Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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1. 511 Events: Nebraska

2016. Iowa Department of Transportation. Current 511 Events for Nebraska. This layer is updated every 10 minutes. This layer is provided as a courtesy from Iowa DOT for use by Iowa DOT web...

2. 511 IA Road Conditions: Iowa

2016. Iowa Department of Transportation. Iowa Winter Road Conditions. Conditions are updated every 10 minutes during the winter season (October 15 to April 15) and on an as-needed basis du...

3. 511 Non-Iowa Road Conditions

2017. Iowa Department of Transportation. Surrounding States: Feature Collection or Feature Service Conditions are updated every 10 minutes during the winter season (October 15 to April 15)...

4. Abandoned Rail Lines: Iowa

2017. Iowa Department of Transportation. This layer depicts abandoned rail lines in Iowa.

5. Access Control to the Primary Highway System: Iowa

2016. Iowa Department of Transportation. The Iowa DOT has established an access management policy to control access to the Primary Highway System. This layer depicts all non-Priority 1 cla...

6. Active: Iowa

2015. Iowa Department of Transportation. Iowa Department of Transportation's Intelligent Transportation System (ITS) Digital Message Signs (DMS) devices.Layer and service is maintained by ...

7. Active Rail Lines: Iowa

2017. Iowa Department of Transportation. This layer depicts the current active rail lines for the State of Iowa.

8. Adopt-A-Highway Status: Adopted: Iowa

2016. Iowa Department of Transportation. This layer displays all of the currently adopted Iowa Highway segments as related to the Adopt-A-Highway program. These layers were developed for u...

9. Adopt-A-Highway Status: Never Adoptable: Iowa

2016. Iowa Department of Transportation. This layer represents the sections of highway which are never available for adoption within the Adopt-A-Highway program. This symbolization was dev...

10. Aerial Imagery: Iowa, 2016

2016. Iowa Homeland Security and Emergency Management. This aerial imagery was flown in the spring of 2016 over the eastern part of the state. it is four-band imagery that includes the near-infra-red ba...

11. Aerial Photography: Iowa, 1930s

1930. Iowa DNR. This dataset represents panchromatic orthophoto imagery produced from black and white aerial photographs. This dataset was developed from individua...

12. Aerial Photography: Iowa, 1950s

1950. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

13. Aerial Photography: Iowa, 1960s

1960. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

14. Aerial Photography: Iowa, 1970s

1970. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

15. Agricultural Drainage Wells: Iowa

2017. This geospatial shapefile depicts the locations, functionality, owners and other observered characteristics of Agricultural Drainage Wells in the S...

16. Airport Part 77 Surfaces - Approach: Iowa

2016. Iowa Department of Transportation. The approach surface is longitudinally centered on the extended runway centerline and extends outward and upward from each end of the primary surfa...

17. Airport Part 77 Surfaces - Approach (Precision): Iowa

2016. Iowa Department of Transportation. The approach surface is longitudinally centered on the extended runway centerline and extends outward and upward from each end of the primary surfa...

18. Airport Part 77 Surfaces - Conical: Iowa

2016. Iowa Department of Transportation. The Conical surface extends outwards and upwards from the boundary of the horizontal surface at a slope of 20:1 for a horizontal distance of 4,000 .

19. Airport Part 77 Surfaces - Horizontal: Iowa

2016. Iowa Department of Transportation. The Horizontal surface is a plane 150 above the established airport elevation. The perimeter of which is constructed by swinging arcs of specified ...

20. Airport Part 77 Surfaces - Primary: Iowa

2016. Iowa Department of Transportation. The Primary surface extends 200 feet beyond each end of the runway, but when the runway has no specially prepared hard surface, the surface ends at...