Checkered Gartersnake Range - CWHR R065 [ds1771]

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系（California Wildlife Habitat Relationships，以下简称CWHR）系统的组成部分之一。CWHR是一套面向加州陆生野生动物的综合性信息系统与预测模型。该系统旨在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收录了加州已知常住野生动物物种的生活史特征、管理现状、地理分布范围以及栖息地关联关系等信息。分布区地图用于展示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领域专家以1:500万比例尺绘制划定，并逐步更新为1:100万比例尺的修订版本。如需了解CWHR的更多详细信息，请访问其官方网页：https://www.wildlife.ca.gov/Data/CWHR。该网页提供了CWHR相关数据与用户文档的下载链接，涵盖的内容包括：现有分布区地图查询表（含物种代码、物种名称及分布区地图修订历史）、全套CWHR地理信息系统（Geographic Information System，以下简称GIS）数据、各分布区地图或物种生活史说明文档的PDF文件，以及《用户指南》。