Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps Time Period 1900-1949 Remove constraint Time Period: 1900-1949
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1.
Aerial Imagery: Hennepin County, Minnesota, 1940

Aerial Imagery: Hennepin County, Minnesota, 1940

1940. Rectified black and white aerial imagery of portions of Hennepin County captured during the summer of 1940.

2.
Aerial Photography Counties: Iowa, 1930s

Aerial Photography Counties: Iowa, 1930s

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

3.
Raster

Aerial Photography: Dakota County, Minnesota, 1927-2016

1927-2016. Partial and County wide ortho photography at various pixel resolutions from a variety of years from 1927 - 2016. <a href="Summary.htm">Horizontal A...

4.
Aerial Photography Dates File: Iowa, 1930s

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.

5.
Vector Created with Sketch.

Forest Cover Types - East Upper Peninsula: Michigan, 1939

1939. 1939 Forest Cover Types - East Upper Peninsula.

6.
Vector Created with Sketch.

Forest Cover Types - Menominee County: Michigan, 1939

1939. 1939 Forest Cover Types - Menominee County.

7.
Vector Created with Sketch.

Forest Cover Types - West Upper Peninsula: Michigan, 1939

1939. 1939 Forest Cover Types - West Upper Peninsula.

8.
Raster

Historical Aerial Photography: Illinois, 1937-1947

1936-1941. Illinois State Geological Survey. The primary data set consists of historical black and white aerial photographs from Illinois acquired during 1936 to 1941. Alternative years of pho...

9.
Image

Historical Map Collection for Lancaster County: Pennsylvania

1900. Historical maps in TIFF format of Lancaster County.

10.
Image

Minnesota Historical Aerial Photographs Online (MHAPO), 1920-2000

1920-2000. John R. Borchert Map Library and Minnesota Department of Natural Resources (MNDNR). Provides access to 121,000 digital copies of non-georeferenced air photos that were captured between 1923 and 2007 and are freely available via the...

11.
Purdue Campus: West Lafayette, Indiana, 1903

Purdue Campus: West Lafayette, Indiana, 1903

1903. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

12.
Purdue Campus: West Lafayette, Indiana, 1904

Purdue Campus: West Lafayette, Indiana, 1904

1904. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

13.
Purdue Campus: West Lafayette, Indiana, 1906

Purdue Campus: West Lafayette, Indiana, 1906

1906. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

14.
Purdue Campus: West Lafayette, Indiana, 1907

Purdue Campus: West Lafayette, Indiana, 1907

1907. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

15.
Purdue Campus: West Lafayette, Indiana, 1908

Purdue Campus: West Lafayette, Indiana, 1908

1908. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

16.
Purdue Campus: West Lafayette, Indiana, 1910

Purdue Campus: West Lafayette, Indiana, 1910

1910. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

17.
Purdue Campus: West Lafayette, Indiana, 1912

Purdue Campus: West Lafayette, Indiana, 1912

1912. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

18.
Purdue Campus: West Lafayette, Indiana, 1916

Purdue Campus: West Lafayette, Indiana, 1916

1916. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

19.
Purdue Campus: West Lafayette, Indiana, 1917

Purdue Campus: West Lafayette, Indiana, 1917

1917. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

20.
Purdue Campus: West Lafayette, Indiana, 1921

Purdue Campus: West Lafayette, Indiana, 1921

1921. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...