| 摘要 |
A system is disclosed in which a geographic area of interest can be selected, and photographic images of the selected area can be downloaded and displayed by a user in an efficient and timely manner. The geographic area of interest may initially be selected by various input means such as a map, longitude/latitude coordinates, a global positioning system (GPS), and the like. Once the particular geographic area has been selected, photographic images corresponding to the selected area are downloaded to the user. The photographic images may be stored in a suitable data storage system such as a server. Alternatively, the photographic image data may be generated real time and downloaded to the user. In one embodiment, a relatively low resolution image of a large geographic area is initially displayed to the user, and the user can then select a limited region of the image for closer viewing. The limited region of the photographic image may then be downloaded to the user in a higher resolution format, thereby reducing the amount of high resolution data that must be transmitted to the user. Various display devices may be used, such as personal data assistants (PDAs), laptop computers, desktop computers, vehicle-mounted computers, tablets, cell phones and the like. The display device may also be used as the input device to both select the geographic area of interest and display the photographic images of the selected area.
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