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Convert a temporal point between geography and geometry on the generated surface #70

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Merged
estebanzimanyi merged 1 commit into from
Oct 8, 2026
Merged

Convert a temporal point between geography and geometry on the generated surface #70

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24 changes: 24 additions & 0 deletions src/test/java/org/mobilitydb/spark/GeneratedSurfaceTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -409,6 +409,30 @@ void nxn_array_tgeoarr_udfs() {
"SELECT size(eDwithinPairs(" + p + ", " + p + ", 1000.0))")).intValue());
}

@Test
void point_conversion_between_geography_and_geometry_keeps_the_interpolation() {
// tgeogpoint_to_tgeompoint and tgeompoint_to_tgeogpoint answer what
// tgeompoint(tgeogpoint) and tgeogpoint(tgeompoint) answer in MobilityDB. A linear
// lon/lat trip whose two instants lie west and east of a lon/lat envelope crosses it
// only between them, so the converted trip intersects the envelope when the
// conversion keeps the linear interpolation, and the step trip with the same
// instants does not.
String trip = "tgeogpoint_in('SRID=4326;[POINT(80 -30)@2001-01-01, "
+ "POINT(179 -30)@2001-01-02]')";
String step = "tgeogpoint_in('SRID=4326;Interp=Step;[POINT(80 -30)@2001-01-01, "
+ "POINT(179 -30)@2001-01-02]')";
String box = "SRID=4326;POLYGON((93.41 -60.55,173.34 -60.55,173.34 -8.47,"
+ "93.41 -8.47,93.41 -60.55))";
String geom = "tgeogpoint_to_tgeompoint(" + trip + ")";
assertEquals("Linear", scalar("SELECT temporal_interp(" + geom + ")"));
assertEquals(Boolean.TRUE, scalar("SELECT eIntersects(" + geom + ", '" + box + "')"));
assertEquals(Boolean.FALSE, scalar(
"SELECT eIntersects(tgeogpoint_to_tgeompoint(" + step + "), '" + box + "')"));
// The reverse conversion gives back the trip it started from.
assertEquals(scalar("SELECT tspatial_as_text(" + trip + ", 6)"),
scalar("SELECT tspatial_as_text(tgeompoint_to_tgeogpoint(" + geom + "), 6)"));
}

@Test
void h3_cell_prefilter_surface() {
// The temporal-H3 cell surface (th3index / geoToH3IndexSet / the
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