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Accumulation by Time: Iowa 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...

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Active Digital Message Signs: Iowa iowa

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

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Actual Possession ROW: Iowa iowa

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

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Aerial Oblique (CAP): Iowa iowa

Iowa Department of Transportation. Aerial Oblique Photo Points from the Civil Air Patrol.

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Aerial Photography Dates: Iowa, 1950s iowa

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

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Aerial Photography Dates: Iowa, 1960s iowa

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

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Aerial Photography Dates: Iowa, 1970s iowa

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