在谈到有关开源和全球环境现象时，很难让人联想到地理数据集和GIS应用程序领域。

The realm of geographical data sets and GIS applications may seem a bit difficult to understand in a world that talks about open source and global environmental phenomena.

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列表定义多边形，并可以相互层叠，来表示方向完全相反但描述相同地理区域的数据集，从而形成数据详细的地图。

The lists define polygons and can be layered on top of each other to map data sets of completely different origins while describing the same geographical area to form extremely data-rich maps.

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已经发布的互联数据集覆盖领域广泛，有地理信息、人口资料信息、在线社区、科学出版物、音乐等。

These published data sets cover a wide range of areas such as geographic information, demographic data and information, online communities, scientific publications, and music.

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