Questions: How do geographers define 'scale' in the context of spatial analysis? Only the physical size of a region The ratio between the length on a map and the actual distance on Earth The cultural importance of a place The economic value of a region

The answer is the second one: The ratio between the length on a map and the actual distance on Earth.

Explanation for each option:

1. Only the physical size of a region: This is incorrect. While the physical size of a region can be a component of scale, it does not encompass the full definition of scale in spatial analysis.

2. The ratio between the length on a map and the actual distance on Earth: This is correct. In geography, 'scale' often refers to the relationship between a distance on a map and the corresponding distance on the ground. This is a fundamental concept in cartography and spatial analysis.

3. The cultural importance of a place: This is incorrect. Cultural importance is a separate concept and does not define 'scale' in spatial analysis.

4. The economic value of a region: This is incorrect. Economic value is another distinct concept and is not related to the definition of 'scale' in spatial analysis.

In summary, geographers define 'scale' in the context of spatial analysis as the ratio between the length on a map and the actual distance on Earth.