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Many Web pages are rich in geographic information and primarily relevant to geographically limited communities. However, existing IR systems only recently began to offer local services and largely ignore geo-spatial information. This paper presents our work on automatically identifying the geographical scope of Web documents, which provides the means to… (More)
This paper addresses document indexing and retrieval using geographical location. It discusses possible indexing structures and result ranking algorithms, surveying known approaches and showing how they can be combined to build an effective Geo-IR system.
The analysis of human location histories is currently getting an increasing attention, due to the widespread usage of geopositioning technologies such as the GPS, and also of online location-based services that allow users to share this information. Tasks such as the prediction of human movement can be addressed through the usage of these data, in turn… (More)
This paper discusses the problem of automatically identifying the language of a given Web document. Previous experiments in language guessing focused on analyzing "coherent" text sentences, whereas this work was validated on texts from the Web, often presenting harder problems. Our language "guessing" software uses a well-known <i>n</i>-gram based… (More)
This paper discusses evaluation of Geo-IR systems, arguing for a separate study of the different algorithmic components involved. It presents existing resources for evaluating the different components, together with a review on previous results in the area.
This paper proposes simple techniques for handling place references in search engine queries, an important aspect of geographical information retrieval. We address not only the detection, but also the disambiguation of place references, by matching them explicitly with concepts at an ontology. Moreover, when a query does not reference any locations, we… (More)
This paper presents methods for annotating georeferenced photos with descriptive tags, exploring the annotations for other georeferenced photos which are available at online repositories like Flickr. Specifically, by using the geospatial coordinates associated to the photo which we want to annotate, we start by collecting the photos from an online… (More)
DIGMAP is a project focused on historical digitized maps. The project will develop a set of services, to be available in the Internet, based on reusable open-source software solutions. The main service will provide discovery and access to resources related to historical cartography, based on metadata from European national libraries and other relevant third… (More)