Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1.
Image

Aerial Image Service: Lorain County, Ohio, 1999

1999. 1999_Aerial_Image_Service.

2.
Vector Created with Sketch.

Alleys: Washington, D.C., 1999

1999. Alley centerlines captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washin...

3.
Vector Created with Sketch.

Ambient and fixed station network groundwater monitoring point data (1985 - 1998): Pennsylvania

1999. Pennsylvania Department of Environmental Protection. This coverage represents the point locations and data for 1,106 groundwater quality monitoring points sampled under the PA DEP Fixed Station Networ...

4.
Vector Created with Sketch.

Archived Submerged Aquatic Vegetation - SAV 1999: Maryland

1999. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov. The Chesapeake Bay SAV was mapped from 1:24,000 black and whit...

5.
Bedrock geologic map and mineral exploration data of the western Vermilion district, St Louis and Lake Counties, northeastern Minnesota, M-98

Bedrock geologic map and mineral exploration data of the western Vermilion district, St Louis and Lake Counties, northeastern Minnesota, M-98

1999. Peterson, Dean M. and Jirsa, Mark A. Compilation of interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments), mineral exploration dat...

6.
Bedrock geologic map of northwestern Minnesota, M-92

Bedrock geologic map of northwestern Minnesota, M-92

1999. Jirsa, Mark A., Chandler, Val W., and Runkel, Anthony C. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of northwestern Minnesota, scale 1:200,...

7.
Bedrock geologic map of the Aitkin 30 x 60 minute quadrangle, east-central Minnesota, M-99, Plate 1

Bedrock geologic map of the Aitkin 30 x 60 minute quadrangle, east-central Minnesota, M-99, Plate 1

1999. Boerboom, Terrency J., Severson, Mark J., and Southwick, David L. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) Aitkin quadrangle, scale 1:100,000.

8.
Bedrock geologic map of the Aitkin 30 x 60 minute quadrangle, east-central Minnesota, M-99, Plate 2

Bedrock geologic map of the Aitkin 30 x 60 minute quadrangle, east-central Minnesota, M-99, Plate 2

1999. Boerboom, Terrency J., Severson, Mark J., and Southwick, David L. Data base, Aitkin quadrangle showing drill holes, outcrops and other data used to make interpretations of bedrock geology for map M-99, scale 1:100...

9.
Bedrock geologic map of the Allen quadrangle, Minnesota, M-91

Bedrock geologic map of the Allen quadrangle, Minnesota, M-91

1999. Severson, Mark J. and Miller, James D., Jr. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Allen quadrangle, scale 1:24,000.

10.
Bedrock geologic map of the central Duluth Complex and the western part of the Beaver Bay Complex Lake and St Louis Counties, Minnesota, M-101

Bedrock geologic map of the central Duluth Complex and the western part of the Beaver Bay Complex Lake and St Louis Counties, Minnesota, M-101

1999. Miller, James D., Jr. and Chandler, Val W. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of part of the Duluth Complex, scale 1:...

11.
Bedrock geologic map the Mille Lacs 30 x 60 minute quadrangle, east-central Minnesota, M-100, Plate 1

Bedrock geologic map the Mille Lacs 30 x 60 minute quadrangle, east-central Minnesota, M-100, Plate 1

1999. Boerboom, Terrency J., Severson, Mark J., and Southwick, David L. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) Mille Lacs quadrangle, scale 1:100,000.

12.
Bedrock geologic map the Mille Lacs 30 x 60 minute quadrangle, east-central Minnesota, M-100, Plate 2

Bedrock geologic map the Mille Lacs 30 x 60 minute quadrangle, east-central Minnesota, M-100, Plate 2

1999. Boerboom, Terrency J., Severson, Mark J., and Southwick, David L. Data base, Mille Lacs quadrangle showing drill holes, outcrops and other data used to make interpretations of bedrock geology for map M-100, scale ...

13.
Vector Created with Sketch.

Bridge and Tunnel Entrances: Washington, D.C., 1999

1999. Bridges, overpasses, tunnel entrances, and underpasses captured in 1999. This dataset was collected as part of the planimetric mapping project. Hid...

14.
Vector Created with Sketch.

Bridges and Tunnels: Washington, D.C., 1999

1999. Hidden bridges and tunnels captured in 1999. This is a new dataset that was not collected as part of the planimetric mapping project. It shows brid...

15.
Vector Created with Sketch.

Building Footprints: Washington, D.C., 1999

1999. Buildings captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washington DC ...

16.
Vector Created with Sketch.

Building Heights: Washington, D.C., 1999

1999. Rooftop elevation captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washin...

17.
Vector Created with Sketch.

Curbs: Washington, D.C., 1999

1999. Curbs captured in 1999. This dataset was collected as part of the planimetric mapping project. Hidden features were added as enhancements to this d...

18.
Raster

Digital Orthophoto Quarter Quadrangle images for Pennsylvania

1999. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

19.
Vector Created with Sketch.

Driveways: Washington, D.C., 1999

1999. Drive centerlines captured in 1999. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washin...

20.
Ecological Land Type Associations: Minnesota

Ecological Land Type Associations: Minnesota

1999. Minnesota Department of Natural Resources (DNR). This coverage provides information for the fourth level of the Ecological Classification System. Polygon boundaries were delineated at a scale of ...