dittaeva / average-tracks Goto Github PK

Average elevation data if at all feasable

See article:
http://users.erols.com/dlwilson/gpswtavg.htm

Integrate with josm

Sometimes trails will take slightly different turns around big stones, houses, or other obstructions. If you average tracks that have taken these different turns, you might end up with a track that goes straight through or over the obstruction, making it of less quality than the original.

A function to stay within the error margin of the gps track could address this issue.

GPX tracks often contain elevation data from the GPS device. A function to average the elevation data would make the script more complete.

I follow instructions in http://wiki.openstreetmap.org/wiki/Average_tracks
I run R on Win 7 64 bits using the GUI interface.
File->Source R Code and I specify the .R file
I get following error

source("D:\GPS Logs\average-tracks.R")
Error in colnames<-(*tmp*, value = c("lon", "lat", "routeID")) :
'names' attribute [3] must be the same length as the vector [1]

I do not specify the "--no-save" option but that should not be the problem.
Thanks

Say for example you have tracks from a mountain hike; two tracks have point all the way from the beginning, including the tracks going to the top of the mountain, one tracks (the one with the most points) only covers the part on the mountain.

The resulting average track should then be an average of the two scripts for the beginning, and all three for the last part.

Currently the R script will use the track with the most points as its "authoritative" track.

If the user knows the quality of the tracks he should be able to specify which track should be the "authoritative"/"reference" track.

Using littler?: http://dirk.eddelbuettel.com/code/littler.html
or other solutions:
http://stackoverflow.com/questions/750786/whats-the-best-way-to-use-r-scripts-on-the-command-line

For most newbies it is easier to relate to installing a package. Package for ubuntu should be first priority.