Visual Symbols:
* Shading:
* Pros: Easy to see at a glance, can show varying intensity of corn production (lighter shade = less corn).
* Cons: Can be hard to distinguish between adjacent regions, may obscure other map features.
* Hatching:
* Pros: Creates a distinct visual pattern, can be varied for different types of corn (e.g., sweet corn, field corn).
* Cons: Can be visually overwhelming, may not be suitable for maps with many other symbols.
* Color:
* Pros: Can be used to represent different types of corn (e.g., yellow for field corn, green for sweet corn) or different growing seasons.
* Cons: Color blindness may make it difficult for some viewers to interpret.
* Dots:
* Pros: Can show the density of corn production (more dots = more corn).
* Cons: Can be difficult to distinguish between regions with similar densities.
* Icons:
* Pros: Can be highly specific, showing corn stalks, silos, or other agricultural imagery.
* Cons: Can be cluttered if too many icons are used, may not be visually appealing on a small-scale map.
Textual Symbols:
* Labels:
* Pros: Provides clear and concise information about the region.
* Cons: Can be cluttered on a map with many regions.
* Numbers:
* Pros: Can represent data such as corn yield or acreage.
* Cons: May not be visually appealing, can be difficult to interpret without a key.
Additional Considerations:
* Map Scale: Choose symbols that are appropriate for the scale of your map.
* Target Audience: Consider the age and knowledge level of your audience when selecting symbols.
* Map Purpose: The purpose of the map should determine the type of information that is highlighted.
Example:
For a simple map showing major corn-growing regions in the US, you might use a combination of:
* Shading: To highlight the areas with the highest corn production.
* Color: To distinguish between different corn types, if relevant.
* Labels: To identify the major corn-growing states or regions.
Ultimately, the best symbols will depend on your specific map goals and desired aesthetics.
