Locating Restricted Facilities on Binary Maps
  In this paper we consider several facility location problems with applications to cost and social welfare optimization, when the area map is encoded as a binary (0,1) mxn matrix. We present algorithmic solutions for all the problems. Some cases are too particular to be used in practical situations, but they are at least a starting point for more generic solutions. 
Mugurel Ionut Andreica, Cristina Teodora Andreica, Madalina Ecaterina   Andreica