Databases
StackOverflow2013
Postsdbo
POCalculating Speed Based on Randomly-Timed Received Position Coordinates
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
    primarykey
    data
    text
    <p>I'm writing an application that has a need to know the speed you're traveling. My application talks to several pieces of equipment, all with different built-in GPS receivers. Where the hardware I'm working with reports speed, I use that parameter. But in some cases, I have hardware which does NOT report speed, simply latitude and longitude.</p> <p>What I have been doing in that case, is marking the time that I receive the first coordinate, then waiting for another coordinate to come in. I then calculation the distance traveled and divide by the elapsed time.</p> <p>The problem I'm running into is that some of the hardware reports position quickly (5-10 times per second) while some reports position slowly (0.5 times per second). When I'm receiving the GPS position quickly, my algorithm fails to accurately calculate the speed due to the inherent inaccuracies of GPS receivers. In order words, the position will naturally move due to GPS inaccuracy, and since the elapsed time span from the last received position is so small, my algorithm thinks we've moved far over a short time - meaning we are going fast (when in reality we may be standing still).</p> <p>How can I go about averaging the speed to avoid this problem? It seems like the process will have to be adaptive based on how fast the points come in. For example if I simply average the last 5 points collected to do my speed calculation, it will probably work great for "fast" reporting units but it will hurt my accuracy for "slow" reporting units.</p> <p>Any ideas?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USMichael Mankus
    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
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. USlinski
      1. VTFavorite
    2. VO
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. This table or related slice is empty.
      1. VTUpMod
    1. CORead abount *Data Mining* it may helps you.
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. USHossein Narimani Rad
    2. CO@HosseinNarimaniRad do you feel like you just recommended to `read about algorithms` ?
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. USIlya Ivanov
    3. COIt's a broad question and there are lost of ways of doing it. It's not a question that can be answered here. It can be a research area (e.g. *Map Matching*). It can be a project and ...
      singulars
      1. POCalculating Speed Based on Randomly-Timed Received Position Coordinates
      1. USHossein Narimani Rad
 

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