hector_mapping launch

I am trying to use hector_mapping + hector_geotiff but can't get the launch file right. I read through the suggestions for [hector_slam](http://wiki.ros.org/hector_slam?distro=jade), [hector_geotiff](http://wiki.ros.org/hector_geotiff?distro=jade), and of course [hector_mapping](http://wiki.ros.org/hector_mapping?distro=indigo) as well as launch files under hector_slam_launch and hector_mapping. Previously I was having difficulty getting the transform right but after fiddling around with base_link/base_frame/laser I (hopefully) remedied most issues. However when I run the launch file (below), I get the message that "GoetiffNode: Map service called successfully," then "Cannot determine map extends!" and "Couldn't set map transform." I haven't been able to figure out what's going wrong or why. I'm very much a beginner so apologies for any horrendous errors in the launch file. EDIT: I changed "laser0/scan" to "scan" and I am able to (briefly) see a map, however soon get the error that "Transform from map to base_frame failed". Any insight/suggestions would be appreciated.