Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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1.
Aerial Photography Counties: Iowa, 1950s

Aerial Photography Counties: Iowa, 1950s

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

2.
Aerial Photography Counties: Iowa, 1960s

Aerial Photography Counties: Iowa, 1960s

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

3.
Aerial Photography Counties: Iowa, 1970s

Aerial Photography Counties: Iowa, 1970s

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

4.
CIR Aerial Photography Counties: Iowa, 1980s

CIR Aerial Photography Counties: Iowa, 1980s

1980. Iowa Department of Natural Resources. 1980s Color-Infra-Red Aerial Photography of Iowa Each zip file contains a County-wide dataset.

5.
Raster

DEM (30m): Wisconsin, 1998

1990-2000. United States Geological Survey and Wisconsin Department of Natural Resources. This Grid-format Digital Elevation Model (DEM) is a raster representation of land elevation of Wisconsin. This DEM ('demgw930') is derived from the...

6.
Digital Elevation Model (DEM) at 1:250,000: Illinois, 2006

Digital Elevation Model (DEM) at 1:250,000: Illinois, 2006

1994. Abert, Curtis C. and Illinois State Geological Survey. This raster dataset consists of edge-matched USGS 1:250,000 DEM tiles for Illinois. Cell size is 301 feet and cell values are elevations in meters ...

7.
Digital Orthophoto Quadrangle (DOQ) Data: Illinois, 1998 - 2001

Digital Orthophoto Quadrangle (DOQ) Data: Illinois, 1998 - 2001

1998-2001. United States Geological Survey (USGS) and Illinois State Geological Survey. This is a collection of tile-by-tile NAPP-III DOQs (1998-2001) images in MrSID format for the state of Illinois, in UTM Zones 15 and 16, NAD83. Ort...

8.
Raster

Land Cover Change in Iowa from 1984 - 2003

1984-2003. Change Detection GRID for the period 1985 to 2002 in the State of Iowa developed from Landsat Imagery. This zip file contains a raster dataset (ESR...

9.
Raster

Land Cover Change in Iowa from 1990 - 2003

1990-2003. Change Detection GRID for the period 1990 to 2002 in the State of Iowa developed from Landsat Imagery.

10.
Land Cover of the State of Iowa in the Years 1984-86

Land Cover of the State of Iowa in the Years 1984-86

1984-86. Iowa Department of Natural Resources. Land Cover of Iowa in From 1984 to 2003 This zip file contains a 15-meter ESRI GRID of the Land Cover of Iowa.

11.
Raster

Land Cover of the State of Iowa in the Years 1989-91

1989-91. Land cover / Land use classification of the Iowa landscape derived from satellite imagery collected between 1989 and 1991. This zip file is a 15 m...

12.
Raster

Land Cover Persistence from 1984-2003: Iowa

1984-2003. Persistence of Land Cover Classes for the State of Iowa in the Years 1984-2002 This zip file contains a 15-meter raster dataset (ESRI GRID).

13.
Raster

WISCLAND Land Cover: Wisconsin, 1998 (Grid)

1998. Wisconsin Department of Natural Resources. This Grid-format data set, known as WISCLAND Land Cover, is a raster representation of land cover of Wisconsin derived from Landsat satellite image...

14.
Raster

WISCLAND Land Cover: Wisconsin, 1998 (Image)

1991-1993. Wisconsin Department of Natural Resources. This tif-format data image of Wisconsin Land Cover illustrates the Level 2 land cover classification encoded in the Wisconsin Land Cover Grid. The ...