In interpreting and applying the provisions of this ordinance they shall be held to [be] the minimum requirements for the promotion of the public safety, health, convenience, comfort, prosperity, or general welfare. It is not intended by this ordinance to interfere with or abrogate or annul any easements, covenants, or other agreements between parties; provided, however, that where this ordinance imposes a greater restriction upon the use of buildings or premises or upon height of buildings or requires larger open spaces than are imposed or required by other ordinances, rules, regulations or by easements, covenants, or agreements, the provisions of this ordinance shall govern.