Category Archives: IowaLandformsRevealed

Loess Hills: Iowa Landforms Revealed

By Education, Imagery, IowaLandformsRevealed, Outreach, , , ,

Obscured from view by vegetation and built structures, Iowa’s often subtle landforms are revealed through a LiDAR-derived bare earth digital elevation model in a Geographic Information System. Geological and human made features can be seen in this series of LiDAR color hillshade maps from across the State.

Loess

Deep deposits of wind-blown silt define the Loess Hills region of western Iowa. Intricate drainage networks and agricultural terraces are visible in this map from along the West Nishnabotna River near Hamburg.

Click on image to explore.
This image is of part of the Loess Hills in southwest Iowa.

Algona Moraine: Iowa Landforms Revealed

By Imagery, IowaLandformsRevealed, Outreach, , , ,

Obscured from view by vegetation and built structures, Iowa’s often subtle landforms are revealed through a LiDAR-derived bare earth digital elevation model in a Geographic Information System. Geological and human made features can be seen in this series of LiDAR color hillshade maps from across the State.

Algona

The elevated curved features in this map are glacial moraines deposited during the most recent period of glaciation in north-central Iowa. The largest in this view is called the Algona Moraine.

The Algona Moraine is located in north central Iowa.

    Oneota River Valley: Iowa Landforms Revealed

    By Imagery, IowaLandformsRevealed, Outreach, , , ,

    Obscured from view by vegetation and built structures, Iowa’s often subtle landforms are revealed through a LiDAR-derived bare earth digital elevation model in a Geographic Information System. Geological and human made features can be seen in this series of LiDAR color hillshade maps from across the State.

    Oneota

    Originally called the Oneota, the central river feature in this map is the Upper Iowa River. The well-defined drainage features are characteristic of the Driftless area of northeast Iowa.

    Click on the image to explore in detail.
    The Oneota River Valley is located in northeastern Iowa.

    Paha Ridges: Iowa Landforms Revealed

    By Imagery, IowaLandformsRevealed, Outreach, ,

    Obscured from view by vegetation and built structures, Iowa’s often subtle landforms are revealed through a LiDAR-derived bare earth digital elevation model in a Geographic Information System. Geological and human made features can be seen in this series of LiDAR color hillshade maps from across the State.

    Paha

    The elevated linear ridges in this map are erosional geological features called Paha and are found primarily in east-central Iowa along major river valleys.

    The Paha ridges are found in east-central Iowa.

    Introducing Iowa Landforms Revealed

    By Imagery, IowaLandformsRevealed, Outreach, , , ,

    This spring, Gregg Hadish of USDA Natural Resource Conservation Service and staff member of ISU GIS Facility put together a series of images called Iowa Landforms Revealed. The project looks at Iowa geological features using LiDAR. Gregg also used interesting color ramps to give these images an artistic component, inspired by the USGS Earth as Art project. The initial project includes a series of 4 images which debuted at the Iowa Technology And Geospatial (ITAG) Conference in West Des Moines, Iowa, this summer. We will be highlighting each image over the next several weeks as a special series feature on the IowaView blog. Please feel free to leave comments or suggestion for future landforms for us to explore.