Could you link me to the block level shapefiles? Do you know anyone who > has worked at village\panchayat level divisions? > > Thanks! > Khaliq > > On Thursday, 7 August 2014 20:15:45 UTC+5:30, Eric Dodge wrote: > > This is very interesting Sharad. > > > > > > I've been looking for maps of what I've been calling administrative > blocks, that is, the units overseen by block development officers. MGNREGA > data is aggregated at this level and I've been hoping to use the data to do > some mapping exercises. > > > > > > > > > > > > The census sub-districts are called differently across states (tahsil, > taluk, mandal, etc). You can see the list here: > > > > > > > http://censusindia.gov.in/Tables_Published/Admin_Units/Admin_links/subdistrict_nomeclature.html > > > > > > > > > > > > > I know that in all the states where census sub-districts are called > taluk, mandal, or CD block (with the exception of TN), the census > sub-district is identical to the administrative block. > > > > > > > > > > I've already completed a mapping exercise for Bihar using the census > sub-district map and the data matched up pretty well. If the IND_adm3 data > is indeed the administrative blocks then I could do a similar exercise with > Madhya Pradesh. I'll take a look to see if the data lines up correctly. > > > > > > > > > > Has anybody dug into this issue any deeper? I've heard that tehsil comes > from the revenue side whereas taluk, mandal, etc comes from the > administrative side but that doesn't explain why the census uses different > sub-district units across states. > > > > > > > > > > Best, > > Eric > > > > > > > > > > On Thu, Aug 7, 2014 at 7:39 AM, Sharad Lele <[email protected]> wrote: > > > > > > > > > > If I am right, then Justin may want to rename his layer as > CDBlocks_2001... > > > > > > > > > > Sharad > > > > > > > > On Thursday, August 7, 2014 4:28:17 PM UTC+5:30, Sharad Lele wrote: > > > > > > > > > > > > > > > > > > I think I have the explanation for why I am seeing a good match and > > you are not: > > > > > > > > The problem lies in defining what is the 'sub-district' unit (in > > IND_adm3). Administratively speaking, it is tehsil, below which lies > > CD block. Unfortunately, census gives information by CD block. So > > there are more 'sub-district' units in Census than tehsils in the > > country. GDAM seems to have followed the tehsil concept. > > > > > > > > To check: Karnataka is one state in which tehsil and CD block are > > one and the same. That is why the sub-district layer IND_adm3 > > matches perfectly for Karnataka, but not for other states. There > > might be some other states where this holds good, I don't know. > > > > > > > > Anyway, so if one really wants CD block level boundaries, we have to > > look at Justin, I guess. > > > > > > > > But the GDAM boundaries are not 'wrong'. > > > > > > > > Sharad > > > > > > > > > > On 07-Aug-14 9:48 AM, Devdatta Tengshe > > wrote: > > > > > > > > > > > > > > > > > > In Continuation of my previous email, here is a CSV file > > which shows just how bad the GDAM dataset is. > > > > > > > > > > Regards, > > > > > > Devdatta > > > > > > > > > > > > > > > > > > > > On Thu, Aug 7, 2014 at 9:06 AM, Devdatta Tengshe < > [email protected]> > > wrote: > > > > > > > > Hi Sharad, > > > > > > > > I just download the GDAM data again, to confirm what you > > have said. > > > > > > > > I'm going to have to disagree with you about the quality > > of the IND_adm3 data. > > > > > > > > > > > > Acoording to the 2001 Census, there are 5454 Sub > > Districts in India. The GDAM dataset has just 2299 > > features. > > > > > > > > So clearly these taluk features do not correspond to the > > 2001 Census. I cross checked for some areas I have ground > > knowledge of, and I can say that this dataset is not from > > any specific era. Some tehsils in the file were created > > post 2001, while others created in the 90's were not > > present. > > > > > > > > In my opinion the GDAM data is pretty much unusable. > > > > > > > > > > > > Regards, > > > > Devdatta > > > > > > > > > > > > > > > > > > > > > > > > > > On Wed, Aug 6, 2014 at 11:36 > > PM, Sharad Lele <[email protected]> > > wrote: > > > > > > > > I have downloaded and checked the > > GADM boundaries (my version is 2011). The taluka > > boundary layer probably holds good today, > > becuase few talukas get split. Districts get > > split regularly (every so many years) so the > > district boundary layer in this GADM set is > > quite of date (may apply to 2001 or so). The > > spatial registration (positional accuracy is > > ~1km, and the spatial detail is of course not as > > good as the boundaries given in a Survey of > > India 50k topo, but then that is an unfair > > standard, so by a more generalized standard, the > > quality is okay. > > > > > > > > Sharad > > > > > > > > > > > > > > > > On Monday, August 4, 2014 7:20:38 PM > > UTC+5:30, Dilip Damle wrote: > > > > > > Mr Thakkar, > > > > > > > > Please also look at another post (more > > than one) on this group about Taluk > > Shapefiles by Justin Meyers > > > > > > > > So far as I know GADM is the source that > > has Taluk files. > > > > I am not sure about its completeness and > > accuracy as on today > > > > > > > > http://www.gadm.org/ > > > > > > > > On Monday, August 4, 2014 6:23:07 PM > > UTC+5:30, D Thakker wrote: > > > > > > > > > > thanks Dilip for your hardwork. > > > > I have been on a lookout for > > all taluka / tehsil shape file, so > > how do I be in a loop as I am very > > keen to see the repository mail / > > list. > > > > > > > > > > > > On Monday, August 4, 2014 9:50:26 > > AM UTC+5:30, Dilip Damle wrote: > > > > > > Sharad, > > > > > > > > I am working on some things will > > revert in about a week or may be > > more. > > > > > > > > > > Thejesh, > > > > > > > > > > > > > > Go ahead, > > > > > > > > Actually there was one more > > source a Low Resolution > > (vertices) District map by > > VDS technologies. > > > > I have it as Polylines in > > Autocad. I seem to have lost > > the original file. > > > > If anyone has then please > > share it. (it does not seem > > to be on their site now) > > > > > > > > On Sunday, August 3, 2014 > > 11:32:43 PM UTC+5:30, > > Thejesh GN wrote: > > > > > > Actually its > > not a bad idea to list > > it on the wiki. Let me > > know i will create an > > account. > > > > -- > > > > Thejesh GN ⏚ ತೇಜೇಶ್ > > ಜಿ.ಎನ್ > > > > http://thejeshgn.com > > > > GPG ID : > > 0xBFFC8DD3C06DD6B0 > > > > On > > Aug 3, 2014 10:15 PM, > > "Sharad Lele" < > [email protected]> > > wrote: > > > > > > > > Dear > > Dilip and others: > > > > > > > > I have been > > following this > > thread with > > interest, but to be > > honest am a bit lost > > now. Can someone > > post a summary of > > which maps mentioned > > so far have what > > features (which > > coverage, pertaining > > to which year, what > > attributes (such as > > census codes), > > etc.)? Would be most > > helpful. > > > > > > > > Sharad > > > > > > > > > > > > On Friday, August 1, > > 2014 9:03:58 PM > > UTC+5:30, Dilip > > Damle wrote: > > > > > > Hello, > > > > > > > > > > This is an old > > post. > > > > However this is > > the appropriate > > place to add an > > additional > > source. > > > > > > > > I had downloaded > > the set from > > Grid Geneva many > > years ago. > > > > The original > > complete source > > was named as > > GNV197 which is > > 24 MB > > > > Titled as "HUMAN > > POPULATION AND > > ADMINISTRATIVE > > BOUNDARIES > > DATABASE FOR > > ASIA" > > > > I am attaching > > the South > > Central Asia E00 > > file. > > > > > > > > That set > > contains The > > disputed areas > > under the > > country name IN1 > > and IN2 > > > > > > > > This dataset can > > not be easily > > found at present > > on the GRID > > Geneva site > http://www.grid.unep.ch/index.php?lang=en in the > > same name. > > > > may be it is > > still there > > somewhere with > > some other name. > > > > > > > > For copyright > > check the > > metadata file > > which is here > > > > > > > > > http://geonetwork.grid.unep.ch/geonetwork/srv/en/iso19139.xml?id=835 > > > > > > > > > > > > > > rgds > > > > Dilip Damle > > > > > > > > On Wednesday, > > January 4, 2012 > > 9:52:57 AM > > UTC+5:30, > > Karthik > > Shashidhar > > wrote: > > All > > the shapefiles > > for India that > > I have > > downloaded do > > not show PoK > > and Aksai Chin > > as part of > > India. Does > > anyone here > > have access to > > shapefiles > > that include > > these > > territories? > > Basically > > looking to > > publish > > (online) some > > maps, so want > > to make sure > > that it's > > accurate. > > > > > > > > > > > > > > (I looked > > through the > > group > > archives, and > > all sources > > mentioned > > there do not > > show these > > regions as > > part of India) > > > > > > > > > > > > Thanks > > > > Karthik > > > > > > > > > > -- > > > > 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. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > Datameet is a community of Data Science enthusiasts in India. 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