This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This is a MGRS 100km Square Identifier polygon shapefile. The polygons are defined by UTM zone and MGRS band letters into mostly 6 x8 polygons, with subdivisions into MGRS 100km Square Identifiers. There are no classification restrictions on this information. This information was created by the National Geospatial-Intelligence Agency (NGA) Coordinate Systems Analysis Team (SNAC).Feature Service Layer Link:https://geodata.md.gov/imap/rest/services/Location/MD_USNGZone17S/FeatureServer/1