Marsh Shrew Range - CWHR M011 [ds1807]

Vector datasets of CWHR range maps are one component of California Wildlife Habitat Relationships (CWHR), a comprehensive information system and predictive model for California's wildlife. The CWHR System was developed to support habitat conservation and management, land use planning, impact assessment, education, and research involving terrestrial vertebrates in California. CWHR contains information on life history, management status, geographic distribution, and habitat relationships for wildlife species known to occur regularly in California. Range maps represent the maximum, current geographic extent of each species within California. They were originally delineated at a scale of 1:5,000,000 by species-level experts and have gradually been revised at a scale of 1:1,000,000. For more information about CWHR, visit the CWHR webpage (https://www.wildlife.ca.gov/Data/CWHR). The webpage provides links to download CWHR data and user documents such as a look up table of available range maps including species code, species name, and range map revision history; a full set of CWHR GIS data; .pdf files of each range map or species life history accounts; and a User Guide.CWHR分布区矢量数据集是加州野生动物栖息地关联（California Wildlife Habitat Relationships, 简称CWHR）体系的组成部分之一，该体系是面向加州野生动物的综合性信息系统与预测模型。CWHR体系的构建初衷是为加州陆生脊椎动物相关的栖息地保护与管理、土地利用规划、环境影响评价、科普教育及科学研究提供支撑。CWHR体系收录了加州已知常住野生动物物种的生活史特征、保护管理等级、地理分布及栖息地关联等信息。分布区地图展示了各物种在加州境内当前的最大地理分布范围，该类地图最初由物种专家以1:500万比例尺手绘厘定，后续逐步以1:100万比例尺完成修订更新。如需了解CWHR体系的更多详情，请访问其官方网页：https://www.wildlife.ca.gov/Data/CWHR。该网页提供了CWHR数据与用户文档的下载链接，相关文档包括：涵盖物种代码、物种名称及分布区地图修订历史的可用分布区地图检索表；完整的CWHR地理信息系统（Geographic Information System, GIS）数据集；各物种分布区地图或物种生活史说明的PDF文件；以及用户使用指南。