Labels answer different questions
A congregation might be Protestant by historical branch, evangelical by movement, Reformed-leaning in salvation theology, Baptistic in baptism, non-denominational in formal structure, and continuationist about spiritual gifts. Those descriptions can coexist because they describe different layers.
The atlas keeps each entity type visible. A movement such as evangelicalism is not a denomination; a theological tradition such as Reformed theology can cross denominational lines; and a network does not necessarily govern members like an organized church body.
Ask one more question
When someone says a church is ‘non-denominational,’ you have learned something about formal connection but almost nothing definite about baptism, election, spiritual gifts, Communion, or church authority. Read the church’s own statement and identify each layer separately.