U.S. Geological Survey Open-File Report 2006-1279

Published 2006
Online only

A Spatial Overlay Ranking Method for a Geospatial Search of Text Objects

By Kenneth J. Lanfear, USGS Retired

Abstract

Earth-science researchers need the capability to find relevant information by location and topic. Conventional geographic techniques that simply check whether polygons intersect can efficiently achieve a high recall on location, but can not achieve precision for ranking results in likely order of importance to the reader. A spatial overlay ranking based upon how well an object's footprint matches the search area provides a more effective way to spatially search a collection of reports, and avoids many of the problems associated with an "in/out" (True/False) boolean search. Moreover, spatial overlay ranking appears to work well even when spatial extent is defined only by a simple bounding box.

Report

This report is presented in Adobe Acrobat format. To download the PDF file, right-click (PC) or control-click (Macintosh).

Open-File Report 2006-1279 [125-KB PDF]

Get Adobe Reader.

Accessibility FOIA Privacy Policies and Notices


Take Pride in America home page. FirstGov button U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2006/1279/index.html
Page Contact Information: Publication Services
Page Last Modified: 22:04:36 Sat 12 Jan 2013