GPS is easy and sometimes "good enough" but when it comes to mapping broadband capacity, accuracy is critical. In cities with tall buidings, on cloudy days, GPS data points can be unattainable or unreliable. QMapper enables the user to pinpoint their location and run QPerf, QCarrier and QWiFi from that particular location. QCarrier and QWiFi create XML files while QPerf uploads the data to a server.