Hello,
I have the Altidute data in the GPX files. If the Altitude data anyway brought to the highchart from an external server?
The United States Geological Survey USGS, provides global SRTM (Altitude) data.
http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/
Is it possible to use the Altitude data from the GPX file, and create an autonomous high chart? (Make it autonomous from highchart.com)
For GPX files that have no information Altitude, can indeed continue Highchart.com offered.