Polyline2D calculate distance doesn't work properly

[vocedar]

When I calculating the distance using Polyline2D.distance().

ArrayList<Point2D> listPoint= new ArrayList<>();
listPoint.add(new Point2D(201093.16610711772, 1777477.3696508463)); // UTM Easting and Northing converted from lat,lng
listPoint.add(new Point2D(202667.84818503872, 1777673.8963489647));

Polyline2D polyline = Polyline2D.create(listPoint);
Point2D currentPoint = new Point2D(201926.0433899812, 1777926.9596233366);

double distance = polyline.distance(currentPoint);

Result is not correct.
But when I divided each coordinate by 1000, the result seem correct.
Is there any issue or I just missing somethings?

[dlegland]

Hi,

I think this is an issue...
Comparison of points with close but large coordinates may lead to propagation of uncertainties in computations. I will try to have a look.

[dlegland]

Hi,
I could not reproduce....

I have tried the following code, based on the one you have provided:

    ArrayList<Point2D> listPoint= new ArrayList<>();
    listPoint.add(new Point2D(201093.16610711772, 1777477.3696508463)); 
    listPoint.add(new Point2D(202667.84818503872, 1777673.8963489647));
    Polyline2D polyline = Polyline2D.create(listPoint);
    Point2D currentPoint = new Point2D(201926.0433899812, 1777926.9596233366);
    double dist1 = polyline.distance(currentPoint);
    System.out.println("distance1: " + dist1);
    
    ArrayList<Point2D> listPoint2= new ArrayList<>();
    listPoint2.add(new Point2D(201.09316610711772, 1777.4773696508463));
    listPoint2.add(new Point2D(202.66784818503872, 1777.6738963489647));

    Polyline2D polyline2 = Polyline2D.create(listPoint2);
    Point2D currentPoint2 = new Point2D(201.9260433899812, 1777.9269596233366);
    double dist2 = polyline2.distance(currentPoint2);
    System.out.println("distance2: " + dist2*1000);

I got the following output;

 distance1: 342.98267937936123 
 distance2: 342.9826793794603

Do you have the same?

[vocedar]

Run your code above but I got different results (tried both version 0.11.1 and 0.11.2):

distance1: 783.782734439939
distance2: 342.9826793794603

[dlegland]

Hi,
I have made a new release (0.11.3), to make sure an up-to-date jarfile is provided.

Can you check with this release if you still get the bug?

[vocedar]

I've tested the 0.11.3 version and it work.
Thank you so much.

[dlegland]

Great! I'm glad it finally worked.