Digital terrain model of upper North Fork Toutle River valley, Washington, derived from historical topographic maps

This digital terrain model represents historical elevations along the valley of the North Fork Toutle River upstream of its confluence with the Green River in Cowlitz...本数字地形模型（Digital Terrain Model）展示了考利茨（Cowlitz）境内，图特尔河北支流（North Fork Toutle River）与格林河（Green River）汇流点上游河谷沿线的历史高程数据……