No identifiable LGBTQ+ characters or themes are present in 'Northwest of USA' based on the information provided. Therefore, no specific portrayal or net impact can be evaluated.

No identifiable transsexual characters or themes are present in the film, as no information regarding its content was provided for analysis. Therefore, an evaluation of its portrayal is not applicable.

The movie does not contain any action or adventure elements.

The provided film title '{Northwest of USA}' (1945) does not correspond to a known movie, preventing any analysis of its characters or source material to determine the presence of gender swaps.

The provided title "{Northwest of USA}" (1945) does not correspond to a known film. Without a specific film and its associated characters or source material, it is impossible to establish a canonical or historical race for any character, thus precluding the identification of a race swap.