Arc Extract Breakline from DEM: Difference between revisions
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Created page with "=Introduction= This page outlines the method used to take a line feature class, and extract elevations from DEM for input to TUFLOW breaklines. This is useful if you have a hydr..." |
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# Extract elevations directly from DEM
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This method requires that the line has been digitised at the high or low point that you are trying to represent. If
'''Method 2'''
Method 2 creates a buffer around each points and can be used to extract the maximum, minimum or average elevation from the DEM within this buffer. This ensures that the control is represented, even if the line does not follow the levee crest or centreline perfectly. The steps involved are:
The steps involved are:▼
# Convert line vertices to points
# Create a buffer around each point (specified buffer distance)
# Extract desired elevation statistic (max, min, mean) for each region
# Assign elevation from buffer to point
=Method 1 (point inspection)=
<ol>
<li>The first step is to create a point feature class from the line, to do this follow the method outlined in the <u>[[Arc_Lines_to_Points | convert lines to points tip.]]</u></li>
<li>To create a buffer (region) object around each of the points, firstly open a region feature class. Copy the 2d_zsh_empty_R template to a working directory and rename).</li>
</li>Make the layer
</ol>
=Method 2 (region inspection)=
<ol>
</ol>
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