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Sometimes it is impossible to narrow the banding or recovery location to a single 10-minute block. Inexact coordinate codes have been adopted to indicate when this is the case.
###-###7 If a county is given for a location, the coordinates of the geographical center of the county are used and the last digit of the longitude is replaced with a "7". For example, Talbot County, Maryland, 384-0760, would become 384-0767.
##8-###8 In some instances, it is not possible to narrow the location to a ten-minute block, a county, or a single 1-degree block. For example, the hunter merely states that he killed the bird in "Chesapeake Bay, Maryland" and fails to respond to subsequent requests for a more specific location. In these cases the intersection of the latitude and longitude lines nearest the southeast corner of "Chesapeake Bay" would be determined. If, for example, these coordinates were 370-0760, the last digits of both latitude and longitude would be replaced by the numeral "8". In this instance, the approximated coordinates would read 378-0768.
##9-###9 When it is possible to determine that the location is contained within a single 1-degree block, the last digit of both latitude and longitude would be replaced with the numeral "9". For example, a hunter may indicate only that he shot a bird on Nezpique Bayou, Louisiana. This bayou extends into several degree blocks and several parishes but is contained within a single 1-degree block. The coordinates of the southeast corner of the degree block that contains Nezpique Bayou are 300-0920. The inexact coordinates would read 309-0929.
