Reverse geocoding

Supported reverse geocoding for countries that support updated geocoding.

For most countries, Verisk Synergy Studio performs point-in-polygon1 at the highest resolution for which Verisk Synergy Studio has boundary data. If Verisk Synergy Studio does not find a containing boundary for the input geocode, Verisk Synergy Studio uses nearest neighbor2 to find the closest of the boundaries with a 2 km tolerance. This tolerance accounts for the smoothing of borders and coastlines, as well as inland bodies of water that may be omitted from some shapes.

For United Kingdom and Israel postal codes, Verisk Synergy Studio does not use boundary data and, instead, uses available postal centroid data. In this case, Verisk Synergy Studio provides postal areas as points instead of shapes for reverse geocoding. Therefore, Verisk Synergy Studio begins and ends by using the nearest neighbor analysis on the postal centroids. In these cases, Verisk Synergy Studio expects more distance tolerance for points. Consequently, the tolerance is larger than that used for the boundary data and varies per country.

In either case, if Verisk Synergy Studio does not find a match, Verisk Synergy Studio proceeds to attempt to forward geocode using any other input area information that you have provided.

1 An algorithm that uses spatial geography to determine the boundary within which a given geocode falls
2 An algorithm that uses spatial geography to determine which boundary or point is closest to a given geocode