class='warning'>Warning: Discarded datum Unknown based on WGS84 ellipsoid in CRS definition</span></div><div class='input'><span class='fu'><a href='https://r-spatial.github.io/sf/reference/plot.html'>plot</a></span><span class='op'>(</span><span class='va'>p</span><span class='op'>)</span>
</div><div class='img'><img src='line_sample-2.png' alt='' width='700' height='433' /></div></pre>
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