Examples with LengthIndexedLine org.locationtech.jts.linearref.LengthIndexedLine used on opensource projects

Example 1 with LengthIndexedLine

use of org.locationtech.jts.linearref.LengthIndexedLine in project presto by prestodb.

the class GeoFunctions method lineLocatePoint.

@SqlNullable
@Description("Returns a float between 0 and 1 representing the location of the closest point on the LineString to the given Point, as a fraction of total 2d line length.")
@ScalarFunction("line_locate_point")
@SqlType(DOUBLE)
public static Double lineLocatePoint(@SqlType(GEOMETRY_TYPE_NAME) Slice lineSlice, @SqlType(GEOMETRY_TYPE_NAME) Slice pointSlice) {
    Geometry line = deserialize(lineSlice);
    Geometry point = deserialize(pointSlice);
    if (line.isEmpty() || point.isEmpty()) {
        return null;
    }
    GeometryType lineType = GeometryType.getForJtsGeometryType(line.getGeometryType());
    if (lineType != GeometryType.LINE_STRING && lineType != GeometryType.MULTI_LINE_STRING) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, format("First argument to line_locate_point must be a LineString or a MultiLineString. Got: %s", line.getGeometryType()));
    }
    GeometryType pointType = GeometryType.getForJtsGeometryType(point.getGeometryType());
    if (pointType != GeometryType.POINT) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, format("Second argument to line_locate_point must be a Point. Got: %s", point.getGeometryType()));
    }
    return new LengthIndexedLine(line).indexOf(point.getCoordinate()) / line.getLength();
}

Example 2 with LengthIndexedLine

use of org.locationtech.jts.linearref.LengthIndexedLine in project presto by prestodb.

the class GeoFunctions method lineInterpolatePoint.

@Description("Returns the point in the line at the fractional length.")
@ScalarFunction("line_interpolate_point")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice lineInterpolatePoint(@SqlType(GEOMETRY_TYPE_NAME) Slice lineSlice, @SqlType(DOUBLE) double fraction) {
    if (!(0.0 <= fraction && fraction <= 1.0)) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, format("line_interpolate_point: Fraction must be between 0 and 1, but is %s", fraction));
    }
    Geometry geometry = deserialize(lineSlice);
    validateType("line_interpolate_point", geometry, ImmutableSet.of(LINE_STRING));
    LineString line = (LineString) geometry;
    if (line.isEmpty()) {
        return serialize(createJtsEmptyPoint());
    }
    org.locationtech.jts.geom.Coordinate coordinate = new LengthIndexedLine(line).extractPoint(fraction * line.getLength());
    return serialize(createJtsPoint(coordinate));
}