One method of dream interpretation I have yet to mention is dream drawing and dream mapping. This is a very well know method and appears much in published literature, especially in psychology (they of course have special names for it).
Fantasy worlds can appear often in some peoples dreams. They are new countries ( built by our mind) that some can explore in great detail, and visit every dream they have. They may hold complete accuracy to our world, or be completely the relm of our minds creation. Of course those with such ability are rare. Creating art or a map is something you may decide to do with your dream logging. It’s an helpful tool sometimes as changes in dream landscape and in artwork you produce can reveal changes in your psychological state and even for some become RC triggers.