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1. 100 Foot Contours - 500k: State of Iowa

2020. Iowa Department of Natural Resources. This map service depicts 2-foot contours, derived from the Iowa LiDAR dataset.

2. 1930 Imagery: Linn County, Iowa

1930. Linn County Iowa GIS. This web map contains the separate services listed below in order to create an imagery base map.Esri World Imagery. ?For details, see the note abou...

3. 1950 Imagery: Linn County, Iowa

1950. Linn County Iowa GIS. State of Iowa imagery collected circa 1950. Imagery has been clipped to Linn County, Iowa.

4. 1960 Imagery: Linn County, Iowa

1960. Linn County Iowa GIS. State of Iowa imagery collected circa 1960. Imagery has been clipped to Linn County, Iowa.

5. 1970 Imagery: Linn County, Iowa

1970. Linn County Iowa GIS. State of Iowa imagery collected circa 1970. Imagery has been clipped to Linn County, Iowa.

6. 1980 Imagery: Linn County, Iowa

1980. Linn County Iowa GIS. State of Iowa imagery collected circa 1980. Imagery has been clipped to Linn County, Iowa.

7. 1990 Imagery: Linn County, Iowa

1990. Linn County Iowa GIS. State of Iowa imagery collected circa 1990. Imagery has been clipped to Linn County, Iowa.

8. 5 Year Program Highway: Iowa

2020. Iowa Department of Transportation. The Iowa Highway Five Year Improvement Program.Iowa Highway Five Year Improvement Program with amendments. Created in June 2018.

9. 5 Year Program Highway: Iowa

2021. Iowa Department of Transportation. The Iowa Highway Five Year Improvement Program with amendments. Created in June 2018.

10. 5 Year Program Structure: Iowa

2020. Iowa Department of Transportation. Iowa Highway Five Year Improvement Program with amendments for structures only. Created in June 2018.

11. 5 Year Program Structure: Iowa

2021. Iowa Department of Transportation. Iowa Highway Five Year Improvement Program with amendments for structures only. Created in June 2018.

12. 511: Illinois Flooding: Iowa

Iowa Department of Transportation.

13. 511: Illinois (Line) Flooding: Iowa

Iowa Department of Transportation.

14. 511 Traveler Information Events - Iowa Critical Closures: Iowa

Iowa Department of Transportation. Service built for TrackaPlow that contains optimized CARS511 services. - Priority 1 events (closures only).

15. 511 Traveler Information Events - Nebraska: Iowa

2020. 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. Iowa DOT does not take...

16. A map of a portion of the Indian country lying east and west of the Mississippi River to the forty sixth degree of north latitude from personal observation made in the autumn of 1835 and recent authentic documents.

1836. Featherstonhaugh, George William, 1780-1866. 22 cm.);Printed by Gales and Seaton, 1835. (97 p., [1] folded leaf of plates : ill.;1 map;67 x 96 cm.;1:1,013,760 or 16 miles to 1 inch.

17. Above Ground Storage Tank Facility: Iowa

2020. Iowa Department of Natural Resources.

18. Accumulation by Time: Iowa

Iowa Department of Transportation. This service is available to all ArcGIS Online users with organizational accounts. For more information on this service, including the terms of use...

19. Active Digital Message Signs: Iowa

Iowa Department of Transportation. Iowa Department of Transportation's Intelligent Transportation System (ITS) Digital Message Signs (DMS) devices.

20. Actual Pending ROW: State of Iowa

2020. Iowa Department of Transportation. Right of Way parcels that are in the process of being purchased, but are not yet owned by the Iowa DOT.

21. Actual Possession ROW: State of Iowa

2020. Iowa Department of Transportation. Newly acquired Right of Ways owned by Iowa DOT.

22. Address Point: Linn County, Iowa

Linn County Iowa GIS. This feature layer contains Linn County address points. This information is maintained by the Real Estate department within the Auditor's Office. S...

23. Adopt-A-Highway Status - Adopted: State of Iowa

2019. 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...

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

2020. 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...

25. Adopt-A-Highway Status: Adopted: State of Iowa

2020. 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...

26. Adopt-A-Highway Status (Adopted): State of Iowa

2020. 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...

