March 13th 2017

When I established the forums in 2005 it was to offer a more richer web experience and greater functionality than the platform where we started this social adventure in 2003, Yahoo Groups. The forums were once a busy hive of activity and provided locals and visitors with a wealth of information just like the Geocaching Ireland Discussion Group on Facebook today.

It was a time where we didn't have the many social media platforms we have today, and it was a different time in terms of mobility and technology. There was no instant access to information, no Google Maps and a very limited base map on your GPSr. Mobile connectivity for me was a 9600bps Infrared connection from a Nokia to a laptop and in later times to a PDA using WAP.

As we moved into the social media era so did our forums users. Geocaching Ireland moved there too, and we have a thriving community on the Geocaching Ireland Discussion Group on Facebook. As a result, forum activity isn't what it used to be and I have taken the decision to disable new registrations to the forums and to make the forums read only so any information there can still be accessed.

The discussion hasn't ended, it has just moved. Join us on the Facebook Geocaching Ireland Discussion Group .

Donnacha

three points and distances

Got a problem you can't solve? If it's your PC, GPS or iPOD, post it here and we'll help out if we can

Moderator: GCI Admins

Post Reply
mr.-oda
Lugnaquillia 925m
Lugnaquillia 925m
Posts: 243
Joined: Mon Jan 02, 2012 5:57 pm
Location: Callan, Co. Kilkenny

three points and distances

Post by mr.-oda » Thu May 01, 2014 7:06 am

Hi, I would hear if anyone knows a clever program which could help me.
I have three sets of coordinates and I need to draw three circles with varying radius and then see where they intersect.
Image

User avatar
SaaX
Great Sugarloaf 501m
Great Sugarloaf 501m
Posts: 42
Joined: Tue Jan 15, 2008 9:13 am
Location: Kinvara, Co. Galway

Re: three points and distances

Post by SaaX » Thu May 01, 2014 10:25 am

That challenge sounds familiar ;-) I found an Android App at the time: "Geocaching Multi-Tool - GeoMT". It should do the job - if you have an Android phone that is... If not I can to the calculation for you if you like.

Cheers,
Axel

User avatar
SaaX
Great Sugarloaf 501m
Great Sugarloaf 501m
Posts: 42
Joined: Tue Jan 15, 2008 9:13 am
Location: Kinvara, Co. Galway

Re: three points and distances

Post by SaaX » Thu May 01, 2014 10:30 am

Oh, and what I forgot to say: it's €0.99 and the function is called "circle triangulation". This works with two waypoints and two circles with individual raduis - which will give you two intersections. You can hopefully eliminate one ;-)

Edit: just googled a bit - this is a web-based option and free: http://www.gpsvisualizer.com/examples/range_rings.html

Good luck!
Axel

mr.-oda
Lugnaquillia 925m
Lugnaquillia 925m
Posts: 243
Joined: Mon Jan 02, 2012 5:57 pm
Location: Callan, Co. Kilkenny

Re: three points and distances

Post by mr.-oda » Fri May 02, 2014 10:39 am

thanks
Image

User avatar
Fjon
Carrauntoohil 1039m
Carrauntoohil 1039m
Posts: 1873
Joined: Mon Jan 31, 2005 8:19 pm
Location: Dublin 18

Re: three points and distances

Post by Fjon » Sat May 03, 2014 2:04 pm

If you have a Garmin, Mapsource also does this, but it is a bit more cumbersome.

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests