Tag Archives: Gregg Hadish

Day 5 GAW: Have you discovered the Iowa Geographic Map Server?

By Education, Geography Awareness Week, Imagery, Iowa Geographic Map Server, Observation, Remote Sensing, , , , , , , , , , , , , , ,

The Iowa Geographic Map Server is a gem of historical and contemporary statewide aerial imagery for Iowa from the 1930s to 2021. It also has many other statewide layers including:

  • elevation maps (LiDAR and USGS topographic maps),
  • historical maps (General Land Office survey maps from 1800s, Andreas Atlas, historic topography),
  • land cover maps (historical and contemporary)
  • geology (landforms and bedrock)

Here’s your challenge: Zoom into your city or a place of significance to you and discover how it has changed over the years, look at how the land cover changed, challenge yourself to find as many changes as you can.

Interested in learning more about the Iowa Geographic Map Server? Watch Gregg Hadish’s recent presentation, “Accessing Iowa Map Services in GIS and Web Applications,” for the Iowa Geographic Information Council September 2023 Lunch and Learn professional development series.

Earth Science Week – Day 6: Geologic Map Day

By Earth Science Week 2020, Education, Outreach, , , , , ,

Today we are celebrating Geologic Map Day, to promote awareness of geologic mapping and its importance to society.

Here is a map of the Bedrock Geologic Map of Iowa created by a team at the Iowa Geological and Water Survey. For details about each of the geologic regions click here to read the report.

To view map details click on the map.

Which landform region are you living in?
Find your place on the map and learn more about each of the Iowa Landforms.


Visit the Iowa Landforms Revealed by Gregg Hadish. These images were featured in a series of blog posts on the IowaView website last fall.

Visit the official Geologic Map Day site for learning activities and resources.