Went ahead and just traced the boundaries in QGIS using the geotiff as reference. Never done it before so was a good exercise. Took a couple of hours.
Geojson in this PR: https://github.com/datameet/Municipal_Spatial_Data/pull/59 On Thu, Nov 16, 2023 at 2:42 AM Eric Leclerc <ejr.lecl...@gmail.com> wrote: > Hi > > I am professor of geomatic in France and I gave an exercice about Chennai > to my master’s students who need to map census data (i.e. prior to October > 2011 changes on delineation of wards). > > Thanks for helping. > > > Très cordialement > > Eric Leclerc > > > > > Le 13 nov. 2023 à 21:34, Arun Ganesh <arungra...@gmail.com> a écrit : > > Don't have a shapefile, but the old CMDA masterplan was the only clear map > of the ward boundaries that i've seen: > https://www.cmdachennai.gov.in/Volume2_English_PDF/Chennai-StreetAlign.pdf > <https://www.cmdachennai.gov.in/Volume2_English_PDF/Chennai-StreetAlign.pdf> > > The best i've managed to do is to georeference a cleaned up version of the > above map so it is available as a geotiff. One would need to manually trace > out the lines in QGIS to create a shapefile which could be a bit tedious, > but the only way if you really need it. > https://mapwarper.net/maps/77607#Preview_Rectified_Map_tab > > Would be great to know why the sudden interest in the pre 2011 ward > boundaries. > > > On Sun, Nov 12, 2023 at 6:22 AM Eric Leclerc <ejr.lecl...@gmail.com> > wrote: > >> Hello every one >> >> I have the same request for a group of students, finally do you find >> these ward boundaries pre-2011 ? >> >> Best regards, Eric >> >> Le dimanche 15 octobre 2023 à 07:47:20 UTC+2, gulaba...@gmail.com a >> écrit : >> >>> Hi All, >>> Does anyone have access to pre-2011 GCC ward boundaries? I am trying to >>> find them to map it to some Census data but can't find any source. The data >>> meet GitHub and OpenCity have post-2011 delimitation boundaries which don't >>> work for this purpose. Even PDFs or images that can be georeferenced work >>> too. >>> >>> Appreciate any help! >>> Thanks, >>> Herry >>> >> >> -- >> 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 datameet+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/datameet/6b2b7d85-9ca3-49cc-82dd-23045cabea9an%40googlegroups.com >> <https://groups.google.com/d/msgid/datameet/6b2b7d85-9ca3-49cc-82dd-23045cabea9an%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > -- > 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/GvLBHR2QIiA/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > datameet+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/datameet/CA%2BGKQr3ShUgVgwU2Mc%2B2gXkCp-2iOkprD26r86Bjbx1McyMMkA%40mail.gmail.com > <https://groups.google.com/d/msgid/datameet/CA%2BGKQr3ShUgVgwU2Mc%2B2gXkCp-2iOkprD26r86Bjbx1McyMMkA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > 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 datameet+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/datameet/94B3248A-6E58-41DF-B9CC-F8A350356441%40gmail.com > <https://groups.google.com/d/msgid/datameet/94B3248A-6E58-41DF-B9CC-F8A350356441%40gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 datameet+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/datameet/CA%2BGKQr0_6gqpNQHSEViKOXZr1g-ZNSDoNkbM5bb0d2L5e-QgXg%40mail.gmail.com.
