There are eleven general categories (listed below) into which the DNR digital themes are organized. A theme is a descriptive name given to a coverage or data set. All themes (for example, "Detailed Soils of Franklin County") fall under one or more of the following categories. Themes can be selected by category and/or county from the selection boxes below.

Administrative:	Describes features related to administrative, governmental or regulatory boundaries.
Biologic:	Describes features related to plants, animals and other living entities.
Cadastral:	Describes a boundary that is related to the land fabric, such as parcel ownership.
Demographic:	Describes information primarily related to human population dynamics and activities.
Geologic/Soils:	Describes surfacial or subsurface features of the terrain. Included in this category is information on soils, oil and gas, and mineral resources.
Hydrologic:	Describes features that relate to water, including surface and ground water and precipitation.
Bathymetry:	Describes information related to depth, such as contour maps.
Land Use/ Land Cover:	Describes features whose primary significance is to what extent they cover the surface of the earth.
Recreational:	Recreational areas include parks, boating areas, wildlife areas, nature preserves, historic sites, etc.
Topographic:	Describes information related to elevation, such as digital elevation models and contour maps.
Transportation/ Infrastructure:	Describes features primarily related to transportation routes and utility systems, such as roads, railways or electric transmission lines.