Shaded-relief and Color Shaded-relief maps of the Willamette Valley, Oregon

This digital dataset was compiled from newly released U.S. Geological Survey 10-meter digital elevation model (DEM) data, along with stream and transportation coverages previously published on the internet. This report consists of a digital representation of the physiography of the Willamette Valley. Contained in this dataset is: 1) 10-meter DEM data for the entire Willamette Valley; 2) the ARC/INFO grids used to create the color shaded-relief and gray scale shaded-relief images; 3) the necessary data ARC/INFO data to used to plot these data; and 4) several reports detailing the data formats (this docuement) and producers used to create these datasets. The scale of the original 10-meter DEM data should not be violated. Any use of these original data smaller than the intended scale (1:24,000) will not yield improved accuracy.本数字数据集整合了最新发布的美国地质调查局（U.S. Geological Survey）10米分辨率数字高程模型（DEM）数据，以及此前在互联网上公开发布的水系与交通覆盖数据。本报告涵盖威拉米特河谷（Willamette Valley）地貌的数字化表征内容。本数据集包含以下内容：1）覆盖整个威拉米特河谷的10米分辨率DEM数据；2）用于生成彩色晕渲图与灰度晕渲图的ARC/INFO网格数据；3）用于绘制上述数据所需的ARC/INFO格式必要数据；4）多份详述本数据集数据格式（即本文档）与制作方的报告。不得擅自更改原始10米DEM数据的使用比例尺。若将这些原始数据用于小于预设比例尺（1:24000）的场景，将无法获得精度提升。