Overlaying lat/long graticules on projected map using QGIS?

Question

I am using an equal areas projection of North America and would like to overlay a lat/long grid.

I can do this in the print composer, but only for the coordinates.

Can QGIS do a distorted grid for lat/long coordinates over a projected map? If so, how?

Answer 1

Not built in , AFAIK. The way I do this is by creating a polygon shape file "grid" and then reprojecting it. So you could:

1. enable On-the-fly reprojection
2. Set the CRS to Lat/Lon
3. Use the Vector->Research Tools->Vector Grid to create a polygon grid at whatever interval is appropriate
4. Display the polygons with no fill, to show only the grid lines.
5. Return to your projected CRS, but keeping on the fly reprojection.

Now the Lat/Lon grid lines will display "distorted". If you also want to show coordinate labels on the grid lines, maybe this (somwhat old) post will be helpful.