<dem:tin>
    <gml:TriangulatedSurface>
        <gml:trianglePatches>
            <gml:Triangle>
                <gml:exterior>
                    <gml:LinearRing>
                        <gml:posList><!--省略--></gml:posList>
                    </gml:LinearRing>
                </gml:exterior>
            </gml:Triangle>
            <!--省略-->
        </gml:trianglePatches>
    </gml:TriangulatedSurface>
</dem:tin>