ST_Distance() query error

[Juho Rekilä]

Hi,

The ST_Distance() query below gives the result of 0 m for the distance
between two features. The result is wrong as the features are actually
approximately 0,2 meters away from each other.

This error is also problematic because Geoserver now uses the ST_Distance()
function when searching for objects that are touching each other, for
example.

The PostgreSQL and PostGIS versions used:
PostgreSQL 17.5 (Ubuntu 17.5-1.pgdg24.04+1) on x86_64-pc-linux-gnu,
compiled by gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, 64-bit
POSTGIS="3.5.3 aab5f55" [EXTENSION] PGSQL="170" GEOS="3.12.1-CAPI-1.18.1"

The ST_Distance() query:

SELECT
  ST_Distance(

ST_GeomFromText('MULTISURFACE(CURVEPOLYGON(COMPOUNDCURVE(CIRCULARSTRING(25498687.296406467
6679794.584487298,25498670.728066746 6679772.920079741,25498652.7219
6679752.4351),(25498652.7219 6679752.4351,25498649.618
6679749.1379,25498615.3055 6679712.6856,25498584.874
6679680.3574),CIRCULARSTRING(25498584.874 6679680.3574,25498575.9211
6679678.4791,25498571.0593 6679686.228),(25498571.0593
6679686.228,25498572.5718 6679717.5059,25498572.5935
6679717.9476,25498572.6156 6679718.3893),CIRCULARSTRING(25498572.6156
6679718.3893,25498575.9546 6679753.1238,25498582.4167
6679787.4148,25498582.6547 6679788.418,25498582.8953
6679789.4206),(25498582.8953 6679789.4206,25498583.4717
6679791.8086,25498577.35416496 6679793.28540422),(25498577.35416496
6679793.28540422,25498558 6679652,25498706 6679794,25498687.296406467
6679794.584487298))))', 3879)
    ,ST_GeomFromText('POLYGON((25498577.925067347
6679764.376426865,25498577.31346041 6679760.722689815,25498576.736966014
6679757.06324837,25498576.19563731 6679753.398439955,25498575.68952422
6679749.72860249,25498575.218673404 6679746.054074359,25498574.783128276
6679742.375194377,25498574.382929 6679738.692301761,25498574.01811248
6679735.005736099,25498573.68871235 6679731.315837314,25498573.394758984
6679727.622945643,25498615.249195762 6679712.917382107,25498649.317714863
6679749.110582217,25498629.859234665 6679763.425791496,25498626.597285368
6679765.4664939325,25498616.53215853 6679754.940559511,25498616.475998268
6679754.899373339,25498616.40912013 6679754.879941631,25498616.33963356
6679754.884620618,25498577.925067347 6679764.376426865))', 3879)
    ) AS dist

Have you encountered this issue before and is there an ongoing development
that will address this?

Kind regards,
Juho
*Gispo Finland Ltd.*
*https://www.gispo.fi/ <https://www.gispo.fi/>*
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