<< Click to Display Table of Contents >> Navigation:  Wadiso 6 Tutorial > Wadiso 6 Tutorial: step-by-step > Additional modelling exercise > Updating of node elevations

As a next step for Example 2, the updating of node elevations can be done. This is possible directly from the program, if there is a file available covering the model area, with spot height results in “Y,X,Z“ format, from an aerial or other survey. For this example, such a file exists as …\Wadiso 6 - Tutorial 2 DTM.yxz. The file contains a grid of elevations, at a density of 50 m x 50 m. An excerpt from the file is shown below:

 

Y-values        X-values        Z-values

87658                2913988        1564.73438

87648                2913988        1564.56592

87638                2913988        1564.67188

87628                2913988        1564.75000

87668                2913978        1565.45374

87658                2913978        1565.53735

87648                2913978        1564.49109

87638                2913978        1564.69971

87628                2913978        1564.74402

87668                2913968        1565.51392

87658                2913968        1565.66943

87648                2913968        1565.42603

87638                2913968        1564.85327

87628                2913968        1564.81873

 

Load the internal DTM model into Wadiso from DTM > Load DTM, and browse to the above survey file.

 

The DTM is then built in memory. You can verify the extent of the DTM by selecting DTM > Show DTM Points. The elevation of individual points comprising the DTM mesh can be checked by clicking on them and reading the Z value at the bottom right of the screen.

 

Finally, to update all the node elevations, navigate to DTM > Update Model Elevations > For All > Nodes and Tanks.

 

As a check, the user can click on the node at the southern end of the 300 mm pipe, to verify that an elevation has been calculated for this node.