MapSearch: a protocol and prototype application to find maps

Judith Gelernter
<span title="">2008</span>
Even geographers need ways to find what they need among the thousands of maps buried in map libraries and in journal articles. It is not enough to provide search by region and keyword. Studies of queries show that people often want to look for maps showing a certain location at a certain time period or with a subject theme. The difficulties in finding such maps are several. Maps in physical and digital collections often are organized by region. Multi-dimensional manual indexing is
more &raquo; ... and so many maps are not indexed. Further, maps in non-geographical publications are indexed rarely, making them essentially invisible. In an attempt to solve actual problems, this dissertation research automatically indexes maps in published documents so that they become visible to searchers. The MapSearch prototype aggregates journal components to allow finer-grained searching of article content. MapSearch allows search by region, time, or theme as well as by keyword ( Automatic classification of maps is a multi-step process. A sample of 150 maps and the text (that becomes metadata) describing the maps have been copied from a random assortment of journal articles. Experience taking metadata manually enabled the writing of instructions to mine data automatically; experience with manual classification allowed for writing algorithms that classify maps by region, time and theme automatically. That classification is supported by ontologies for region, time and theme that have been generated or adapted for the purpose and that allow what has been called intelligent search, or smart search. The 150 map training set was loaded into the MapSearch engine repeatedly, each time comparing automatically-assigned classification to manually-assigned classification. Analysis of computer misclassifications suggested whether the ontology or classification algorithm should be modified in order to improve classification accuracy. After repeated trials and analyses to improve the a [...]
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