LSJ
make an elevation (cf. ὀρθογραφία II), ὡς ὀρθογραφεῖται as is shown in the accompanying plan, Apollod. Poliorc. 193.1.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
gerade, recht schreiben (?).
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)