Cartographers and photogrammetrists gather geographic and other types of data to create maps and charts.

Cartographers and photogrammetrists create maps. When designing a map, cartographers and photogrammetrists must take into consideration how the map will be used and who will use it. Some maps are designed for legal purposes and others for travel or education. The content and layout of a map help determine specifications such as size, scale, and color.

Cartographers gather and analyze geographic data and design maps based on themes, such as:

• Population density
• Demographic characteristics
• Precipitation patterns

If they are revising an existing map, they double check all the locations and names of places and markers. They also check legal records to determine the boundaries of an area.

Photogrammetrists create maps using photographs taken from airplanes, satellites, and remote sensing systems. They plan aerial surveys to ensure they have covered all the land area for a map. Sometimes they use computers to build 3-D models to help create a map.

Cartographers and photogrammetrists sometimes travel to areas they are mapping in order to identify relevant features. After they decide which data to feature in a map, they figure out details, such as scale and color. They use math formulas to calculate scale. They use drafting tools and computers to draw maps in graphical (paper) or digital format. When a map is complete it is inspected for accuracy.

More cartographers are using GIS (Geographic Information Systems) to perform their work. These systems allow data to be stored and accessed for a variety of purposes such as maps, charts, tables, and reports.

Cartographers and photogrammetrists work with others such as mapping scientists and surveyors.