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

2020. 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...

28. Adopt-A-Highway Status: Never Adoptable: State of Iowa

2020. Iowa Department of Transportation. A visual representation of the currently adopted sections of highway in Iowa. Additionally, this map displays the sections of highway that are neve...

29. Adopt-A-Highway Status (Never Adoptable): State of Iowa

2020. 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...

30. Adult Correctional Facilities: Iowa

2015. Legislative Services Agency. Iowa Adult Correctional Facilities.

31. Aerial Photo Counties: Iowa, 2016

2016. These county-wide datasets have been up-sampled to a one-meter-resolution raster, in jp2 format.

32. Aerial Photography Counties: Iowa, 1930s

1930. Iowa Department of Natural Resources. 1930s Aerial Photography of Iowa County dataset in a zipped file.

33. Aerial Photography Counties: Iowa, 1950s

1950. Iowa Department of Natural Resources. 1950s Aerial Photography of Iowa County dataset in a zipped file.

34. Aerial Photography Counties: Iowa, 1960s

1960. Iowa Department of Natural Resources. 1960s Aerial Photography of Iowa County Dataset in a zipped file.

35. Aerial Photography Counties: Iowa, 1970s

1970. Iowa Department of Natural Resources. 1970s Aerial Photography of Iowa Each zip file contains a county raster dataset.

36. Aerial Photography Dates File: Iowa, 1930s

1930. Iowa Department of Natural Resources. This file contains a shapefile of the centroids of individual scanned photos, and the associated date.

37. Aerial Photography Dates: Iowa, 1950s

1950. Iowa Department of Natural Resources. Zipped file Contains a dateset of the centroids, with dates, of the individual images used.

38. Aerial Photography Dates: Iowa, 1960s

1960. Iowa Department of Natural Resources. This dataset is centroids with dates of the individual images used.

39. Aerial Photography Dates: Iowa, 1970s

1970. Iowa Department of Natural Resources. This shapefile has centroids with dates of all images used in this dataset.

40. Agricultural Districts: Iowa

2015. Legislative Services Agency. Iowa Agricultural Districts.

41. Agricultural Drainage Wells: Iowa

2017. Iowa Department of Natural Resources. Agricultural Drainage Wells in Iowa Wells and intakes.

42. Air Emission Points: Iowa

2020. Iowa Department of Natural Resources.

43. Air Facilities: Iowa

2020. Iowa Department of Natural Resources.

44. Air Facilities: Iowa

2018. Iowa Department of Natural Resources. Facilities with operating permits for Title V of the Federal Clean Air Act, as well as facilities required to submit an air emissions inventory, an...

45. Airport Approach Surface Precision: Iowa

2020. 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...

46. Airport Approach Surface Precision: State of Iowa

2019. 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...

47. Airport Approach Surfaces: Iowa

2020. 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...

48. Airport Conical Surface: Iowa

2020. 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'.

49. Airport Conical Surface: State of Iowa

2019. 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 .

50. Airport Horizontal Surface: Iowa

2020. 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...

51. Airport: Linn County, Iowa

Linn County Iowa GIS. This feature layer contains Linn County, Iowa airports.Feature Layer DetailsUpdate Frequency: As neededFeature Class Coordinate System: NAD 1983 Io...

52. Airport Locations: Iowa

2020. Iowa Department of Transportation. Airport locations and information in Iowa including contact information, location details and more.

53. Airport Primary Surface: Iowa

2020. 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...

54. Airport Runway: Iowa

2020. Iowa Department of Transportation. Airport runway locations and information in Iowa including contact information, location details and more.

55. Airport Transitional Surface: Iowa

2020. Iowa Department of Transportation. The transitional surface extends outward and upward at right angles to the primary and approach surfaces at a slope of 7:1.

56. Airport Transitional Surface Precision: Iowa

2020. Iowa Department of Transportation. The transitional surface extends outward and upward at right angles to the primary and approach surfaces at a slope of 7:1.

57. All Disaster Declarations: Iowa

2019. Iowa Department of Transportation. Contains all active disaster declarations for all of Iowa's 99 counties (both federal and state). Data is manually updated once a proclamation is i...

