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OverlayEdgeRing: Preserve M values when closing ring #1372

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Merged
dbaston merged 1 commit into from
Jan 13, 2026
+16 −1
Merged

OverlayEdgeRing: Preserve M values when closing ring #1372

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2 changes: 1 addition & 1 deletion src/operation/overlayng/OverlayEdgeRing.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -128,7 +128,7 @@ void
OverlayEdgeRing::closeRing(CoordinateSequence& pts)
{
if(pts.size() > 0) {
pts.add(pts.getAt(0), false);
pts.closeRing(false);
}
}

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15 changes: 15 additions & 0 deletions tests/unit/capi/GEOSGeom_setPrecisionTest.cpp
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Expand Up @@ -326,5 +326,20 @@ void object::test<23>()
checkPrecision(wkt, 100000, "LINESTRING ( 700000 200000, 700000 1400000)");
}

template<>
template<>
void object::test<24>()
{
// https://github.com/libgeos/geos/issues/1365{
set_test_name("M value retained on last point");

input_ = fromWKT("POLYGON ZM ((0 0 0 0, 0 1 1 1, 1 1 2 3, 1 0 4 5, 0 0 6 7))");
expected_ = fromWKT("POLYGON ZM ((0 1 1 1, 1 1 2 3, 1 0 4 5, 0 0 6 7, 0 1 1 1))");

result_ = GEOSGeom_setPrecision(input_, 0.1, 0);

ensure(GEOSEqualsIdentical(result_, expected_));
}

} // namespace tut

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