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Methods, systems, and apparatus, including computer programs encoded on computer storage media, are described for automatically and/or interactively editing image metadata. In one aspect, the methods include the actions of obtaining two from among three items of geo-metadata associated with an image

Methods, systems, and apparatus, including computer programs encoded on computer storage media, are described for automatically and/or interactively editing image metadata. In one aspect, the methods include the actions of obtaining two from among three items of geo-metadata associated with an image. The three items of geo-metadata include an acquisition geo-location for the image, an acquisition geo-orientation for the image and a geo-location of a subject depicted in the image. The methods further include the actions of representing on a map the two obtained items of geo-metadata associated with the image, and determining candidates for the third item of geo-metadata based on the representations of the two obtained items of geo-metadata. In addition, the methods can also include the actions of determining the third item of geo-metadata associated with the image from among the generated candidates.

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1. A method performed by one or more processes executing on a computer system, the method comprising: obtaining, from geo-metadata associated with an image, an acquisition geo-location for the image and, an acquisition geo-orientation for the image;representing on a map the acquisition geo-location

1. A method performed by one or more processes executing on a computer system, the method comprising: obtaining, from geo-metadata associated with an image, an acquisition geo-location for the image and, an acquisition geo-orientation for the image;representing on a map the acquisition geo-location and the acquisition geo-orientation;identifying one or more objects based, at least in part, on the acquisition geo-location and the acquisition geo-orientation, wherein the one or more objects represent one or more candidates of a subject depicted in the image;determining, for each of the one or more candidates, a distance between a focus point of the image and a geo-location associated with each of the one or more candidates;identifying, based on the determining, a primary candidate, the primary candidate positioned at the distance nearest the focus point;identifying the primary candidate as the subject of the image; andrepresenting the subject on the map. 2. The method of claim 1, further comprising: overlaying on the map a vector having an origin at the obtained acquisition geo-location and a direction corresponding to the obtained acquisition geo-orientation; andidentifying the one or more candidates positioned along the direction of the vector based on geo-information including polygonal contours corresponding to the one or more candidates. 3. The method of claim 2, wherein identifying the primary candidate as the subject of the image comprises: determining which of the one or more identified candidates is the subject based on a user selection. 4. The method of claim 2, wherein identifying the primary candidate as the subject of the image comprises: selecting a candidate from among the one or more identified candidates that is located within a specified range of the acquisition geo-location. 5. The method of claim 2, further comprising tagging the image in accordance with hierarchical geo-location information associated with the determined subject. 6. The method of claim 2, further comprising generating metadata for a focus distance, wherein the focus distance is substantially equal to a length of the overlaid vector representing the acquisition geo-orientation. 7. The method of claim 2, wherein identifying the one or more candidates positioned along the direction of the vector further comprises: receiving a user request to identify an object depicted in the image along the direction of the vector;extending, in response to the received user request, a length of the vector; andidentifying the object upon the extended vector reaching a polygonal contour of the object. 8. The method of claim 7, wherein reaching the polygonal contour occurs when the extended vector is separated from the polygonal contour by less than a predetermined distance. 9. The method of claim 2, where the image comprises a frame included in a sequence of video frames, and the method further comprises associating the subject with the sequence of video frames. 10. The method of claim 9, further comprising: obtaining an acquisition geo-location and an acquisition geo-orientation of an other frame of the sequence of video frames;representing on the map the obtained acquisition geo-location and geo-orientation of the other frame, at least in part, by overlaying on the map an other vector having an origin at the obtained acquisition geo-location of the other frame and a direction corresponding to the obtained acquisition geo-orientation of the other frame;identifying along the direction of the other vector one or more other candidates of a subject depicted in the image based, at least in part, on geo-information including polygonal contours corresponding to the one or more other candidates;determining, for each of the one or more other candidates, a distance between a focus point of the image and a geo-location associated with each of the one or more other candidates;identifying, based on the determining, an other primary candidate, the other primary candidate positioned at the distance nearest the focus point;identifying the other primary candidate as the subject of the other frame; andassociating the subject of the other frame with the sequence of video frames. 