Map from a June 1956 report showing land use in the Portland area. City limits are shown for Portland, Fairview, Wood Village, Troutdale, Gresham, Milwaukie, Gladstone, Oregon City, West Linn, Lake Oswego, Tualatin, Beaverton, and Vancouver, Washington. This map was produced nearly 20 years before the adoption of Oregon's land use law in 1973, which requires urban areas to set boundaries to contain development.