A computer-implemented method to resolve an inconsistency in road closure data stored in a mapping platform, comprising: processing map data to generate a roadway graph representing a spatial relationship between a first road segment and a second road segment, wherein the first road segment has a first closure state, the second road segment has a second closure state, wherein the first and second closure states are stored in the road closure data and indicate whether the respective road segment is closed or open, wherein the spatial relationship indicates that the first closure state of the first road segment cannot differ from the second closure state of the second road segment; determining, from the roadway graph and the road closure data, that the inconsistency in the road closure data for the first road segment and the second road segment exists by determining that the first closure state and the second closure state differ, thereby being inconsistent with the spatial relationship, wherein the existence of the inconsistency is based on determining that: the roadway graph indicates that the second road segment is an incoming road segment that flows into the first road segment, the first road closure state is open, the second road closure state is closed, and any other incoming road segments flowing into the first road segment are closed; or the roadway graph indicates that the second road segment is an outgoing road segment that flows from the first road segment, the first road closure state is open, the second road closure state is closed, and any other outgoing road segments flowing from the first road segment are closed; and in response to the determined existence of the inconsistency in the road closure data, changing the road closure data stored in the mapping platform either to match the first road closure state with the second road closure state, or to match the second road closure state with the first road closure state, so that the first and second road closure states no longer differ. processing map data to generate a roadway graph representing a spatial relationship between a first road segment and a second road segment, wherein the first road segment has a first closure state, the second road segment has a second closure state, wherein the first and second closure states are stored in the road closure data and indicate whether the respective road segment is closed or open, wherein the spatial relationship indicates that the first closure state of the first road segment cannot differ from the second closure state of the second road segment; determining, from the roadway graph and the road closure data, that the inconsistency in the road closure data for the first road segment and the second road segment exists by determining that the first closure state and the second closure state differ, thereby being inconsistent with the spatial relationship, wherein the existence of the inconsistency is based on determining that: the roadway graph indicates that the second road segment is an incoming road segment that flows into the first road segment, the first road closure state is open, the second road closure state is closed, and any other incoming road segments flowing into the first road segment are closed; or the roadway graph indicates that the second road segment is an outgoing road segment that flows from the first road segment, the first road closure state is open, the second road closure state is closed, and any other outgoing road segments flowing from the first road segment are closed; and in response to the determined existence of the inconsistency in the road closure data, changing the road closure data stored in the mapping platform either to match the first road closure state with the second road closure state, or to match the second road closure state with the first road closure state, so that the first and second road closure states no longer differ. the roadway graph indicates that the second road segment is an incoming road segment that flows into the first road segment, the first road closure state is open, the second road closure state is closed, and any other incoming road segments flowing into the first road segment are closed; or the roadway graph indicates that the second road segment is an outgoing road segment that flows from the first road segment, the first road closure state is open, the second road closure state is closed, and any other outgoing road segments flowing from the first road segment are closed; and in response to the determined existence of the inconsistency in the road closure data, changing the road closure data stored in the mapping platform either to match the first road closure state with the second road closure state, or to match the second road closure state with the first road closure state, so that the first and second road closure states no longer differ.