Eva and Claire walked towards town hall, which was located at the exact center of the settlement. Almost all of the settlements they had come to were laid out similarly. In some cases, they were the exact same.
For the most part, the town hall was in the center simply because that’s what every settlement had built first. Everything else was assembled around it, no doubt based on standardized layouts that their building printers came pre-programmed with.
Almost all town halls themselves were the exact same design, and so the Ravens learned to spot them on sight.
Eva supposed it was the best performing design. Or at the very least, the default blueprint that was good enough so no-one bothered to modify it.