[Talk-in] Districts of India according to Census 2001/2011

Ashim Kapoor ashimkapoor at gmail.com
Fri Jan 29 06:08:34 UTC 2021


Dear Naveen,

OK and Thank you.

Best Regards,
Ashim

On Thu, Jan 28, 2021 at 5:59 PM Naveen Francis <naveenpf at gmail.com> wrote:
>
> Hello Ashim,
>
> I wish we had opendata of maps from the census department .
> we update the district boundary over a period of time.
> Till 2018, we had only 590 district boundary maps in OSM.
> The approach you have mentioned would not work since it is not updated at Jan 2001 or Jan 2011.
>
> Thanks,
> naveenpf
>
> On Tue, 26 Jan 2021 at 12:34, Ashim Kapoor <ashimkapoor at gmail.com> wrote:
>>
>> Dear Naveen,
>>
>> On Tue, Jan 26, 2021 at 7:50 AM Naveen Francis <naveenpf at gmail.com> wrote:
>> >
>> > Hello Ashim,
>> >
>> > OSM keeps the latest district maps.
>> > 2001/2011 maps are available @ https://github.com/datameet/maps/tree/master/Districts
>> >
>>
>> Can I not use this to extract old data from OSM using diff:-
>>
>> https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#Difference_between_two_dates_.28diff.29
>>
>> Suppose for the sake of a thought experiment that the 2011 Census maps
>> were updated in OSM on January 2011. Can I not :-
>>
>> 1. Get the map of Districts of Uttar Pradesh ( for instance) for 2001.
>> 2. Get the diff of the map of districts of UP for the dates Jan 2011
>> vs Dec 2010.
>>
>> Then see how the Districts of UP have changed from 2001 vs 2011. What
>> do you think about this ?
>>
>> Query  :  In which month were the Census 2021 maps of Districts of
>> India updated? How can I find this out ?
>>
>> > Thanks,
>> > naveenpf
>> >
>> > On Sat, 23 Jan 2021 at 11:34, Ashim Kapoor <ashimkapoor at gmail.com> wrote:
>> >>
>> >> Dear all,
>> >>
>> >> Here is how I  can get the GeoJSON for the latest Districts of India:-
>> >>
>> >> https://wiki.openstreetmap.org/wiki/Districts_in_India
>> >>
>> >> For instance for Uttar Pradesh:-
>> >>
>> >> https://wiki.openstreetmap.org/wiki/Districts_in_Uttar_Pradesh
>> >>
>> >> There is a link at the bottom of the above page which shows me how to extract:-
>> >> [out:xml][timeout:500];
>> >> {{geocodeArea:Uttar Pradesh}}->.searchArea;
>> >> (   relation["boundary"="administrative"]["admin_level"="5"](area.searchArea););
>> >> out meta;>;out meta qt;
>> >>
>> >> My query is : How can I get the GeoJSON for say Districts in Uttar
>> >> Pradesh according to a previous census year, say 2001 ?
>> >>
>> >> Many thanks,
>> >> Ashim
>> >>
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