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适用范围：<p>This practice addresses an AMLIS PU and its geospatial data relative to the Surface Mining Control and Reclamation Act of 1977 (SMCRA). In general, PUs east of the Mississippi River have historically corresponded to watersheds; PUs west of the Mississippi River have been defined in a number of ways, including quadrangles, grazing districts, townships, counties, or entire WCU. This practice is significant to communities impacted by abandoned mines because it provides for uniformity of geospatial data pertaining to the geographic location and description of AML PUs located throughout the United States. These standards will help ensure uniformity of data contributed by each RA and assist organizations in future efforts to create and utilize geospatial data relative to the reclamation of land and the remediation of watersheds located within the AML PUs across the United States. </p> <p>Qualitative and quantitative AMLIS PU descriptions shall be obtained from state and federal regulatory authorities. Use of this standard will help create consistent maps and increase the awareness of the AML PUs throughout the United States and the status of the current reclamation that occurs within each PU over time. This standard creates well organized and easily accessible AML PU data and relational attributes, and it will lead to better communication between RA and federal offices, the public, industry and environmental groups.</p> <p>As used in this practice, the geospatial data represents an area where coal removal occurred prior to SMCRA and these unreclaimed mining features continue to be present within a defined AMLIS PU, defined as a polygon feature. This practice creates an easier and more efficient way to utilize and share AML PU geospatial data between RAs and communities impacted by abandoned mines.</p> <p>The data set may be served as a layer in The National Map, an online, interactive map service sponsored by a consortium of US federal, state, and local partners and hosted by the U.S. Geological Survey (USGS). The National Map provides a consistent framework for high-quality, geospatial data and information from multiple partners to enhance America''s ability to access, integrate, and apply current, accurate, and nationally consistent digital data at global, national, and local scales.</p> <p>This standard conforms to the definition of a Data Content Standard as promulgated by the U.S. Federal Geographic Data Committee (FGDC). Terminology and definitions for identifying geographical features and describing the data model has been adopted from the FGDC Spatial Data Transfer Standard (ANSI INCITS 320-1998 (R2003)) and the FGDC Framework Data Content Standard (FGDC Project 1574-D) Information Technology <span class=''unicode''>x2013;</span> Part 5 Governmental unit and other geographic area boundaries.</p><p id="s00002">1.1 This practice covers the minimum elements for the accurate description of geospatial data for defining an Abandoned Mine Land Inventory System (AMLIS) Planning Unit (PU).</p> <p id="s2">1.1.1 This practice addresses mining geospatial data relative to the Surface Mining Control and Reclamation Act of 1977 (SMCRA). This geospatial data shall be obtained from each state, tribal, or federal (or combinations thereof) coal mining regulatory authority (RA) authorized under SMCRA to reclaim the surface and underground effects of past mining operations. Abandoned mine land (AML), as specified in SMCRA Sections 404 (coal), 409 and 411 (non-coal) and cross referenced in additional sections on eligible lands, consists of those lands and waters which were mined for coal or other minerals (or both), or impacted by processing operations prior to enactment of the SMCRA and abandoned or left in an inadequate state of reclamation and for which there is no continuing reclamation responsibility under state or other federal laws for mitigation of adverse impacts to human health and safety or environmental res......