58. All Environmental Facilities (Areas): Iowa

2020. Iowa Department of Natural Resources.

59. All Environmental Facilities: Iowa

2020. Iowa Department of Natural Resources.

60. All Environmental Facilities (Lines): Iowa

2020. Iowa Department of Natural Resources.

61. All Registered Wells in the State of Iowa

2018. Iowa Department of Natural Resources. All Registered Wells in the State of Iowa This zipfile contains a shapefile of the All Wells dataset.

62. All Restricted: Iowa

Iowa Department of Transportation. Displays all counties in the state of Iowa color coded according to All Systems Permit restictions. Check with local officials when traveling on co...

63. All Routes: Iowa

2020. Iowa Department of Transportation. Information about all routes in the State of Iowa including Federal, State, County, Municipal, Institutional and Ramp systems. Data is maintained i...

64. All Routes: Iowa

2020. Iowa Department of Transportation. Information about all routes in the State of Iowa including Federal, State, County, Municipal, Institutional and Ramp systems. Data is maintained i...

65. All Routes: State of Iowa

2020. Iowa Department of Transportation. Information about all routes in the State of Iowa including Federal, State, County, Municipal, Institutional and Ramp systems. Data is maintained i...

66. All Wells: Iowa

2020. Iowa Department of Natural Resources.

67. Alt1 Alignment: Iowa

Iowa Department of Transportation. This is the map file with all alignments and resources.

68. Alt2 Alignment: Iowa

Iowa Department of Transportation. This is the map file with all alignments and resources.

69. Alt2 Levee Agricultural: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

70. Alt2 Levee Agricultural: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

71. Alt2 Levee Archy Sites: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

72. Alt2 Levee Bridges: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

73. Alt2 Levee Bridges: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

74. Alt2 Levee Bridges: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area ONLY (no resources) for CP 3 Missouri Valley U.S. 30 bypass.

75. Alt2 Levee Businesses: Iowa

Iowa Department of Transportation. Hosted service with houses for alternative 2 for CP 3 Missouri Valley U.S. 30 bypass.

76. Alt2 Levee Businesses: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

77. Alt2 Levee Cemeteries: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

78. Alt2 Levee Churches: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

79. Alt2 Levee Commercial: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

80. Alt2 Levee Commercial: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

81. Alt2 Levee County Parcels: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

82. Alt2 Levee Floodplains dt: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

83. Alt2 Levee Floodplains dt: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

84. Alt2 Levee Granular: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

85. Alt2 Levee Granular: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area ONLY (no resources) for CP 3 Missouri Valley U.S. 30 bypass.

86. Alt2 Levee Granular: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

87. Alt2 Levee Groundline Intercept: Iowa

Iowa Department of Transportation. Hosted service with study area for CP 3 Missouri Valley U.S. 30 bypass.

88. Alt2 Levee Groundline Intercept: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

89. Alt2 Levee Groundline Intercept: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

90. Alt2 Levee Houses: Iowa

Iowa Department of Transportation. Hosted service with houses for alternative 2 for CP 3 Missouri Valley U.S. 30 bypass.

91. Alt2 Levee Impact Area: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area ONLY (no resources) for CP 3 Missouri Valley U.S. 30 bypass.

92. Alt2 Levee Impact Area: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

93. Alt2 Levee Impact Area: Iowa

Iowa Department of Transportation. Hosted service with houses for alternative 2 for CP 3 Missouri Valley U.S. 30 bypass.

94. Alt2 Levee Impact Area: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

95. Alt2 Levee Loess Hills: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

96. Alt2 Levee Loess Hills: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

97. Alt2 Levee Loess Hills Special Landscape Areas: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

98. Alt2 Levee Pavement: Iowa

Iowa Department of Transportation. Hosted service for alternative 2 with levee for CP 3 Missouri Valley U.S. 30 bypass.

99. Alt2 Levee Pavement: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area for CP 3 Missouri Valley U.S. 30 bypass.

100. Alt2 Levee Pavement: Iowa

Iowa Department of Transportation. Hosted service with all alternatives and study area ONLY (no resources) for CP 3 Missouri Valley U.S. 30 bypass.