METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR IDENTIFYING BUILDING ACCESSORS

Provided herein is a method for establishing accessors to a building from probe data. Methods may include: receiving probe data points; determining probe data point candidates for a first edge of a building; determining, for the probe data point candidates, probe data points entering or exiting the building; generating, from the probe data points entering or exiting the building, a probe density histogram for the first edge of the building, where the probe density histogram represents a volume of probe data points at each of a plurality of positions across a width of the first edge of the building; applying a deconvolution method to the probe density histogram to obtain a multi-modal histogram; determining, from the multi-modal histogram, a number of statistically significant peaks, where each statistically significant peak represents an accessor to the building in the first edge of the building; and providing data for navigational assistance based on the computed accessors to the building.