Baltimore County Web Map Portal. (2016). Basic Services - Sewer Relief Points: Baltimore County, Maryland. Baltimore County, Maryland. http://data-bc-gis.opendata.arcgis.com/datasets/9d7af81ec68447f2aa3b49e7578d2eae_1

Available from: https://geo.btaa.org/catalog/9d7af81ec68447f2aa3b49e7578d2eae_1