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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Donovan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Did you try the suggestion from the error message to use the -o flag?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">That overwrites the projection check and should link the data assuming the projection of your GRASS mapset.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> grass-user <grass-user-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Donovan Cameron<br>
<b>Sent:</b> tirsdag 17. august 2021 07:06<br>
<b>To:</b> grass-user@lists.osgeo.org<br>
<b>Subject:</b> Re: [GRASS-user] v.external, postgis materialized views and projection<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 2021-08-16 12:18 p.m., Phillip Allen wrote:<o:p></o:p></p>
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<p class="MsoNormal">I am not sure about GRASS's quirks in respect to this problem but I do see in QGIS that in my views I often have to specifically CAST my geometries so QGIS can see the Z & M values:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">example: SELECT b. sample_id, b. au_ppm, b. as_ppm, b. cu_ppm, ST_TRANSFORM(b.geom, 32718 )::geometry(LineStringZM,32718) FROM bore_hole b;<o:p></o:p></p>
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<p>Tested on a new set of polygons and casted but it didn't make a difference. GRASS doesn't like ST_Transform on materialized views it looks like.<o:p></o:p></p>
<p>All the views are opening in QGIS fine and with their correct projection and geometry type (with and without casting to a specific type).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Aug 16, 2021 at 1:10 PM Saulteau Don <<a href="mailto:sault.don@gmail.com">sault.don@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">When I use v.external to load a postgis materialized view it says the projection mismatches the Location but they are actually the same.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New";color:black">% v.external input="PG:host=localhost dbname=database" layer=table_1 output=t
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">ERROR: Projection of dataset does not appear to match current location.
</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> Location PROJ_INFO is:</span><br>
<span style="font-family:"Courier New""> name: NAD83 / UTM zone 10N</span><br>
<span style="font-family:"Courier New""> datum: nad83</span><br>
<span style="font-family:"Courier New""> ellps: grs80</span><br>
<span style="font-family:"Courier New""> proj: utm</span><br>
<span style="font-family:"Courier New""> zone: 10</span><br>
<span style="font-family:"Courier New""> no_defs: defined</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> init: EPSG:26910
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""><br>
Dataset PROJ_INFO is:</span><br>
<span style="font-family:"Courier New""> name: NAD83 / BC Albers</span><br>
<span style="font-family:"Courier New""> datum: nad83</span><br>
<span style="font-family:"Courier New""> ellps: grs80</span><br>
<span style="font-family:"Courier New""> proj: aea</span><br>
<span style="font-family:"Courier New""> lat_0: 45</span><br>
<span style="font-family:"Courier New""> lon_0: -126</span><br>
<span style="font-family:"Courier New""> lat_1: 50</span><br>
<span style="font-family:"Courier New""> lat_2: 58.5</span><br>
<span style="font-family:"Courier New""> x_0: 1000000</span><br>
<span style="font-family:"Courier New""> y_0: 0</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> no_defs: defined
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""><br>
Difference in: proj <br>
<br>
In case of no significant differences in the projection definitions, <br>
use the -o flag to ignore them and use current location definition. <br>
Consider generating a new location from the input dataset using the <br>
'location' parameter.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It looks like GRASS sees the projection from the source table used for the materialized view instead of the materialized views projection that was set in postgis using ST_Transform().<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is this normal for grass to see materialized views like this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Donovan<o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
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