The .gpx files store all the points' details in the WGS 84 spatial reference system; therefore, we created the rk_track_points table with SRID (4326).
After creating the rk_track_points table, we imported all of the .gpx files in the runkeeper_gpx directory using a bash script. The bash script iterates all of the files with the extension *.gpx in the runkeeper_gpx directory. For each of these files, the script runs the ogr2ogr command, importing the .gpx files to PostGIS using the GPX GDAL driver (for more details, go to http://www.gdal.org/drv_gpx.html).
In the GDAL's abstraction, a .gpx file is an OGR data source composed of several layers as follows:
In the .gpx files (OGR data sources), you have just the tracks and
