[OpenLayers-Users] Draw a line knowing its length in meters e it's angle

[mail.roliveira at gmail.com]

Thanks Phil,

I understand the spherical issue. The biggest length I will be using is arround 60km, but on average arround 20Km. I haven't discussed, with my team, the precision issue, but as long has it stays within +- 200m I'd say it is ok. From you opinion do you think it is a reasonable error?


I also haven't decided if I will use the formulas that WALLY ATKINS kindly presented despite the fact that they are very interesting in deed.


Could you please explain what you mean by:


«watch of line that crosses the 180»?
What is the 180?




Thanks
Ruben

Sent from Alto - altomail.com


From: p.scadden at gns.cri.nz<p.scadden at gns.cri.nz>
To: <openlayers-users at lists.osgeo.org>
Sent: Monday, June 3, 2013
Subject: Re: [OpenLayers-Users] Draw a line knowing its length in meters e it's angle

Just be aware that this approach have a  couple of limitations:
  - watch of line that crosses the 180
  - it based on spherical earth and will be increasingly inaccurate as 
dist get large.

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