Creating Spatiotemporal Semantic Maps from Web Text Documents - Space-Time Integration in Geography and GIScience - page 157

Text Documents

Creating Gazetteers
(spatial gazetteer,
temporal gazetteer,
semantic gazetteer) and
Hazard Ontology

Gazetteers and
Ontology Creation

Linguistic
Processing

Gazetteer
Match

Parsing Spatiotemporal
Semantic References

Ontology
Processing

Text Processing

Exporting Results

Annotate
Results

Geovisualization

Fig. 10.1 A framework for spatiotemporal semantic information extraction

documents. As a result of information extraction, a list of location names and time
references is obtained. The x,y coordinates are assigned to each extracted location
using Google's geocoder ( http://www.batchgeo.com/ ) . The mapping of extracted
spatiotemporal information is implemented using ESRI's ArcMap software.
Each document is ordered by its published date during spatiotemporal parsing.
The date of the document provides a time frame for the phenomena being analyzed.
Generally, each web-based news article includes a header specifying its published
date. This date is used to distinguish documents and sort them in the order that they