I have a data set with a large number of start and end positions. I am trying to generate lines between start and end positions using the Geometry Generator but it does not work. I get no errors when running it, but the lines do not appear. I have found several answers to a similar qestion, e.g. this one, : Creating a line from two points in QGIS I select geometry Type as "LineString. Here is the code I have been trying to use.
make_line(make_point("shootlon" ,"shootlat"), make_point("haullon", "haullat"))
Small screenshot of the data, which is a text ("txt") file.
What could be the problem? Some of the older plugins e.g. "Points2one", do not work in QGIS 3.4.4.