Main structure: Settlements, windmills
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资源简介：
Traditional windmills have great visual and spatial importance. Therefore, they are included as a separate object. The province of Zuid-Holland has a protective policy for the environment of these windmills (the so-called mill biotope). See the Space Ordinance (Article 2.3.5 Protection of mill biotope). A number of points have been changed in accordance with environmental policy.
