Question: Where did The Road to Oz characters, sky princess Polychrome and Dorothy Gale meet?

Context paragraphs:
Winkie Country: The Winkie Country is the Western region of the fictional Land of Oz in L. Frank Baum's classic series of Oz books, first introduced in "The Wonderful Wizard of Oz" (1900).  The Winkie Country is in the West, noted by later being ruled by the Wicked Witch of the West.  This quadrant is strictly distinguished by the color yellow.  This color is worn by most of the native inhabitants called the Winkies and predominates in the local surroundings.  The Winkies are relatively normal in appearance with the exception of their yellow-tinted skin.  Tin abounds there and it is said that the Winkies are some of the most skillful tinsmiths in the world.  This was the country once ruled by the malevolent Wicked Witch of the West before Dorothy Gale "melted" her with a bucket of water, as narrated in "The Wonderful Wizard of Oz".  After that, the Winkies asked the Tin Woodman to be their new monarch ruler which he gladly accepted.  He now lives in a vast palace made of tin that his loyal subjects built in his honor as a present for their new tin King.

Return to Oz: Return to Oz is a 1985 fantasy adventure film directed and written by Walter Murch, an editor and sound designer, co-written by Gill Dennis and produced by Paul Maslansky.  It stars Nicol Williamson as the Nome King, Jean Marsh as Princess Mombi, Piper Laurie as Aunt Em, Matt Clark as Uncle Henry and introduces Fairuza Balk as Dorothy Gale.  It is loosely based on L. Frank Baum's "Oz" novels, mainly "The Marvelous Land of Oz" (1904) and "Ozma of Oz" (1907), yet is set six months after the events of the first novel, "The Wonderful Wizard of Oz" (1900) took place.  Although it is not a sequel and unrelated to the 1939 Metro-Goldwyn-Mayer film, "The Wizard of Oz", it borrows a few elements of it such as the ruby slippers.

The Emerald City of Oz: The Emerald City of Oz is the sixth of L. Frank Baum's fourteen Land of Oz books.  It was also adapted into a Canadian animated film in 1987.  Originally published on July 20, 1910, it is the story of Dorothy Gale and her Uncle Henry and Aunt Em coming to live in Oz permanently.  While they are toured through the Quadling Country, the Nome King is assembling allies for an invasion of Oz.  This is the first time in the Oz series that Baum made use of double plots for one of the books.

Lost Girls: Lost Girls is a graphic novel written by Alan Moore and illustrated by Melinda Gebbie, depicting the sexually explicit adventures of three female fictional characters of the late 19th and early 20th century: Alice from Lewis Carroll's "Alice's Adventures in Wonderland" and "Through the Looking-Glass", Dorothy Gale from L. Frank Baum's "The Wonderful Wizard of Oz", and Wendy Darling from J. M. Barrie's "Peter and Wendy".  They meet as adults in 1913 and describe and share some of their erotic adventures with each other.

Aunt Em: Aunt Em is a fictional character from the Oz books.  She is the aunt of Dorothy Gale and wife of Uncle Henry, and lives together with them on a farm in Kansas.  In "The Wonderful Wizard of Oz", she is described as having been a "young, pretty wife" when she arrived at Uncle Henry's farm, but having been "grayed" by her life there, implying that she appears older than one might expect from her chronological age.  Baum tells us that when Dorothy first came to live with her, Em would "scream and press her hand upon her heart" when startled by Dorothy's laughter, and she appears emotionally distant to her at the beginning of the story.  However, after Dorothy is restored to her at the end of the book, we see her true nature: she cries out, "My darling child!"  and covers her with kisses.

Munchkin: The Munchkins are the natives of the fictional Munchkin Country in the Oz books by American author L. Frank Baum.  They first appear in the classic children's novel "The Wonderful Wizard of Oz" (1900).  They are described as only wearing shades of blue clothing, as blue is the Munchkins' favorite color, and the predominating color that officially represents the eastern quadrant in the Land of Oz.  They and the non-Munchkin Good Witch of the North who accompanies them upon Dorothy Gale's first arrival in Oz, are described as being the same height as Dorothy, who is hinted to be no older than twelve years old.

Polychrome (Oz): Polychrome is a cloud fairy and the youngest daughter of the Rainbow, thus she is a "sky princess".  She first appears in "The Road to Oz" (1909), which is the fifth book of the original fourteen Oz books by American author by L. Frank Baum.  She also appears several times in later Oz stories of the classic series, and has a titular role in the modern sequel "Polychrome: A Romantic Fantasy" by Ryk E. Spoor.

The Road to Oz: The Road to Oz: In Which Is Related How Dorothy Gale of Kansas, The Shaggy Man, Button Bright, and Polychrome the Rainbow's Daughter Met on an Enchanted Road and Followed it All the Way to the Marvelous Land of Oz.  is the fifth of L. Frank Baum's Land of Oz books.  It was originally published on July 10, 1909 and documents the adventures of Dorothy Gale's fourth visit to the Land of Oz.

List of published Oz apocrypha: This page is a supplement to List of Oz books featuring published books, often by small publishing houses.  Their canonicity is up to the individual reader, with some purists considering them apocryphal.  As the Baum Oz books are in the public domain, no clearance needs to be obtained to write and publish fiction about the Oz characters, professionally or otherwise, making the question of canonicity somewhat subjective.  Additionally, both of Jack Snow's Oz books are in the public domain in the United States, as are Ruth Plumly Thompson's "The Royal Book of Oz", "Kabumpo in Oz", "The Wishing Horse of Oz", "Captain Salt in Oz", "Handy Mandy in Oz", "The Silver Princess in Oz", and "Ozoplaning with the Wizard of Oz", making the distinctive elements in those books usable as public domain content.  The most dramatic changes in her books are in "The Lost King of Oz" and "The Giant Horse of Oz", both of which remain protected under U.S. copyright law, and has rendered some known manuscripts unpublishable.  The Oz books of John R. Neill, Rachel R. Cosgrove, and Eloise Jarvis McGraw and her daughter Lauren are all protected under U.S. copyright, making their characters and developments unusable by others without permission.

Dorothy of Oz (book): Dorothy of Oz is a children's novel written by L. Frank Baum's great-grandson Roger S. Baum.  The book details Dorothy Gale returning to the Land of Oz when a Jester has been using the wand of the Wicked Witch of the West (which also contained the ghost of the Wicked Witch of the West) to take over the Land of Oz.  The book was adapted into a film called "" in 2014 by Clarius Entertainment.

Supporting paragraphs: Polychrome (Oz) The Road to Oz
Answer: on an Enchanted Road