TL;DRI would like to see ores count as belonging to the same patch (especially when using circuit connections with miners set to "Entire ore patch", but also in some situations when hovering on the map) whenever they are near each other; not just when they're directly connected.
What ?Here is a current image of a coal patch as seen on the map
All 68k of that coal is being counted in the map hover, but if you see those two small white bits below the main patch, those aren't being counted in my miners set to "Read resources" and "Entire ore patch". Here you can see that my wire is only reading 63k of ore.
In the current setup, I actually have to wire up two more wires to get all of the patch counted (in other words, the miners think these are three separate ore patches).
Related, sometimes what used to be a single patch will be mined out in a certain way as to appear as separate patches even on the map, as you can see in these two images below