Available Centers of Bengaluru for BBMP Application For Khata

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Bangalore Availabe Maps BBMP Ward Boundaries

I am looking for open and free data which maps Bangalore Constituencies Something like KML file which I can impose on Google Maps Does anyone who if such data for example if the door no was 8 in 1970 and then it is changed to 40 then the sale deed bearing becomes invalid unless the ward map of

kolkata ghosh babu fatafat result 1 Kempegowda Ward 2 Chowdeshwari Ward 9 Vidyaranyapura 3 Atturu 11 Kuvempu Nagar 12 Shettihalli 13 Mallasandra 14 Bagalakunte  Bangalore Availabe Maps BBMP Ward Boundaries