In this tutorial, learn how to use the Summarize Within tool to summarize counts, areas, and attributes of one layer inside polygons of another layer. To follow along, download the project package. For more details, read the text version of this tutorial at Learn ArcGIS. The data used in this lesson  districts) is from Esri India, Central Water Commission (CWC), Government of India (dams and reservoirs) and Esri India and the Survey of India (districts).