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<p>What is the gdalinfo output on dem.tif ?<br>
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<div><span
style="box-sizing:border-box;color:rgb(31,35,40);font-size:14px">Is this
a bug? It appears that the data type change might be
influenced by the nodata value.<font face="monospace"><br>
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Yes, there is some logic to take the "union" of the largest data
types involved in the warping (but it should probably ignore nodata
values that are outside of the validity range of the input data
type. I didn't check what it does currently)<br>
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cite="mid:CAJbvKNoYMxa_JXK7BMwN=Zu1HHU2GE7hrjxegOmVxQfO4=Ab7g@mail.gmail.com">
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style="box-sizing:border-box;color:rgb(31,35,40);font-size:14px"><br>
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My software is free, but my time generally not.</pre>
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