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.
    Describes features primarily related to transportation routes and utility systems, such as roads, railways or electric transmission lines.