The defacto standard in network planning is to use Google Earth for dealing with a large collection of kmz and kml files that are provided by partners. Sadly this can quickly introduce spontaneous combustion of your computer or at least of google earth, as the data collection can grow quite quickly and that software as probably never meant to deal with such an enourmous amount of geodata. Luckliy there is a widely adopted open source GIS software called qGIS that can help with exploring large amounts of data. I will give a quick intro what shortcuts, plugins and quirks you can utilize to use qGIS for your KMZ Collection and do a "first steps for people in the network industry" tutorial. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog17/talk/HFMA8N/