[PROJ] Indian foot

Javier Jimenez Shaw j1 at jimenezshaw.com
Thu Sep 3 23:24:27 PDT 2020


Hi Pierre

There are 4 "different" Indian feet in PROJ, taken from the EPSG I guess:
https://beta.epsg.org/search/by-name?searchedTerms=indian+foot  (select the
"Units" tab. Click on "More" if you do not see it)
The foot you mention [0.30479841] is "Indian foot (1937)"
The other three are:
  Indian foot: 0.30479951024814694
  Indian foot (1962): 0.3047996
  Indian foot (1975): 0.3047995

Looking at the source code I see that the "Indian foot (1937)" is also
defined in ISO-19111

Cheers

.___ ._ ..._ .. . ._.  .___ .. __ . _. . __..  ... .... ._ .__
Entre dos pensamientos racionales
hay infinitos pensamientos irracionales.



On Fri, 4 Sep 2020 at 07:02, Pierre Abbat <phma at bezitopo.org> wrote:

> PROJ disagrees with Bezitopo and PerfectTIN on the length of an Indian
> foot.
> PROJ says it's 0.30479841 m; PerfectTIN says it's 0.3047996 m. I got this
> figure from Wikipedia. Where did you get that one from?
>
> Pierre
> --
> Jews use a lunisolar calendar; Muslims use a solely lunar calendar.
>
>
>
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