Chuvieco, E., 1993. Integration of linear programming and GIS for land-use modeling. International Journal Geographical Information Systems, Vol. 7, No. 1, p. 71-83. This IJGIS article gives you a nice example of linear programming for a land-use planning scenario in Spain. It shows the
integration of the basically aspatial method LP within a GIS.
Jones, C.B., 1997. Geographical Information Systems and Computer Cartography. Addison-Wesley Longman. Section on linear programming, p. 218-221. Rating: These few pages in Jones" basic GIS textbook give you a first overview
on the topic and help you to compare LP with other decision support approaches.