1 research outputs found
Spatial Search Strategies for Open Government Data: A Systematic Comparison
The increasing availability of open government datasets on the Web calls for
ways to enable their efficient access and searching. There is however an
overall lack of understanding regarding spatial search strategies which would
perform best in this context. To address this gap, this work has assessed the
impact of different spatial search strategies on performance and user relevance
judgment. We harvested machine-readable spatial datasets and their metadata
from three English-based open government data portals, performed metadata
enhancement, developed a prototype and performed both a theoretical and
user-based evaluation. The results highlight that (i) switching between area of
overlap and Hausdorff distance for spatial similarity computation does not have
any substantial impact on performance; and (ii) the use of Hausdorff distance
induces slightly better user relevance ratings than the use of area of overlap.
The data collected and the insights gleaned may serve as a baseline against
which future work can compare.Comment: Paper accepted to GIR'19: 13th Workshop on Geographic Information
Retrieval (Lyon, France