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Use this tag when referring to improving or optimizing a process such as a script, application or software.

2 votes

Why does rescaling by 1.0 speed up this PostGIS query

Because ST_Rescale doesn't scale the raster by that amount, but to that amount, unlike OpenCV. I guess that means the way I've proposed is slower in PostGIS than OpenCV.
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1 vote
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Why does rescaling by 1.0 speed up this PostGIS query

To preface, I'm not sure if it matters, but I'm using PostgreSQL 11 with PostGIS 2.5 (through Docker on Windows) and accessing it with Python through PsycoPG2. My raster has the recommended index on …
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