Average G25 coordinates
Paste multiple Global25 coordinate rows and get a precise, copy-ready coordinate-wise average — for building population averages or combining samples. Runs entirely in your browser.
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What a coordinate average is, and when it is honest
Averaging Global25 rows means taking the arithmetic mean of each of the 25 dimensions independently: the first number of the result is the mean of every input's first number, and so on. That is how a population average is built from its member individuals, and it is why a population coordinate is a summary of people rather than a person. This tool does that in your browser and gives you a copy-ready row.
The reason to do it is that individuals scatter. One sample from a group can sit well away from where that group actually centres, so distances measured against a single individual carry that individual's noise as if it were the group's position. Averaging several members pulls the point toward the centre and makes the coordinate more stable to compare against.
The limit is that a mean is only meaningful when the inputs belong together. Average two genuinely distinct groups and you get a coordinate describing a population that never existed, sitting in the empty space between them — and it will still return confident-looking distances to everything. The arithmetic cannot tell you whether your inputs form one group; only knowing where the samples came from can. Averaging a handful of individuals from one site and period is sound; averaging by a shared label that spans centuries or regions usually is not.