Databases
StackOverflow2013
Postsdbo
POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
    primarykey
    data
    text
    <p>I've got 2 questions on analyzing a GPS dataset.</p> <p><strong>1) Extracting trajectories</strong> I have a huge database of recorded GPS coordinates of the form <code>(latitude, longitude, date-time)</code>. According to date-time values of consecutive records, I'm trying to extract all trajectories/paths followed by the person. For instance; say from time <code>M</code>, the <code>(x,y)</code> pairs are continuously changing up until time <code>N</code>. After <code>N</code>, the change in <code>(x,y)</code> pairs decrease, at which point I conclude that the path taken from time <code>M</code> to <code>N</code> can be called a trajectory. Is that a decent approach to follow when extracting trajectories? Are there any well-known approaches/methods/algorithms you can suggest? Are there any data structures or formats you would like to suggest me to maintain those points in an efficient manner? Perhaps, for each trajectory, figuring out the velocity and acceleration would be useful?</p> <p><strong>2) Mining the trajectories</strong> Once I have all the trajectories followed/paths taken, how can I compare/cluster them? I would like to know if the start or end points are similar, then how do the intermediate paths compare? </p> <p>How do I compare the 2 paths/routes and conclude if they are similar or not. Furthermore; how do I cluster similar paths together?</p> <p>I would highly appreciate it if you can point me to a research or something similar on this matter.</p> <p>The development will be in Python, but all kinds of library suggestions are welcome.</p> <p>Thanks in advance.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMurat Derya Özen
    1. USMurat Derya Özen
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. USMichael Koval
      1. VTFavorite
    1. COCheck out your tags. None of them are very popular. I'd consider changing `gps` to `gis` and definitely add the `python` tag.
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. USBill the Lizard
    2. COYou might consider crossposting your question on http://gis.stackexchange.com/
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. USradek
    3. CODo you have GPS device ID in that database?
      singulars
      1. POComparing/Clustering Trajectories (GPS data of (x,y) points) and Mining the data
      1. USyura
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload