城市紫线

然后分别针对城市紫线划定的各层次对象保护范围的影响因素和保护内容，制定划定方法与保护措施，构建城市紫线体系。

And then , accord to the influencing factors and protection contents of protection area of each objects , make protection methods and measures to establish the purple line planning system .

最后从城市紫线划定的管理主体、管理法规、管理措施（包括运营机构、公众参与、成果规范）入手，探讨城市紫线的管理机制。

In the end , study on management subject , management regulations and management mechanism ( including operation organization , public participation and of standard for results ), and explore the management mechanism of purple line planning .

为此，原建设部于2004年颁布了《城市紫线管理办法》，推进历史文化遗产保护范围法制化建设，加大历史文化遗产的保护力度。

Basing on the legalization construction of protection area of historical and cultural heritage , the ministry of Construction promulgated purple line planning management method in 2004 , in order to strengthen the conservation of historical and cultural heritages .