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The following convention shall apply in the aviation domain: if the start angle is smaller than the end angle then the arc direction is the direction in which the angle values increase. If the opposite is true, then the arc direction is the one in which the angle values decrease. Depending upon the coordinate system that applies to a given ArcByCenterPoint, this results in a clockwise (left-handed system) or counter-clockwise (right-handed system) directed arc. The arguments for this convention are detailed in Annex Bon theĀ ArcByCenterPoint Interpretation Summary page.
Applied with the EPSG:4326 CRS, this means that arcs are drawn:
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