2010/11 Aquatic Areas - Upper Mississippi River System - Pool 13

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). Aerial images of Pools 1-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of 2010 at 8”/pixel and 16”/pixel respectively using a mapping-grade Applanix DSS 439 digital aerial camera. In August 2011, CIR aerial images of Pools 14-Open River South, Upper Mississippi River and Pools Dresden-Lockport, Illinois River were collected at 16”/pixel with the same camera. The CIR aerial images were interpreted and automated using a 31-class LTRM vegetation classification. These data have been used to create a variety of products, one of which is a data set used to classify aquatic areas. The 2010/11 aquatic areas data sets were created by first generalizing the available land cover/use data into a land/water data set, then reinterpreting 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）中北部环境科学中心（Upper Midwest Environmental Sciences Center，缩写UMESC）为密西西比河上游水系（Upper Mississippi River System，缩写UMRS）构建了高分辨率土地覆盖/利用数据集。2010年8月，该中心使用测绘级Applanix DSS 439数字航空相机，分别以8英寸/像素和16英寸/像素的分辨率，采集了密西西比河上游水系1-13号航段及伊利诺伊河奥尔顿-马赛尔斯航段的彩色红外（color infrared，缩写CIR）航空影像。2011年8月，使用同款相机，以16英寸/像素的分辨率采集了密西西比河上游14号航段至南部开放河段以及伊利诺伊河德累斯顿-洛克波特航段的彩色红外航空影像。研究团队采用31类LTRM植被分类体系，对上述彩色红外航空影像开展解译与自动化处理。上述数据集已被用于生成多种衍生产品，其中一款数据集专门用于水生区域分类。2010/2011年度水生区域数据集的构建流程为：首先将现有土地覆盖/利用数据泛化为土地/水域数据集，随后对被归类为水域的区域进行重新解译，以明确其水生区域类型。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交汇处至伊利诺伊州乔利埃特的伊利诺伊河河段。