on a flight -analysis website, GPS tracks should be shown on a map together with graphs oaf altitude, speed and sinkrate. A running demo interpreting GPX files is available. This should be redesigned for interpretation of track file in CSV format and some functionality added. Since more data analysis screens will be added later, D3,js should be used.
Please read attached PDF description BEFORE sending a quote. Please send references regarding your GIS experience. If questions, please ask.