Can a track with duplicate track-points be cleaned up by removing the duplicates? Some are duplicated twice and some I have found have 4 identical track-points.

These a third-party tracks of underwater creeks so they are linear tracks with branching. But the duplicate track-points are not at branches or joining points, but some could be.

It's like the track was overlaid or merged with itself.

There is no specific method for removing duplicates - do they cause a problem in ReefMaster or somewhere else?
If you add them to a User Map, you can simplify to a low value, which will remove duplicates - although you will also lose other track-points, which may or may not be desirable.
Other than that you can delete them one-by-one in the graphical track editor (right-click, delete). Although this isn't going to be a practical solution if you don't know where they are, or there are a lot of them.

Matt

I wonder if they are true duplicates, or if a 5-10Hz GPS position is being rounded, resulting in apparent superimposition of positions. Its possible that in fact its simply that the positions are less than (for example) 2m apart and are being truncated by a missing decimal place.

T

I really think that whoever built the tracks had to place track-points out a branch, then overlay track-points back to the trunk. ???

I am manually reconstructing the creek and rivers.

The original track had 8092 track-points, I'm 3/4 done and have ~2600 track-points.
I'm placing a track-point on creek bends and not allowing any 2 track-points to not be more than 200-300ft distance(for zoom-in display).

I am submitting a Reefmaster Feature suggestion that I will likely need.

This process of build creeks and rivers, will result in 30-50 individual tracks that I can include in a User Map. I write-out this User Map(with 30-50 track-segments) as a Humminbird .HT file.

I would like Reefmaster to be able to import this 000.HT file and have the track-segments remain as individual track-segments and remain unconnected.

Hi,

you've completely lost me.....its most unusual to have trackpoints for chart creation 2-300ft apart. Maybe you could post some screenshots to explain your problem. ? Are you talking about waypoints rather than trackpoints maybe ?

T

Nope, I'm talking tracks with track-segments.
I've rebuild the creeks for the lake and now I have 141 individual tracks.
Some single creeks might actually be 3-5 branches and a main trunk for a total of 4-6 tracks for the creek.

I build a User Map of that creek using these 4-6 individual tracks. I was assuming this User Map was one track with 4-6 track-segments.

I was assuming I could then write out this track, turn-around and import this track, and it would remain one track with track-segments, but this imported track is just a track(no segments).

Here is a extreme example using all 141 creek tracks.

The lake map of creeks written out and in use on my Humminbird is this:

If I import this back into Reefmaster, then I have this:

Now this is the entire lake with all the creeks. I was hoping to just merge or combine the tracks necessary to create single creeks to reduce the 141 tracks.

I'm going to guess that the original creek map was a closed-loop track where they back-tracked up and down the creek branches, thus the original had duplicate track-points one when they went down and another when they returned up the creek branch.

They didn't understand tracks with track-segments. Or maybe I don't.

I manually rebuilt this map and reduced the number of track-points from 17,000+ to about 10,000+ track-points. And it can now be editable for updating.

Here is a better example of my attempting to build a creek from a collection of creek track-segments:

User Map of creek:

User Map of creek re-imported:

Problem: The track-end-points are joined.