Order polygon vertices clockwise ArcGIS Pro

MohamedHassan17

I have a Python script that generates layout and I need to arrange the polygon vertices clockwise Like Image_1

my script to extract polygon vertices not clockwise.

 

def extract_polygon_vertices(feature_layer😞

    results = []

    with arcpy.da.SearchCursor(feature_layer, ["SHAPE@"]) as cursor:

        for row in cursor:

            geom = row[0]

            if geom:

                vertices = [(pnt.X, pnt.Y) for part in geom.getPart() for pnt in part if pnt]

                vertices = order_vertices(vertices) 

                for i in range(len(vertices)):

                    if i > 0 and vertices[i] == vertices[i - 1]:

                        continue

                    pnt1 = vertices[i]

                    pnt2 = vertices[i - 1] if i > 0 else vertices[-1]

                    length = calculate_distance(pnt2, pnt1)

                    results.append((pnt1, pnt2, length))

            else:

                add_error_message("No geometry available.")

    del cursor

    return results

 

 

def order_vertices(vertices😞    

    """

    

    Order the vertices in a clockwise direction starting from the highest Y coordinate.

    """

    if not vertices:

        return []

    ordered_vertices = []

    # Get the highest Y coordinate

    highest_y = max(vertices, key=lambda vertex: vertex[1])

    highest_y_index = vertices.index(highest_y)

    # Check if multiple points have the same highest Y and choose the most left one (smallest X)

    top_points = [v for v in vertices if v[1] == highest_y[1]]

    start_point = min(top_points, key=lambda vertex: vertex[0])

    start_point_index = vertices.index(start_point)

    # Order the points starting from start_point to the end, then from the beginning to start_point

    ordered_vertices = vertices[start_point_index:] + vertices[:start_point_index]

    return ordered_vertices

 

 

Image_2 : the incorrect ouptut

 

danretired

You want the point closest to the left-most top of the extent of the polygon, with

L - smallest X

R - largest X

B - smallest Y

T - largest Y

you want the point with the minimum distance to L,T