Question about clustering algorithm(projection)
Posted: July 21st, 2015, 4:34 am
I was looking for the algorithm for the clustering and found out that the clustering is done after projection.
I'm just curious that why clustering process should be done after projection process. Is there any reason for that not using the great circle distance or something?
Because it would be just hypothetic situation but if trajectories are starting from equator to near polar then clustering would be different between each mercator, polar and lambert projection.
I used this make_traj.sh file to test them and trajectories from this sample file showed different clustering for different projection.
*Added, I thought file wass uploaded but it wasn't. I upload the make_traj.sh file.
I'm just curious that why clustering process should be done after projection process. Is there any reason for that not using the great circle distance or something?
Because it would be just hypothetic situation but if trajectories are starting from equator to near polar then clustering would be different between each mercator, polar and lambert projection.
I used this make_traj.sh file to test them and trajectories from this sample file showed different clustering for different projection.
*Added, I thought file wass uploaded but it wasn't. I upload the make_traj.sh file.