All drainage features for the Unincorporated Miami-Dade Service Area (UMSA), which can be represented by points in a map, are represented in this layer, such as manholes, catch basins, drainage wells, inlets, valves, weirs and canal cross sections in the drainage network. The data was collected through permit files, surveys and “as-builts”, representing the best available information for each location at the time the layer was published.