You don't. You can't, really. You just let synth collect things into geo-locations to speed up the sorting process. You still have to manually sort all image

You don't. You can't, really. You just let synth collect things into geo-locations to speed up the sorting process. You still have to manually sort all images that overlay a 'point of interest'. But the real boon is that you can quickly, intuitively and effectively do that sort. And if you see a 'person of interest' you can 'walk' down a possible path and sort the images at intermediate points to see if you can establish a route or potentially see them from other angles.