Ethnic maps of Austria-Hungary always show parts of Northern Czechia as German. Was the German population in those areas really so dominant to justify this?

by arlinconio

Like https://upload.wikimedia.org/wikipedia/commons/9/92/Austria_hungary_1911.jpg for example

henry_fords_ghost

Please don’t just post a link to the Wikipedia page for the Sudetenland, people! AskHistorians requires in-depth and comprehensive answers.