iles and strips may also be extended in a z dimension to form
    volumes.  Data volumes are organized as "slices".  That is, all the
    data for a slice is colocated.  Volumes whose data is organized in
    tiles can also have a tile depth so that data can be organized in
    cubes.
  </p>
  <p>
    There are actually two interfaces for tiles.
    One interface is similar to scanlines,  to read a tiled image,
    code of the following sort might be used:
  </p>
  <p style="margin-left: 40px">
    <tt>main