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Top2. Motivation Examples
Let's consider Wikimapia, OpenStreetMap and Google Places as the example sources. Wikimapia provides names, types, latitudes, longitudes and polygon outlines for place entities, while OpenStreetMap gives elevation and address information, such as state and county name, in addition to the place names, amenities, longitudes, latitudes and polygons. In contrast, Google Places presents vicinity besides place names, types, latitudes and longitudes. For the same place, the extracted name from Wikimapia might be totally different from that provided by OpenStreetMap and Google Places. Moreover, for the same place, the location information may differ. For example, one place named “William Jefferson Clinton Middle School” by OpenStreetMap has coordinate “POLYGON((-118.2781488 34.0168423,-118.2771296 34.0163844,-118.2766575 34.0171002,-118.2755567 34.0166202,-118.2747842 34.0178341,-118.2756973 34.0181940,-118.2759215 34.0182743,-118.2757509 34.0185409,-118.2770739 34.0184743,-118.2781488 34.0168423))”. In contrast, the same place is named “Animo Jackie Robinson High School” in Google Places, and its coordinate is “Point(-118.275971,34.017466)”. While, the same place is named “William J. Clinton Middle School” in Wikimapia, and its coordinate is “Point(-118.276482,34.0174013)”.