Hi List, I'm forwarding our correspondence with Vaclav, maybe someone could have any thoughts. In the situation presented on the screenshots, there was three bearings building a triang. Then adding the fourth bearing (the point on the nord) doesn't change the polygon geometry, but moves the location as it's computed as a center of gravity. For me it's the best solution, but maybe anyone have better ideas?
B.
--- Begin Message ---Dnia czwartek 26 sierpnia 2010 o 22:24:23 Václav Řehák napisał(a): > Hi, > > I tried to modify your test data by adding a new bearing to the subset > (fix id) 5 using "Add feature" button in QGIS and expected the result > area to change from a triangle to square but it did not happen. It > looks like my line is drawn OK but is not included in the area > computation. Please see attached data. Do you know what's wrong? Look at the screenshot. The area is computed as a convex hull, and the location is computed as a center of gravity. The red location is computed using the 4 bearings, while the green one is computed from the old 3 bearings. Also in the attribute table of the compuyed location there's n=5, what is a number of used intersections. So all is ok, but maybe the algorithm is not the best solution. Do you have a better idea? B.<<attachment: trian.jpeg>>
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