Bridges

Bridges feature class was created by converting an existing KML file of bridge locations maintained by Shasta County Public Works, then adding and populating fields maintained in Public Work's Bridge Inspection Spreadsheet. These additional fields were added to simplify joining the feature class to the spreadsheet, and symbolizing on common attributes.桥梁要素类（Feature Class）的构建流程如下：首先转换由沙斯塔县公共工程部维护的现有桥梁位置KML文件，随后添加并填充公共工程部桥梁检查电子表格中维护的各类字段。增设上述额外字段的初衷，是为了简化要素类与该电子表格的关联操作，并实现基于通用属性的符号化展示。