I'm trying to add two points on a map representing two sampling locations, but I don't know if I'm doing the .csv document correctly or the coordinates numbering or what, because the points are not showing up on the map. The coordinate system is NAD27 (USGS) but it doesn't specify anything else. Please HELP!
csv format simplified
Note... no blank lines, simple headers without spacing and comma-separated. Those coordinates are UTM-like, so just add it as xy data. Once added, save/export to a shapefile or a featureclass in a geodatabase. You should define its coordinate system appropriate for your zone.