Tyler Storm Culverts

A culvert is a pipe used to enclose a flowing body of water and typically used to allow water to pass underneath a road, railway, or embankment. Last update date shows the last time each assest was manipulated in any way. Install update source is how the install date was added into GIS. Last editor should show who the last person to manipulate the assest was. Install date gives an estimation of when each asset was actually installed in the ground, not put into GIS. Update source is the accuracy of each asset in our GIS system, GPS-SURVEY-GRADE is the most accurate form of data we have available涵洞（culvert）是用于包覆流动水体的管道，通常用于使水流从道路、铁路或路堤下方通过。最后更新日期用于标识各资产（asset）被任何形式修改的最后时间。安装更新源指安装日期被录入地理信息系统（GIS）的具体方式。最后编辑者字段用于记录对该资产进行最后一次修改的人员。安装日期用于估算各资产实际埋设至地下的时间，而非其被录入GIS系统的时间。更新源指代本GIS系统中各资产的数据精度水平，其中GPS-SURVEY-GRADE（GPS测量级）是当前可获取的最高精度数据形式。