Hi Christoph,

Thanks for the help. It seemed to work when I added the layer to the time 
manager without any layer styling being done beforehand. Once the layer was 
added to the time manager, I could do some layer styling and it would still 


From: Christoph Lauber [mailto:christoph.lau...@geoplanteam.ch]
Sent: Wednesday, August 31, 2016 1:15 AM
To: Steiginga, Luke; qgis-user@lists.osgeo.org
Subject: AW: [Qgis-user] Issue using time manager to show a line that changes 
in thickness over time

Hi Luke

I used the time manager a while ago for "colour-changing" on polygons, 
depending a temperature attribute.
First thing is, that your layer must show up on the map without using the time 
manager plugin. If this is not the case, then you should have a look on your 
layer style definition.
If the layer shows up, but you still don't see anything in the time manager, 
then you should try to make time manager work without any layer styling. Maybe 
the problem is not the layer but the timestamp format?

Freundliche GrĂ¼sse
Christoph Lauber

Von: Steiginga, Luke [mailto:luke.steigi...@nrc-cnrc.gc.ca]
Gesendet: Dienstag, 30. August 2016 14:50
An: 'qgis-user@lists.osgeo.org' 
Betreff: [Qgis-user] Issue using time manager to show a line that changes in 
thickness over time


I am running QGIS 2.8.9 and I am currently displaying a line that varies in 
thickness along its length. The entire line is made up of many smaller lines 
each having a different thickness. It was added using a csv file using a WKT 
column that contained the information necessary to make the lines. These 
smaller lines all have different thicknesses corresponding to a numeric value 
that had been previously calculated in the csv file.

This all works as it should.

My problem is that I now want to have this change at different times when I use 
the time manager. In other words, I want the thickness of each line to change 
from one week to another. The csv file has a start time and an end time as 
shown below in columns "Timestamp", and "End Time". The first column contains 
the numbers that I want to indicate the thickness.

Expected             x                              y                           
                                             Timestamp                End Time
0.0001109            -1247455.1          1419954.2            
LineString(-1247455.1 1419954.2, -1247455.2 1419954.3)                 4/1/2016 
6:00        4/8/2016 6:00
0.004392              -1247455.2          1419954.3            
LineString(-1247455.2 1419954.3, -1247571 1419993)                        
4/1/2016 6:00        4/8/2016 6:00

After 4/8/2016 6:00 there are different values for the thickness of the lines 
that I want displayed. These are lower down in the same file. I show a sample 
of what would be in the csv file at this point below:

Expected             x                              y                           
                                             Timestamp                End Time
0.002145              -1247455.1          1419954.2            
LineString(-1247455.1 1419954.2, -1247455.2 1419954.3)                 4/8/2016 
6:00        4/15/2016 6:00
0.003391              -1247455.2          1419954.3            
LineString(-1247455.2 1419954.3, -1247571 1419993)                        
4/8/2016 6:00        4/15/2016 6:00

Each new week, all columns except the first column remain exactly the same, 
because all I want to do is have the thickness of the line segments change with 

I tried to do this by opening the time manager and adding a layer. I set the 
start time as the "Timestamp" column and the end time as the "End Time" column. 
I am trying to make QGIS display one thickness for the first week and then show 
the second thickness for the second week and so on.

I would have expected this to work, but instead the layer doesn't show up on 
the map at all after doing this.

Could someone please tell me what I am doing wrong or how I could possibly 
resolve this issue?


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