Concept:
Cadastral maps are large-scale maps prepared to show property boundaries, land parcels, and ownership details with high accuracy.
Step 1: Recall the typical scale.
Cadastral maps are generally prepared at scales ranging from
\[
\boxed{1:500 \text{ to } 1:10000.}
\]
Step 2: Choose the correct option.
Hence,
\[
\boxed{\text{The scale of cadastral maps is }1:500\text{ to }1:10000.}
\]
Therefore, the correct option is
\[
\boxed{(C).}
\]