PostgreSqlConnection connection = new PostgreSqlConnection("src/connections.properties","connection4");
try{
//opening the database connection
connection.openConnection();
//create the relational tables
String[] columns_space_dim = {"id","environment_name","environment_geom","region_name","region_geom","area_name","area_geom"};
String tableName_space_dim = "trdw_space_dimension";