Stitching mixed-version map tiles in hybrid navigation for partial map updates

An apparatus comprising at least one processor and at least one memory storing (a) computer program code and (b) a first tile and a second tile of a digital map, the at least one memory and the computer program code configured to, with the processor, cause the apparatus to at least:

• receive a map update for at least the first tile comprising map update data, the map update comprising updated map data for the first tile corresponding to a present version of the map data and an old change set, the old change set consists of previous map data for the first tile corresponding to one or more changed or new links intersected by a tile boundary between the first tile and the second tile, the previous map data corresponding to a previous version of the map data;
• determine a map region of interest, the map region of interest comprising at least a portion of the first tile;
• determine that the map region of interest comprises at least a portion of the second tile;
• in response to determining that the map region of interest comprises the at least a portion of the second tile, determine whether a map update for the second tile corresponding to the present version of the map data has been received;
• responsive to determining that the map update for the second tile corresponding to the present version of the map data has been received, at least one of (a) not use the previous map data for the first tile when performing a navigation function corresponding to the map region of interest or (b) not display the previous map data for the first tile for the one or more changed or new links intersected by the tile boundary when displaying the map region of interest via a user interface of the apparatus;
• and
• responsive to determining that the map update for the second tile corresponding to the present version of the map data has not been received, at least one of (a) use the previous map data for the first tile when performing a navigation function corresponding to the map region of interest or (b) display the previous map data for the first tile for the one or more changed or new links intersected by the tile boundary when displaying the map region of interest via the user interface of the apparatus.

A computer program product comprising at least one non-transitory computer-readable storage medium having computer-executable program code instructions stored therein, the computer-executable program code instructions comprising program code instructions configured to:

• receive a map update for at least a first tile comprising map update data, the map update comprising updated map data for the first tile corresponding to a present version of the map data and an old change set, the old change set consists of previous map data for the first tile corresponding to one or more changed or new links intersected by a tile boundary between the first tile and a second tile, the previous map data corresponding to a previous version of the map data;
• determine a map region of interest, the map region of interest comprising at least a portion of the first tile;
• determine that the map region of interest comprises at least a portion of the second tile;
• in response to determining that the map region of interest comprises the at least a portion of the second tile, determine whether a map update for the second tile corresponding to the present version of the map data has been received;
• responsive to determining that the map update for the second tile corresponding to the present version of the map data has been received, at least one of (a) not use the previous map data for the first tile when performing a navigation function corresponding to the map region of interest or (b) not display the previous map data for the first tile for the one or more changed or new links intersected by the tile boundary when displaying the map region of interest via a user interface of a user apparatus;
• and
• responsive to determining that the map update for the second tile corresponding to the present version of the map data has not been received, at least one of (a) use the previous map data for the first tile when performing a navigation function corresponding to the map region of interest or (b) display the previous map data for the first tile for the one or more changed or new links intersected by the tile boundary when displaying the map region of interest via the user interface of the user apparatus.