[postgis-users] using postgis for bathymetry data

Amy O'Keefe OKeefe-A2 at ulster.ac.uk
Fri Nov 20 08:48:52 PST 2020

I have xyz bathymetry data from a port which I'm trying to calculate the volume of regions for. My results in ArcGIS always seem to differ from that in PostGIS - I have no idea which is more accurate or how each calculates its final result. I've loaded the exact same raster into postgis and use the intersect query to extract the required polygon of interest, before extruding it and then taking the volume. I'm quite new at this, so I'm afraid I'm going the wrong way about it

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