Utah Landslide Compilation Polygons

This Landslide Compilation Polygons feature class represents landslide deposits throughout Utah, is the result of multiple landslide compilations and digitizing efforts by the Utah Geological Survey (UGS), and is not new landslide-specific mapping. Harty (1992, 1993) produced a statewide landslide compilation on 46 30’ x 60’ quadrangle maps at 1:100,000 scale. Landslides were compiled from all known pre-1989 published and unpublished references available at the time (Harty, 1992, 1993). The Utah Automated Geographic Reference Center (AGRC) digitized the 30’ x 60’ Harty (1992, 1993) quadrangle maps to create a digital statewide landslide deposit feature class. Elliott and Harty (2010) updated the AGRC feature class by adding additional landslides from 1989 to mid-2007 geologic maps and internal UGS landslide investigations. Elliott and Harty (2010) also added additional fields to the feature class. As a compilation, this data represents existing mapping from multiple sources, at a variety of scales and accuracies, and not new detailed comprehensive mapping of landslides. Last updated March 2016.本滑坡汇编多边形要素类（Landslide Compilation Polygons feature class）代表犹他州全域范围内的滑坡堆积体，由犹他州地质调查局（Utah Geological Survey, UGS）开展多次滑坡汇编与数字化工作整合而成，并非针对新滑坡的专项制图成果。哈蒂（Harty）于1992年、1993年基于46幅30′×60′分幅地形图完成了犹他州全域滑坡汇编，制图比例尺为1:100000，该汇编的滑坡数据来源于当时可获取的所有1989年之前已公开与未公开的已知参考文献（Harty, 1992, 1993）。犹他州自动化地理参考中心（Utah Automated Geographic Reference Center, AGRC）对上述哈蒂1992、1993年制作的30′×60′分幅地形图进行数字化，由此生成全州范围的滑坡堆积体数字要素类。埃利奥特与哈蒂（2010）对该AGRC数字要素类进行了更新：补充了1989年至2007年中期的地质图及犹他州地质调查局内部滑坡调查中发现的新增滑坡体，同时还为该要素类新增了属性字段。作为汇编类数据集，本数据整合了多来源、不同比例尺与精度的已有制图成果，而非全新的高精度全面滑坡制图成果。本数据集最后更新于2016年3月。