In QGIS 2.16.3, I have a point file, originally in the WSG84 (EPSG:4326) projection. I wish to determine the distance in km between each point in this point layer and intend to use the distance matrix tool to do this.
As WSG84 uses the unit dd, I first transformed my projection to what I believe is a metric transformation (Plate Carree (this was chosen as it was described in the QGIS manual as being proper when the goal is to measure distances)).
Problematically, when creating the distance matrix, the unit still comes out as dd, not km. I have also tried using the UTM transformation, with no luck.
After reading online, I saved my project (save as) and reopened it. Now, the drop down menu under Vector has changed, and I can no longer choose the distance matrix at all.
How do I calculate the distance between points in km?
I have now used the Save as function to save my point file in the UTM projection. But now the Vector drop down menu is altered, and I can no longer choose the distance matrix: