I have an excel table with coordinates. i converted them in to a shapefile and defined the coordinate system (WGS84). The coordinates are withdrawn from the GPS. In ArcMap they can be shown and it seems that they are in the correct coordinate system but nevertheless I cannot edit them. It says: spatial reference does not match data frame. What does it mean? (I am sorry, I am quite new in working with arcgis) So i have to change the coordinate system of the shapefile?
Greetings and thank you!!