1. A computer-implemented method comprising: identifying, by a computing system, a set of regions corresponding to a geographical area; determining, by the computing system, based at least in part on a collection of training images, metrics for a plurality of object categories associated with each region in the set of regions; and developing, by the computing system, a neural network based at least in part on the metrics for the plurality of object categories associated with at least one region in the set of regions and on the collection of training images.