Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-21 Thread Giuseppe Aruta
No problem Nicolas, There are still so many features I discover on OJ. Sorry for my short sintetic answer due to lack of PC in this moment. Not sure if I already integrated the source code of measure plugin into OJ svn. When I worked on that plugin I tried to detailed the origin of the algorithms,

Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-21 Thread Nicolas Ribot
Hi Giuseppe, Yes exactly what I needed ! Thanks, I was about reinventing the wheel ;) (so many features I don't know of in OJ...) Nicolas On Thu, 21 Feb 2019 at 17:42, Giuseppe Aruta wrote: > There is also a plugin already integrated into OJ that can measure > distance/ area in lat/lon. (Epsg

Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-21 Thread Giuseppe Aruta
There is also a plugin already integrated into OJ that can measure distance/ area in lat/lon. (Epsg 4326). See Measure toolbox under Plugin menu. Il mer 20 feb 2019, 15:55 Paul J. Morris ha scritto: > On Wed, 20 Feb 2019 10:20:14 +0100 > Nicolas Ribot wrote: > > > Hi, > > > > > > > > Sounds us

Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-20 Thread Paul J. Morris
On Wed, 20 Feb 2019 10:20:14 +0100 Nicolas Ribot wrote: > Hi, > > > > > Sounds useful to me. But i am not sure its so easy given that the > > length of a degree is changing, but there may be some formulas out > > there (even web pages) that calculate great circle distances ... > > mhm... i think

Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-20 Thread Nicolas Ribot
Hi, > > Sounds useful to me. But i am not sure its so easy given that the length > of a degree is changing, but there may be some formulas out there (even web > pages) that calculate great circle distances ... mhm... i think somewhere i > even used such, once. > > Cheers, > Stefan > > Yes, it is b

Re: [JPP-Devel] Metric distances for lat long coordinates

2019-02-19 Thread Stefan Steiniger
Hi, Sounds useful to me. But i am not sure its so easy given that the length of a degree is changing, but there may be some formulas out there (even web pages) that calculate great circle distances ... mhm... i think somewhere i even used such, once. Cheers, Stefan On Tue, Feb 19, 2019, 15:49 Ni