RPi is cappible of running Maptools. I've found xRDP to be faster on the reffresh rate when working headless via Android or laptop running Windows or Ubuntu. For forwarding the desktop I suggest VNC though because you can setup a view only password for forwarding the desktop (mirrored) to a Nintindo Wii.
sudo apt-get install xdrp tightvncserver
sudo apt-cashe search java
# install JDK 7 or 8 from sun or open. Both seem to work.
Start and stop services
# xRDP options
sudo service xrdp # start stop restart status
# start VNC server
# stop VNC server
vncserver -kill :1
When starting VNC for the first time you'll be promted to enter first the controll
then the viewer
passwords and when connecting via client app or service it is the useage of one of those passwords that'll grant access to either control or only view the desktop. Currectly I've my RPi v.B2 controlled via Android and displaying the view on my Wii connected T.V.
The really tricky bit is getting the geometry on both clients set such that the controller sees everything and the viewer connection sees only the map section.