Adding a overlay / track

I would like to add an overlay or track for general public use to the map. This is for a research project

This would need to show pentads (these cover 5 minutes of latitude by 5 minutes of longitude (5’ × 5’)). Is there a way I can show selected minutes (5 minutes) on the map?

Alternatively I have these as a track (gpx) that can be loaded. It does not have timer points to the track. I also have it in kmz format for google earth.

Any help would be appreciated.


So you need something like ?

Be aware that openlayers has developed much in the past years … see → examples

or → plugins

or try

For OpenLayers with an overlay for latitude/longitude, look at the graticules feature. See this example: