# Compute mean coordinates

Can anybody explain how to compute mean coordinates?

• please clarify your question. What exactly are you try to do and what tools are you using? Jul 24, 2012 at 5:50
• I am using the analysis tool whose name is mean coordinate. Jul 24, 2012 at 12:42
• What software are you using? Jul 24, 2012 at 12:51
• I am using Quantum GIS. Jul 24, 2012 at 13:08
• This question describes how to compute mean coordinates in QGIS: gis.stackexchange.com/questions/29181/mean-coordinates-in-qgis. Is that what you're looking for? Jul 24, 2012 at 16:04

The same way you calculate any mean from a set of numbers. The sum of the numbers divided by the count

``````Mean x = (X1 + X2 + X3....XN)/N
Mean Y = (Y1 + Y2 + Y3....YN)/N
``````
• I suppose there should be another possibilities, arithmetic mean is only relevant for planar coordinates.
– user5332
Jul 24, 2012 at 9:21
• True, although with the lack of information in the question I just assumed planar. Jul 24, 2012 at 9:41
• You are right. AFAIC, doing it on the sphere and/or on the ellipse (I think of WGS84) are also relevant. I also think of Delaunay Triangles, Voronoï Diagrams and the more involved computations implied.
– user5332
Jul 24, 2012 at 10:18
• Thanks for the response! In WGS 84 are the same calculations?? Is correct to do this in every coordinate system or projection? Jul 24, 2012 at 12:37