MD iMAP: Maryland Green Infrastructure - Green Infrastructure Gaps

This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. These data provide restoration value rankings and ecological attributes associated with green infrastructure gaps. The Green Infrastructure Assessment was developed to provide decision support for Maryland's Department of Natural Resources land conservation programs. Methods used to identify and rank green infrastructure lands are intended soley for this use. Other applications are at the discretion of the user. The Maryland Department of Natural Resources is not responsible for any inaccuracies in the data and does not necessarily endorse any uses or products derived from the data other than those for which the data were originally intended. Maryland's green infrastructure is a network of undeveloped lands that provide the bulk of the state's natural support system. Ecosystem services - such as cleaning the air - filtering water - storing and cycling nutrients - conserving soils - regulating climate - and maintaining hydrologic function - are all provided by the existing expanses of forests - wetlands - and other natural lands. These ecologically valuable lands also provide marketable goods and services - like forest products - fish and wildlife - and recreation. The Green Infrastructure serves as vital habitat for wild species and contributes in many ways to the health and quality of life for Maryland residents. To identify and prioritize Maryland's green infrastructure - we developed a tool called the Green Infrastructure Assessment (GIA). The GIA was based on principles of landscape ecology and conservation biology - and provides a consistent approach to evaluating land conservation and restoration efforts in Maryland. It specifically attempts to recognize: a variety of natural resource values (as opposed to a single species of wildlife - for example) - how a given place fits into a larger system - the ecological importance of natural open space in rural and developed areas - the importance of coordinating local - state and even interstate planning - and the need for a regional or landscape-level view for wildlife conservation. The GIA identified two types of important resource lands - hubs"" and ""corridors."" Gaps are developed - agricultural - mined - or cleared lands within the Green infrastructure network that could be targeted for restoration. These were evaluated for their potential restoration to forest - wetland - or riparian buffers - by considering watershed condition - landscape position - local features - ownership - and programmatic considerations. Gaps with hydric soils were probably once wetlands - and could be restored as such. Reforestation of gaps along streams would not only benefit wildlife - but improve water quality and stream stability. Please refer to the Green Infrastructure web site (http://www.dnr.state.md.us/greenways/gi/gi.html) for additional information. Last Updated: Feature Service Layer Link: https://mdgeodata.md.gov/imap/rest/services/Biota/MD_GreenInfrastructure/MapServer ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively the ""Data"") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

本数据集为马里兰州iMAP（Maryland iMAP，简称MD iMAP）托管服务图层。更多信息请访问 http://imap.maryland.gov。
本数据集提供了与绿色基础设施缺口相关的修复价值排名及生态属性信息。
绿色基础设施评估（Green Infrastructure Assessment，简称GIA）旨在为马里兰州自然资源部的土地保护项目提供决策支持。本数据集所采用的绿色基础设施地块识别与排名方法仅适用于该场景，其他应用场景由使用者自行决定。
马里兰州自然资源部不对数据中的任何不准确之处承担责任，且不认可本数据集原始用途之外的任何衍生使用或衍生产品。
马里兰州的绿色基础设施是由未开发地块构成的网络，为该州提供了核心的自然支撑体系。生态系统服务——包括净化空气、过滤水体、储存与循环养分、保护土壤、调节气候以及维持水文功能——均由现有成片的森林、湿地及其他自然土地提供。这些具有生态价值的地块同时提供可市场化的商品与服务，例如林产品、渔获与野生动物资源以及休闲娱乐服务。绿色基础设施为野生生物提供了关键栖息地，并从多方面助力马里兰州居民的健康与生活质量提升。
为识别马里兰州绿色基础设施并确定其优先级，我们开发了名为绿色基础设施评估（GIA）的工具。该评估工具基于景观生态学与保护生物学原理，为马里兰州的土地保护与修复工作提供了统一的评估方法。其核心目标涵盖：多元自然资源价值（例如区别于单一野生动物物种的评估）、特定地块在更大生态系统中的定位、乡村与建成区内自然开放空间的生态重要性、协调地方、州级乃至跨州规划的重要性，以及野生动物保护需采用区域或景观尺度视角的必要性。
该评估工具识别出两类重要资源地块：核心节点（hubs）与连通廊道（corridors）。
绿色基础设施网络内的缺口地块，指可开展修复的已开发、农业用地、采矿用地或已清理地块。评估团队通过考量流域状况、景观位置、本地特征、土地所有权以及项目相关因素，来判定这些缺口地块修复为森林、湿地或河岸缓冲带（riparian buffers）的潜力。带有水文性土壤（hydric soils）的缺口地块原本大概率为湿地，可按湿地标准进行修复。对溪流沿线缺口地块开展再造林，不仅能够惠及野生生物，还可改善水质与溪流岸坡稳定性。
更多信息请访问绿色基础设施官方网站：http://www.dnr.state.md.us/greenways/gi/gi.html。
最后更新时间： 服务图层链接：https://mdgeodata.md.gov/imap/rest/services/Biota/MD_GreenInfrastructure/MapServer
附加许可条款：空间数据及其所含信息（以下统称"本数据"）按"现状"提供，不提供任何形式的明示、默示或法定担保。使用者需自行承担使用本数据的全部质量与性能风险。本数据不保证准确性，也不承担因依赖本数据而产生的任何责任。在任何情况下，马里兰州均不对任何直接、间接、附带、从属或特殊损害承担责任。马里兰州不对因本数据不准确或数据变更导致的任何损害或误述承担责任，也不承担以任何方式或形式维护本数据的义务。本数据可自由分发，但不得修改或删除元数据条目。任何由本数据衍生得到的数据，均需在其元数据中注明来源为马里兰州。