Feature data providers that do not support circular arcs create segmented lines to simulate the curves of an arc. This is called tessellation. The degree of tessellation determines how accurate the displayed curve will be (how close it will approximate the mathematical “true” curve) and how much performance overhead is required to generate the graphics for a curve. You can specify the arc-chord distance, which determines the density of the segmented lines for such providers. The lower the arc segmentation value, the more line segments are used to create the arc (which makes the arc more precise).

Tessellation of arc being part of the polygonal boundary

GeoView enables following curve tessellation customization:

- Maximum spacing - is the maximum allowable chord length during the interpolation of the arcs. Maximum curve tessellation spacing value is expressed using default linear units.
- Maximum offset - is the maximum mid-ordinate (crown) distance of the chord that is allowable during the arc interpolation. The crown distance is the distance from the midpoint of the chord to the arc. Maximum curve tessellation offset value is expressed using default linear units.