Comments (3)
deyihu
commented on June 10, 2024
@roshomon 你的数据我用JTS和GQIS验证过了，其是不符合GeoJSON规范的，你可以自己验证下
- 能被渲染不代表正确，因为渲染利用的奇偶填充，是平面几何里的知识，而GeoJSON是平面几何的子集，是有严格的定义的，可以类比，一个对象可以符合JSON的定义，但是不一定符合GeoJSON的定义
- GeoJSON规范里，一个polygon里holes是不可以相交的，即所有的内环，任何两个都不可相交，更不要说你的数据这种套娃了
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roshomon
commented on June 10, 2024
@deyihu
多谢，试了QGIS的check validity工具，确实数据有错；
示例数据是简化后的，实际生产是从turf.isobands输出的“套娃”， 请问有更好的isobands方法吗，或是分离套娃的方法？
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roshomon
commented on June 10, 2024
@deyihu 多谢，试了QGIS的check validity工具，确实数据有错； 示例数据是简化后的，实际生产是从turf.isobands输出的“套娃”， 请问有更好的isobands方法吗，或是分离套娃的方法？
log下：重写了turf.isobands源码中的groupNestedRings方法，将套环拆分输出到多个多边形
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