Systems and methods for obtaining and using information from map images

1. A non-transitory computer-readable storage medium carrying one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus to at least perform the following:

causing, at least in part, a rendering of an image of a region of a metric vector space in a map image;

determining, within the map image of the region of the metric vector space, a pixel extent containing one or more sets of contiguous pixels having a text color, wherein the pixel extent comprises a raster label extract (RLE);

determining a confidence score for each RLE representing a likelihood that the pixel extent actually contains a textual annotation;

causing, at least in part, a generation of a text string for each RLE based on the pixel extent, a detection of a user input entering the text string based on the pixel extent, or a combination thereof;

causing to display, on a user interface, a list of RLEs with the corresponding confidence score and an associated image of the RLE, a set of extraction state controls for each RLE, wherein a extraction state control for each RLE displays information about the RLE; and

causing, at least in part, a change to a state of the RLE through detection of a user input modifying a state associated with the pixel extent via the user interface, wherein the modifying the state includes at least one of entering a new text string, correcting the incorrect text string, validating the correct text string, or a combination thereof.

2. The non-transitory computer-readable storage medium of claim 1 , wherein determining the confidence score is based, at least in part, on determining a width, a height, or a combination thereof of the pixel extent.

3. The non-transitory computer-readable storage medium of claim 2 , wherein the pixel extent and the text string are stored in at least one of a gazetteer database and a searchable location-related database.

4. The non-transitory computer-readable storage medium of claim 1 , wherein the apparatus is caused, at least in part, to further perform:

causing, at least in part, a detection of a user input modifying the confidence score corresponding to the pixel extent; and

causing, at least in part, a rendering of the confidence score corresponding to the pixel extent.

5. The non-transitory computer-readable storage medium of claim 1 , wherein the apparatus is caused, at least in part, to further perform:

determining coordinates for a location in the metric vector space depicted by the map image and associated with the pixel extent.

6. The non-transitory computer-readable storage medium of claim 5 , wherein the apparatus is caused, at least in part, to further perform:

causing, at least in part, a storing of the pixel extent and the coordinates.

7. The non-transitory computer-readable storage medium of claim 6 , wherein the pixel extent and the coordinates are stored in at least one of a gazetteer database and a searchable location-related database.

8. The non-transitory computer-readable storage medium of claim 1 , wherein the map image of the region comprises a scanned paper map and the textual annotation indicates information relating to a location of the textual annotation on the scanned paper map.

9. A method comprising:

causing, at least in part, a rendering of an image of a region of a metric vector space in a map image;

determining, within the map image of the region of the metric vector space, a pixel extent containing one or more sets of contiguous pixels having a text color, wherein the pixel extent comprises a raster label extract (RLE);

determining a confidence score for each RLE representing a likelihood that the pixel extent actually contains a textual annotation;

causing, at least in part, a generation of a text string for each RLE based on the pixel extent, a detection of a user input entering the text string based on the pixel extent, or a combination thereof;

causing to display, on a user interface, a list of RLEs with the corresponding confidence score and an associated image of the RLE, a set of extraction state controls for each RLE, wherein a extraction state control for each RLE displays information about the RLE; and

causing, at least in part, a change to a state of the RLE through detection of a user input modifying a state associated with the pixel extent via the user interface, wherein the modifying the state includes at least one of entering a new text string, correcting the incorrect text string, validating the correct text string, or a combination thereof.

10. The method of claim 9 , wherein determining the confidence score is based, at least in part, on determining a width, a height, or a combination thereof of the pixel extent.

11. The method of claim 10 , wherein the pixel extent and the text string are stored in at least one of a gazetteer database and a searchable location-related database.

12. The method of claim 9 , further comprising:

causing, at least in part, a detection of a user input modifying the confidence score corresponding to the pixel extent; and

causing, at least in part, a rendering of the confidence score corresponding to the pixel extent.

13. The method of claim 9 , further comprising causing, at least in part, an obtaining of coordinates for a location in the metric vector space depicted by the map image and associated with the pixel extent.

14. The method of claim 13 , further comprising causing, at least in part, a storing of the pixel extent and the coordinates.

15. The method of claim 14 , wherein the pixel extent and the coordinates are stored in at least one of a gazetteer database and a searchable location-related database.

16. The method of claim 9 , wherein the map image of the region comprises a scanned paper map and the textual annotation indicates information relating to a location of the textual annotation on the scanned paper map.