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Subject: Re: [geometry] Running Geometry libs test suite.
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2018-10-25 08:26:24

On Wed, 24 Oct 2018 at 23:14, Nicolas Troncoso <ntroncos_at_[hidden]> wrote:
> On Wed, Oct 24, 2018 at 12:44 PM Mateusz Loskot via Geometry <geometry_at_[hidden]> wrote:
>> It seems that DB-based approach may be easier for you than C++.
>> I'd rather use PostGIS to validate geometries, especially regarding
>> OGC compliance
> As you suggested I went on the DB route. These are my findings for future reference:
> I ran the same (or equivalent where applicable) query in:
> MySql 5.6: Success
> MySql 5.7.23: Failure
> MySql 8.0.12: Success
> Postgres server 10.5: Success
> MSSQL 2016: Success
> I attach the query for the curious.


I think the results are enough to assume validity checks in MySQL 5.7
are not reliable.

I've checked your geometry with PostGIS 2.1. It's valid there too.

Best regards,

Mateusz Loskot,

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