I've been using QGIS 2.10 for a few weeks and have just started trying to export maps using Map Composer. This might be a very common question with a trivial solution but I just can't figure it out. For some reason, the map grid and coordinates aren't correct, and I cannot find anyway to fix them.
In the image below, I have created a plot of an example bathymetry raster with a grid that is using map units (both project and raster are in UTM 24S CRS), and an interval of "5" for both X and Y.
I have also inserted a distance scale with "1 maps units per bar unit" and a fixed width of "50 map units".
I have measured objects using this scale and it seems to be correct. Unfortunately, it completely disagrees with the map grid coordinates. I am very connfused with this, and mystified by how I can fix this.
Also notice that the grid coordinates start at zero on the lower-left corner. This is also completely wrong. Also don't know how to fix.