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Monday, April 27, 2009

Map Built From Geotags

Above map of the US was built using information like the latitude/ information of geotagged Flickr photos. It’s from a research paper [PDF] by David Crandall, Lars Backstrom, Daniel Huttenlocher and Jon Kleinberg from Cornell University. From the abstract:

Our approach combines content analysis based on text tags and image data with structural analysis based on geospatial data. We use the spatial distribution of where people take photos to define a relational structure between the photos that are taken at popular places. We then study the interplay between this structure and the content, using classification methods for predicting such locations from visual, textual and temporal features of the photos. We find that visual and temporal features improve the ability to estimate the location of a photo, compared to using just textual features.

[Via Tony.]


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