var layerid=new Array();
  layerid[0]="bg";
  layerid[1]="bump";  
  layerid[2]="fov";  
  layerid[3]="ctb"; 
  layerid[4]="fg";
  layerid[5]="tgrd";
  layerid[6]="grd";
  layerid[7]="igrd";
  layerid[8]="pot";
  layerid[9]="vec";
  layerid[10]="raw";
  layerid[11]="ctr";
  layerid[12]="trm";
  layerid[13]="label";

  var layername=new Array();
  layername[0]="Background";
  layername[1]="Texture";
  layername[2]="Radar FOV";
  layername[3]="Contributing Radars";
  layername[4]="Coastline";
  layername[5]="MLT Grid";
  layername[6]="Magnetic Grid";
  layername[7]="Geographic Grid";
  layername[8]="Potential Gradient";
  layername[9]="Fitted Vectors";
  layername[10]="LOS Vectors";
  layername[11]="Contours";
  layername[12]="Terminator";
  layername[13]="Labels";


  var layerstate=new Array();
  layerstate[0]="visible";
  layerstate[1]="visible";
  layerstate[2]="visible";
  layerstate[3]="hidden";
  layerstate[4]="visible";
  layerstate[5]="visible";
  layerstate[6]="hidden";
  layerstate[7]="hidden";
  layerstate[8]="visible";
  layerstate[9]="visible";
  layerstate[10]="hidden";
  layerstate[11]="visible";
  layerstate[12]="visible";
  layerstate[13]="visible";

  var layerfreq=new Array();
  layerfreq[0]=1;
  layerfreq[1]=1;
  layerfreq[2]=3;
  layerfreq[3]=3;
  layerfreq[4]=1;
  layerfreq[5]=0;
  layerfreq[6]=0;
  layerfreq[7]=1;
  layerfreq[8]=3;
  layerfreq[9]=3;
  layerfreq[10]=3;
  layerfreq[11]=3;
  layerfreq[12]=2;
  layerfreq[13]=3;