code: function extractCellResolution(node, errorHandler) {
  
          var cr = findAttribute(node, imscNames.ns_ttp, "cellResolution");
  
          // initial value
  
          var h = 15;
          var w = 32;
  
          if (cr !== null) {
  
              var CELL_RESOLUTION_RE = /(\d+) (\d+)/;
  
              var m = CELL_RESOLUTION_RE.exec(cr);
  
              if (m !== null) {
  
                  w = parseInt(m[1]);
  
                  h = parseInt(m[2]);
  
              } else {
  
                  reportWarning(errorHandler, "Malformed cellResolution value (using initial value instead)");
  
              }
  
          }
  
          return {'w': w, 'h': h};
  
      }
docs: /*
  Returns the cellResolution attribute from a node