Culverts

The culvert data were originally collected in the mid-2000s by road shop crews using a Trimble GPS collector. Data are updated as new culverts are installed or existing but unmapped culverts are discovered. Descriptive information about each culvert, including size, material, condition, and association with tide gates is included in the attributes.The “House_Numb” field is used if the feature is near a known street address. “Location” is used when descriptive information about the feature’s location may be useful, as in when the feature is not easily found. “Attention_” is marked “yes” if the feature appears to need some maintenance or repair. “Remarks” is used to add any important information unique to the feature. “Name_of_Sy” is used to identify those features that are part of a named drainage system – most are not. "Outfall" indicates whether the culvert outfalls to the beach. "Tidegate" indicates whether there is some type of tidegate on the culvert. "Contact Info" refers to who is responsible for the tidegate本涵洞数据集最初于2000年代中期由道路作业班组使用天宝（Trimble）GPS采集终端采集得到。每当有新涵洞安装完成，或是发现已存在但未制图的涵洞时，数据集将同步更新。数据集的属性字段涵盖每座涵洞的描述性信息，包括尺寸、材质、技术状况以及与潮闸的关联关系。当该空间要素邻近已知街道地址时，可使用"House_Numb"字段；当要素的位置描述信息具备实用价值（例如该要素难以查找时），可使用"Location"字段；若该要素需要开展维护或修缮工作，则将"Attention_"字段标记为"yes"；"Remarks"字段用于补充该要素独有的各类重要信息；"Name_of_Sy"字段用于标识隶属于命名排水系统的空间要素，绝大多数要素均不属于此类；"Outfall"字段用于标注涵洞是否向海滩排水；"Tidegate"字段用于标注涵洞是否设置有潮闸（tidegate）；"Contact Info"字段用于记录潮闸的责任主体及联系方式。