1989 Aquatic Areas - Upper Mississippi River System - Pool 08

The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS) from 1:15,000-scale color infrared aerial photos. These data have been used to create a variety of products, one of which is a data set used to classify aquatic areas. The 1989 and 1991 aquatic areas data sets were created by first generalizing the available land cover/use data into a land/water data set, then reinterpreting the aerial photography within the areas classified as water to determine the type of aquatic area. Area coverage for this data set is the Upper Mississippi River between Minneapolis, MN and Cairo, IL, and the Illinois River from its confluence with the Mississippi to Joliet, IL.美国地质调查局（U.S. Geological Survey）上中西部环境科学中心（Upper Midwest Environmental Sciences Center, UMESC）基于1:15000比例尺的彩红外航空照片，制作了密西西比河上游流域（Upper Mississippi River System, UMRS）的高分辨率土地覆盖/利用数据集。此类数据已被用于生成多款衍生产品，其中一款数据集用于水生区域分类。1989年与1991年的水生区域数据集制作流程如下：首先将现有土地覆盖/利用数据概括为陆面/水面数据集，随后对被归类为水域的区域内的航空影像进行重新解译，以明确水生区域的类型。该数据集的覆盖范围为明尼苏达州明尼阿波利斯至伊利诺伊州开罗之间的密西西比河上游河段，以及从与密西西比河汇流点至伊利诺伊州乔利埃特的伊利诺伊河河段。