I have document:

<build>
    <name>TestName</name>
    <contours>
      <contour>
        <entity_spatial>
          <spatials_elements>
            <spatial_element>
              <ordinates>
                <ordinate>
                  <x>578943.62</x>
                  <y>1403153.28</y>
                </ordinate>
                <ordinate>
                  <x>578943.19</x>
                  <y>1403159.55</y>
                </ordinate>
                <ordinate>
                  <x>578935.03</x>
                  <y>1403159.09</y>
                </ordinate>
              </ordinates>
            </spatial_element>
          </spatials_elements>
        </entity_spatial>
      </contour>
      <contour>
        <entity_spatial>
          <spatials_elements>
            <spatial_element>
              <ordinates>
                <ordinate>
                  <x>578935.46</x>
                  <y>1403152.82</y>
                </ordinate>
                <ordinate>
                  <x>578943.62</x>
                  <y>1403153.28</y>
                </ordinate>
              </ordinates>
            </spatial_element>
          </spatials_elements>
        </entity_spatial>
      </contour>
    </contours>
  </build>

So there i want to get list of x and y. But i want to enumerate countour blocks. I mean:

contour x y
1 578943.62 1403153.28
1 578943.19 1403159.55
1 578935.03 1403159.09
1 578943.62 1403153.28
2 578935.46 1403152.82
2 578943.62 1403153.28

Now i can get list of x and y:

declare @xml xml

set @xml = '
    <build>
    <name>TestName</name>
    <contours>
      <contour>
        <entity_spatial>
          <spatials_elements>
            <spatial_element>
              <ordinates>
                <ordinate>
                  <x>578943.62</x>
                  <y>1403153.28</y>
                </ordinate>
                <ordinate>
                  <x>578943.19</x>
                  <y>1403159.55</y>
                </ordinate>
                <ordinate>
                  <x>578935.03</x>
                  <y>1403159.09</y>
                </ordinate>
              </ordinates>
            </spatial_element>
          </spatials_elements>
        </entity_spatial>
      </contour>
      <contour>
        <entity_spatial>
          <spatials_elements>
            <spatial_element>
              <ordinates>
                <ordinate>
                  <x>578935.46</x>
                  <y>1403152.82</y>
                </ordinate>
                <ordinate>
                  <x>578943.62</x>
                  <y>1403153.28</y>
                </ordinate>
              </ordinates>
            </spatial_element>
          </spatials_elements>
        </entity_spatial>
      </contour>
    </contours>
  </build>

' 


select
    xml_ordinates.ordinate.value('(./x)[1]','decimal(20,2)') AS X
   ,xml_ordinates.ordinate.value('(./y)[1]','decimal(20,2)') AS Y
from @xml.nodes('/build') land (land)
    CROSS APPLY land.land.nodes('./contours/contour/entity_spatial/spatials_elements/spatial_element/ordinates/ordinate') xml_ordinates(ordinate)

But how can i enumerate contours blocks?