1.google和有道的翻译都是错的,语法混乱,用词不当.
正确的说法请参考：
The urban landscape is,colloquially,a kind of painting whose subject is the cityscape.
2.语法仍然混乱.
正确的说法请参考：
Posters are a kind of painting that is to publicize,agitate and creat an atmosphere of public opinions.
绝对没错,请放心参考.