This exercise is intended for you to build a base data set of geographic informa
This exercise is intended for you to build a base data set of geographic information for a watershed using the San Marcos Basin in South Texas as an example. The base dataset comprises watershed boundaries and streams from the National Hydrography Dataset Plus (NHDPlus). In addition, you will create a point Feature Class of stream gage sites by inputting latitude and longitude values for the gages in an Excel table that is added to ArcMap and the geodatabase. You will show how these locations can be connected to the NHDPlus flowlines using Linear Referencing and get some flow data for the Blanco River using the CUAHSI data downloader.
