Explanation:

- Option 1: Artist

- Artists are individuals who create visual or conceptual works, using a wide range of mediums such as paint, pencil, or digital tools. They might create works of art, but they don't specifically focus on maps and charts.

- Option 2: Cartographer

- Cartographers specialize in making maps and charts. They use geographic information to create representations of physical spaces.

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- Option 3: Geographer

- Geographers study the Earth's landscapes, environments, and the relationships between people and their environments. While they might use maps, they aren't solely focused on making them.

- Option 4: Sculptor

- Sculptors are artists who create three-dimensional artworks by carving, modeling, or assembling materials like stone, metal, or clay. They don't work on maps and charts either.

The correct one-word substitute for the given group of words is Option 2: Cartographer.