The access pattern to read the shapefile is not very favored by CD-ROM drives and, therefore, the whole operation slows down dramatically.
CD - ROM驱动器不是很适合读shapefile文件的访问模式，因此整个操作的速度会急剧降慢。
The access pattern to read the shapefile is not very favored by CD-ROM drives and, therefore, the whole operation slows down dramatically.
CD - ROM驱动器不是很适合读shapefile文件的访问模式，因此整个操作的速度会急剧降慢。
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