**Explanation:**

The indirect method of contouring is a technique used in surveying to determine the shape of the land surface, particularly in areas with uneven terrain. It involves the use of contour lines, which connect points of equal elevation, to create a contour map.

The indirect method of contouring has several advantages over the direct method, which involves physically measuring the elevation at each point on the ground. These advantages include:

**1. Economy:**
- The indirect method is generally more economical than the direct method because it requires fewer field measurements.
- It relies on the interpolation of elevation values between known points, reducing the need for extensive field work.

**2. Suitability:**
- The indirect method is suitable for areas with complex terrain or limited access.
- It can be used in situations where it is difficult or impractical to measure the elevation at every point on the ground.

**3. Suitability for large projects:**
- The indirect method is particularly well-suited for large projects that cover a wide area.
- It allows for the efficient collection of elevation data over a large extent of land.

However, the indirect method of contouring does have one disadvantage compared to the direct method:

**4. Accuracy:**
- The indirect method may not be as accurate as the direct method because it relies on interpolation and estimation.
- It assumes that the elevation values between known points vary smoothly and continuously, which may not always be the case.
- In areas with abrupt changes in elevation or irregular topography, the indirect method may produce less accurate results.

Therefore, the correct answer is option 'C' - Accuracy. The indirect method of contouring does not have an advantage in terms of accuracy compared to the direct method.