Scenario
Geometry (polygons) data plotted in Map Chart with polygon border weight set to zero.
Expected: homogeneous display of polygon.
Reality: discrete polygons still visible.
Please refer to attached .png.
Solution
Per Tibco Support Case #02240977, the polygon border appears due to anti-aliasing.
To implement this feature, Spotfire should expose a way to disable anti-alias for a specific Map layer.