The purpose of this article is to provide for certain uses which cannot be well adjusted to their environment in particular locations with full protection offered to surrounding properties by rigid application of the district regulations. These uses are generally of a public or semipublic character and are essential and desirable for the general convenience and welfare, but because of the nature of the use, the importance of relationship to the Comprehensive Plan, and possible impact, not only on neighboring properties, but on a large section of the Town, require the exercise of planning judgment on location and site plan.