NYU Spatial Data Repository

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1. A map of Lewis and Clark's track across the western portion of North America, from the Mississippi to the Pacific Ocean : by order of the executive of the United States in 1804, 5 & 6

1979. Lewis, Samuel, 1753 or 1754-1822. Relief shown by hachures. Prime meridians: Washington and London. Facsimile. Historic Maps copy has note taped to verso: One hundred and sixty copi... [Philadelphia : American Philosophical Society, 1979].

2. Arctic Ice Chart, April 17, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 17, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

3. Arctic Ice Chart, April 19, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 19, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

4. Arctic Ice Chart, April 2, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 2, 1979. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

5. Arctic Ice Chart, April 23, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 23, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

6. Arctic Ice Chart, April 26, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 26, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

7. Arctic Ice Chart, April 30, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 30, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

8. Arctic Ice Chart, April 5, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 5, 1979. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

9. Arctic Ice Chart, April 9, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 9, 1979. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

10. Arctic Ice Chart, August 1, 1979

1979. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 1, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).