int nodesInTree = si.getNodesInTree();
list.addElement("Nodes in Tree: " + nodesInTree);
list.addElement("Bounding Rectangle: (" + si.getBoundingX1() + ", "
+ si.getBoundingY1() + ") - (" + si.getBoundingX2() + ", "
+ si.getBoundingY2() + ")");
list.generate(out);
out.println("<H3>Spatial Index Data</H3>");
TableRowElement columnNames = new TableRowElement();
columnNames.addElement(new TableHeaderElement("Primitive ID"));
columnNames.addElement(new TableHeaderElement("x1"));
columnNames.addElement(new TableHeaderElement("x2"));