mptangtang

> If you want usable help, we will the full source code. The best would be a [Short, Self Contained, Correct (Compilable), Example](http://www.sscce.org/). Thank you very much! Since the polygon...

Another error example on polygon join operation. ``` POLYGON((5.25009 53.2746,5.25009 4.14793,41.4815 4.14793,41.4815 53.2746,5.25009 53.2746),(10.2501 29.3175,36.4815 48.2746,28.9115 12.9149,24.9149 12.7517,10.2501 29.3175),(24.9149 12.7517,28.0348 9.87658,28.9115 12.9149,28.1051 9.14793,24.9149 12.7517)) POLYGON((21.5175 22.9679,19.3181 19.074,24.0593 13.8279,29.053 13.5755,25.9523 23.5448))...

I have roughly drawn the figure of the problem. The error comes from filling the hollow part with new polygon. In my problem, all the polygons are designed to be...