Hello r-help, My question is regarding specific coding in ggmap. I am mapping radio telemetry detections of shorebirds using ggmap. I want the map to depict a specific point (lat/lon of a telemetry tower) where the bird was detected, as well as the following variables associated with that lat/long: date of detection and the number of individuals detected on that date. To avoid masking detections, I would like to include a graduated point that will change size based upon the number of individuals detected. The goal is to show what date a bird was detected at a telemetry tower and how many birds were detected at that telemetry, using a color scale and graduated symbol. My thought is to have the graduated color symbol stack on itself, larger symbol on the bottom and the smallest on the top (or make them transparent enough so symbols underneath others can be seen) . This way the number of individuals detected at the telemetry towers and the date they were detected are represented by one image. See link for example image <https://i.stack.imgur.com/fROg6.png>. Sample Data: X motusTagID ts recvLat recvLon recvProjID recvSiteName speciesSci num.det num.id 1 1 24741 2018-01-01 51.3 -80.6 1 Moosonee Calidris canutus 4 1 2 2 24743 2018-01-04 51.3 -80.6 1 Moosonee Calidris canutus 4 1 3 3 24747 2018-01-04 51.3 -80.6 1 Moosonee Calidris canutus 4 1 4 4 25089 2018-01-04 51.3 -80.6 1 Moosonee Calidris canutus 8 1 5 5 24779 2018-01-25 51.3 -80.6 1 Moosonee Calidris canutus 4 1 6 6 24746 2018-01-25 51.3 -80.6 1 Moosonee Calidris canutus 4 1 Sample Code I have Tried: See link to another source for a sample of the code I tried. https://stackoverflow.com/questions/57618926/how-do-i-code-in-r-so-my-time-stamp-field-is-represented-by-a-color-scale-and-th?noredirect=1#comment101931264_57618926 Thank you. *Joshua N. Barth* [[alternative HTML version deleted]]