11. A non-transitory computer readable medium encoded with a computer program, the program comprising instructions that when executed by a data processing apparatus cause the data processing apparatus to: obtain from geo-metadata associated with an image, an acquisition geo-location for the image and an acquisition geo-orientation for the image;represent on a map the acquisition geo-location and the acquisition geo-orientation;determine one or more objects based, at least in part, on the acquisition geo-location and the acquisition geo-orientation, wherein the one or more objects represent one or more candidates of a subject depicted in the image;determine, for each of the one or more candidates, a distance between a focus point of the image and a geo-location associated with each of the one or more candidates;identify, based on the determination, a primary candidate, the primary candidate positioned at the distance nearest the focus point;identify the primary candidate as the subject of the image; andrepresent the subject on the map. 12. The non-transitory computer readable medium of claim 11, wherein the instructions to cause the data processing apparatus to represent on a map the acquisition geo-location and the acquisition geo-orientation comprise instructions to cause the data processing apparatus to: overlay on the map a vector having an origin at the obtained acquisition geo-location and a direction corresponding to the obtained acquisition geo-orientation, andwherein the instructions to cause the data processing apparatus to determine one or more candidates for a geo-location of a subject comprise instructions to cause the data processing apparatus to identify the one or more candidates positioned along the direction of the vector based on geo-information including polygonal contours corresponding to the one or more candidates. 13. A system comprising: at least one display device;at least one processor; andstorage configured to store instructions that are operable, when executed by the processor, to cause the system to perform operations comprising:obtaining from geo-metadata associated with an image, an acquisition geo-location for the image and an acquisition geo-orientation for the image;representing on a map the acquisition geo-location and the acquisition geo-orientation;determining one or more objects based, at least in part, on the acquisition geo-location and the acquisition geo-orientation, wherein the one or more objects represent one or more candidates of a subject depicted in the image;determining, for each of the one or more candidates, a distance between a focus point of the image and a geo-location associated with each of the one or more candidates;identifying, based on the determining, a primary candidate, the primary candidate positioned at the distance nearest the focus point;identifying the primary candidate as the subject of the image; andrepresenting the subject on the map. 14. The system of claim 13, further comprising: overlaying on the map a vector having an origin at the obtained acquisition geo-location and a direction corresponding to the obtained acquisition geo-orientation; andidentifying the one or more candidates positioned along the direction of the vector based, at least in part, on geo-information including polygonal contours corresponding to the one or more candidates. 15. A non-transitory computer readable medium encoded with a computer program, the program comprising instructions that when executed by a data processing apparatus cause the data processing apparatus to: obtain from geo-metadata associated with an image an acquisition geo-location for the image and a geo-location of a subject depicted in the image, wherein the subject is a point of interest in the image;represent on a map the acquisition geo-location and the geo-location of the subject;overlay on the map a first indicator corresponding to the acquisition geo-location and a polygonal contour corresponding to the geo-location of the subject;determine an angular range between the acquisition geo-location and boundaries of the polygonal contour;overlay on the map a vector having an origin at the obtained acquisition geo-location and a length representative of a focus distance associated with the image;determine, based at least in part on the angular range, one or more candidates for an acquisition geo-orientation;determine from the one or more candidates the acquisition geo-orientation; andrepresent the determined acquisition geo-orientation on the map. 16. The non-transitory computer readable medium of claim 15, wherein the instructions to cause the data processing apparatus to determine from the one or more candidates the acquisition geo-orientation comprise instructions to cause the data processing apparatus to: receive a request to orient the vector in a direction within the angular range;orient the vector in the requested direction; andgenerate a value of the acquisition geo-orientation based, at least in part, on an angle of the oriented vector. 17. A non-transitory computer readable medium encoded with a computer program, the program comprising instructions that when executed by a data processing apparatus cause the data processing apparatus to: obtain from geo-metadata associated with an image an acquisition geo-orientation for the image and a geo-location of a subject depicted in the image, wherein the subject is a point of interest in the image;represent the acquisition geo-orientation and the geo-location of the subject on a map;determine one or more candidates for an acquisition geo-location based on the acquisition geo-orientation and the geo-location of the subject depicted in the image;determine from the one or more candidates the acquisition geo-location based, at least in part, on a point along the acquisition geo-orientation at a distance from the geo-location of the subject that is substantially equal to a focus distance associated with the image; andrepresent the acquisition geo-location on the map.