Backend visualization does scale to +100 qubits

[1ucian0]

Environment

• Qiskit Terra version: 0.25
• Python version: 3.9.16

What is happening?

Coupling maps of "big" backends (over 100 qubits) do not render well.

How can we reproduce the issue?

Take the example of IBM's ibm_washington, which has 127 qubits

from qiskit_ibm_provider import IBMProvider
from qiskit.visualization import plot_gate_map

backend = IBMProvider().get_backend('ibm_washington')
print(backend.num_qubits)  # 127
plot_gate_map(backend)

Notice that the qubit nodes with 3-digit numbers are not easy to distinguish.

What should happen?

Having distinguishable numbers when they are large.

Any suggestions?

I see options:

• bigger pictures
• small numbers (that fit in the size of the node)
• no numbers when they are large (hmm... no...)

[mtreinish]

I feel this is a duplicate of #9031 the reason I suggested using graphviz draw from rustworkx is that it can handle large graphs well.

[1ucian0]

My interpretation of #9031 was some form of fallback for qubit_coordinates_map. But true that solving #9031 would fix all of them. So closing as duplicated. Thanks!