Tute M01 Inspect Zpts SAGA: Difference between revisions
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If you select a Zpt outside the DEM area the value that has been assigned to this attribute is -99,999. We will remove any Zpts that have this elevation.
<li>In the ''Modules'' option select ''Shapes - Tools >> Select by Attributes... (Numerical Expression)</li>
<li> Set the following:
* Shapes to '''2d_zpt_M01_5m_003_P'''
* Attribute to DEM_M01
* Expression to "a < 0" (without the quotes)
Select ''Okay''.
[[File:Tute M01 Saga Select By Attribute.png|frame|none|Select by Attribute]]
<li> Navigate to the ''Data'' tab in the ''Workspace'' window. The Zpts outside of the DEM should be highlighted. To delete these, right click on the '''2d_zpt_M01_5m_003_P''' item and select ''Edit >> Delete Selected Shapes''.</li>
[[File:Tute M01 Saga Zpt NullRemoved.png|frame|none|Map View with null Zpts Removed]]
<li>Save the current TGC file as '''M01_5m_003.tgc'''. Comment out or delete the Write MI and Stop lines entered previously (these are no longer needed).</li>
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