<?xml version="1.0"?>
<dblp>
<article key="journals/tgis/RiggsD07" mdate="2009-09-14">
<author>Philip D. Riggs</author>
<author>Denis J. Dean</author>
<title>An Investigation into the Causes of Errors and Inconsistencies in Predicted Viewsheds.</title>
<pages>175-196</pages>
<year>2007</year>
<volume>11</volume>
<journal>T. GIS</journal>
<number>2</number>
<ee>http://dx.doi.org/10.1111/j.1467-9671.2007.01040.x</ee>
<url>db/journals/tgis/tgis11.html#RiggsD07</url>
</article>
</dblp>
