There are many such physical markers, in various states of disrepair. See articles like: https://www.deccanherald.com/content/555826/cubbon-roads-19th-century-stone.html
https://www.thehindu.com/news/national/other-states/kolkatas-great-trigonometrical-survey-link-of-trigonometry-and-towers/article21616151.ece https://www.deccanchronicle.com/140821/lifestyle-offbeat/article/gps-we-had-gts Regards, Devdatta On Thu, Aug 8, 2019 at 5:42 PM Thejesh GN <i...@thejeshgn.com> wrote: > > On Thu, 8 Aug, 2019, 4:44 PM Arun Ganesh, <arungra...@gmail.com> wrote: > >> >> >> On Thu, Aug 8, 2019 at 8:20 AM Thejesh GN <i...@thejeshgn.com> wrote: >> >>> Are there things similar to NGS Survey Marks in India? >>> >>> >>> https://www.ngs.noaa.gov/datasheets/ >>> >>> https://en.m.wikipedia.org/wiki/Survey_marker >>> >>> *Survey markers*, also called *survey marks*, *survey monuments*, *survey >>> benchmarks* or *geodetic marks*, are objects placed to mark key survey >>> <https://en.m.wikipedia.org/wiki/Surveying> points on the Earth's >>> surface. They are used in geodetic >>> <https://en.m.wikipedia.org/wiki/Geodesy> and land surveying >>> <https://en.m.wikipedia.org/wiki/Surveying>. Informally, such marks are >>> referred to as benchmarks >>> <https://en.m.wikipedia.org/wiki/Benchmark_%28surveying%29>,[1] >>> <https://en.m.wikipedia.org/wiki/Survey_marker#cite_note-1> although >>> strictly speaking the term "benchmark" is reserved for marks that indicate >>> elevation. Horizontal position markers used for triangulation >>> <https://en.m.wikipedia.org/wiki/Triangulation> are also known as >>> triangulation >>> stations <https://en.m.wikipedia.org/wiki/Triangulation_station>. >>> >>> >>> >> Yes there are. Survey of India maps have these locations marked with a >> label 'BM' followed by the elevation. >> You can find them in these collection of old toposheets: >> https://zenodo.org/communities/surveyofindia/search?page=1&size=20 >> >> >>> > Are there any physical marks in real world? Have you seen it? > > Also is there simple file with these points. Else I will have to go > through each and make a list. > > > > > >>> >>> Regards, >>> Thej >>> >>> Thejesh GN ⏚ ತೇಜೇಶ್ ಜಿ.ಎನ್ >>> http://thejeshgn.com >>> >>> -- >>> 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/CAABnYsWk%2BB1DiFUnBUi%3DoUD4LQrHYBMgqrVU4jA2SnhciCCeFg%40mail.gmail.com >>> <https://groups.google.com/d/msgid/datameet/CAABnYsWk%2BB1DiFUnBUi%3DoUD4LQrHYBMgqrVU4jA2SnhciCCeFg%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/CA%2BGKQr34uYDU-UA_0Ch4k8Lz7okANGs7fsGonAM1_zU44fBeyw%40mail.gmail.com >> <https://groups.google.com/d/msgid/datameet/CA%2BGKQr34uYDU-UA_0Ch4k8Lz7okANGs7fsGonAM1_zU44fBeyw%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/CAABnYsUAAKsnkj3FEgHZMY2-ZoZhiEP3jWahfBZgZhAGhd0NWA%40mail.gmail.com > <https://groups.google.com/d/msgid/datameet/CAABnYsUAAKsnkj3FEgHZMY2-ZoZhiEP3jWahfBZgZhAGhd0NWA%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/CAOQOUMsAX%2B0y%2BiYqWcYBF0%2BcdZ3Gfe0_o%3DotYxXoA%2By60GcUxQ%40mail.gmail.com.
