GTMATCH does the matching in GeoTAX. It takes the house number, street name, pre- and post-directionals, city, state, and ZIP Code and matches them against street segment data in the database. Based on the settings you provide, it calculates the address's location on the correct side of the street, offset by 0, 20, 40, or 60 feet (the default value is 40 feet). GTMATCH returns geographic information associated with that address, including:
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State, county, census tract, and block group codes
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State abbreviation and county name
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MCD code and name
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CBSA code and name
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Place code and place attributes
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SPD, IPD, and PAY codes, if available
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Latitude/longitude coordinates
GTMATCH calls the cross-reference function GTX20 to obtain the GeoTAX key for Sovos. The following figure illustrates how this function works with your driver program.
