OVERPROP --- Calculating Areas of Map Overlay Polygons without Calculating the Overlay

@inproceedings{fs-ocamo-90-in-geom,
    author = "Franklin, Wm Randolph and Sivaswami, Venkatesh",
    title = "{OVERPROP} --- Calculating Areas of Map Overlay Polygons without Calculating the Overlay",
    booktitle = "Canadian National Conference on Geographic Information Systems: Challenge for the 1990's",
    publisher = "Canadian Institute of Surveying and Mapping",
    address = "Ottawa",
    pages = "1646--1654",
    month = "5-8 Mar",
    year = "1990",
    href = "\bibhref{61-ottawa90-overlay}",
    mykey = "overlay",
    keywords = "intersection, area, grids"
}