figure8LoopAdd 0 0 400 499 Dialog radius (m) -999999999.000000000000000 9999999999.000000000000000 centre easting 2 (m) Qt::Horizontal Qt::Horizontal <html><head/><body>Radius of the loop</body></html> 0.100000000000000 600.000000000000000 50.000000000000000 Qt::Horizontal QDialogButtonBox::Cancel|QDialogButtonBox::Ok Qt::Horizontal Qt::Horizontal height (m) current flow in loop 1 centre easting 1 (m) 1 100000 <html><head/><body>Akvo uses a positive down convention, a slight negative value to the loop height improves numerical stability using digital filtering hankel transforms. </body></html> 3 -99.000000000000000 -0.001000000000000 centre northing 2 (m) Qt::Horizontal -9999999999.000000000000000 9999999999.000000000000000 segments centre northing 1 (m) <html><head/><body>Currently Akvo/Merlin calculates circular loops using segments of wire, forming a polygon. Analytic circular loops may be added in the future. </body></html> 5 200 15 clockwise anti-clockwise -9999999999.000000000000000 99999999999.000000000000000 -99999999.000000000000000 99999999.989999994635582 turns buttonBox accepted() figure8LoopAdd accept() 248 254 157 274 buttonBox rejected() figure8LoopAdd reject() 316 260 286 274