Toute l'école culturaliste de l'urbanisme depuis : L'art de Batir les villes 1889 de Camillo Sitte traite l'esthétique de l'environnement urbain , Françoise Choay dans ces textes explique bien cette approche.
Your question is about aesthetic issues applicated to urban environment.
Your problem is able to be explained shortly and lengthy explanation.
Shortly and common sense it is ussually depends on the composition of three elements of urban morpholigy, such as ordering of buildings (as primary element of architecture of the city - Aldo Rossi); ordering of urban spatial types; and ordering of urban vegetation.
Lengthy explanation should be searched about patterns of local cultural context related to model of the visual observation of people. On the one side we have to explain a very old belief, which was reformulated by Immanuel Kant, Fechner, that beauty is a function of two distinct factors; those are concepts as order, unity, or harmony; and the other is usually understood of complexity, multiplicity, or diversity. Meanwhile, on the other side we have also to validate an aesthetic measurement, such as George Birkhoff (1932) who first transformed aesthetic measurement into a mathematical formula.
That's my answer, may help your problems. Thank you.
In addition to the great comments above I think you should look at parallel sources of philosophy, historical and contemporary urban design and unpack the meaning of both aesthetics and urbanism. The work of Jane Jacobs "The Life and Death of Great American Cities" to cite one of her many books on cities and Lewis Mumford "The City in History" both speak to the multiple layers of cities that create a sense of urbanism. Kevin Lynch "The Image of the City" and "Good City Form", Edmond Bacon "The Design of Cities" and Leonardo Benevolo "The Architecture of the Renaissance, Volumes 1 and 2" all focus on aesthetics and the urban environment. One of the best books I have read lately is "Paris Haussman" by Benoit Jallon, Umberto Napolitano and Franck Boutte'. It is a focused case study but refers to contemporary issues in the urban environment. "The Plan of Chicago" by Burnham and Bennett and also Norman Newton's "Design of the Land" speak directly to the connection of landscape and the aesthetics of the urban environment. One of the best essays I have read on aesthetics is the chapter on "Art" in the book "An Essay on Man" by Ernst Cassirer. It speaks to the power of art and aesthetics as transformative both on an intellectual and emotional level.
Another question that is related to your request would be who, or what governs aesthetics in and urban environment, historically and today. That would lead to an interesting study on the forces behind the quality of the development of the urban environment. When we transition from a culture based society to a profit driven society we would question the future of aesthetics and the urban environment.
You might want to take a look at Contemporary Aesthetics. They published a Special Volume to Urban Aesthetics. You'll find it at this link: https://contempaesthetics.org/category/special-volumes/special-volume-8-2020/