Hello,
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
WKT
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
WKT
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
time.
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?
Thanks,
Luke
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