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1. 104 State Water Plan Watersheds: Pennsylvania

1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...

2. Acoustic Reflexivity (Backscatter) Image: Ascension Slope, Monterey Bay, California, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF contains multibeam backscatter (acoustic reflexivity) imagery extracted from gridded bathymetry data of the Ascension Slope region of ... Monterey Bay Aquarium Research Institute.

3. Acoustic Reflexivity (Backscatter) Image: Lower Lucia Canyon, Monterey Bay, California, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF shows multibeam backscatter imagery extraced from gridded bathymetry of Lower Lucia Canyon in Monterey Bay, California. Original bathy... Monterey Bay Aquarium Research Institute.

4. Acoustic Reflexivity (Backscatter) Image: MBARI Monterey Bay Mulitbeam Survey Area, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF contains multibeam backscatter (acoustic reflexivity) imagery extraced from gridded bathymetry data of Monterey Bay, California. This ... Monterey Bay Aquarium Research Institute.

5. Acoustic Reflexivity (Backscatter) Image: Monterey Canyon, California, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF shows multibeam backscatter imagery extraced from gridded bathymetry of Monterey Canyon in California. Original bathymetric data were ... Monterey Bay Aquarium Research Institute.

6. Acoustic Reflexivity (Backscatter) Image: Sur Ridge & Sur Canyon, Monterey Bay, California, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF shows multibeam backscatter imagery extraced from gridded bathymetry of Sur Ridge and Sur Canyon in California. Original bathymetric d... Monterey Bay Aquarium Research Institute.

7. Acoustic Reflexivity (Backscatter) Image: Upper Lucia Canyon, Monterey Bay, California, 1998

1998. Monterey Bay Aquarium Research Institute. This GeoTIFF shows multibeam backscatter imagery extraced from gridded bathymetry of Upper Lucia Canyon in Monterey Bay, California. Original bathy... Monterey Bay Aquarium Research Institute.

8. Administrative Unit Capitals, Pakistan, 1998

1998. Asian Spatial Information and Analysis Network (Australia). Australian Centre. and Griffith University. This point shapefile contains the capital cities for level 1 administrative (ADM1) units in Pakistan in 1998. Administrative units consist of 4 pro... Asian Spatial Information and Analysis Network (Australia). Australian Centre.

9. Administrative Units with Populations, Pakistan, 1998

1998. Asian Spatial Information and Analysis Network (Australia). Australian Centre. and Griffith University. This polygon shapefile contains the administrative unit boundaries for Pakistan in 1998. Administrative units consist of 4 provinces, one federal c... Asian Spatial Information and Analysis Network (Australia). Australian Centre.

10. Aeromagnetic map of Minnesota, north-central region - Angle Inlet and Oak Island quadrangles

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

11. Aeromagnetic map of Minnesota, north-central region--Baudette quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

12. Aeromagnetic map of Minnesota, north-central region--Bigfork quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

13. Aeromagnetic map of Minnesota, north-central region--Blackduck quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

14. Aeromagnetic map of Minnesota, north-central region--Fosston quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

15. Aeromagnetic map of Minnesota, north-central region--Grygla quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

16. Aeromagnetic map of Minnesota, north-central region--Little Fork and International Falls quadrangles

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

17. Aeromagnetic map of Minnesota, north-central region--Roseau quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

18. Aeromagnetic map of Minnesota, north-central region--Upper Red Lake quadrangle

1998. Chandler, Val W. and Lively, R.S. Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines...

19. Agricultural Land Use: Russian River Basin, Sonoma County, California, 19989

1998. Circuit Rider Productions. This polygon shapefile shows farmland areas within the Sonoma County section of the Russian River Watershed basin in California. The original agric... Circuit Rider Productions.

20. Arctic Ice Chart, April 1, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 1, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

21. Arctic Ice Chart, April 14, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 14, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

22. Arctic Ice Chart, April 15, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 15, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

23. Arctic Ice Chart, April 16, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 16, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

24. Arctic Ice Chart, April 17, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 17, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

25. Arctic Ice Chart, April 2, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 2, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

26. Arctic Ice Chart, April 20, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 20, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

27. Arctic Ice Chart, April 21, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 21, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

28. Arctic Ice Chart, April 22, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 22, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

29. Arctic Ice Chart, April 23, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 23, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

30. Arctic Ice Chart, April 24, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 24, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

31. Arctic Ice Chart, April 27, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 27, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

32. Arctic Ice Chart, April 28, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 28, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

33. Arctic Ice Chart, April 29, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 29, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

34. Arctic Ice Chart, April 3, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 3, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

35. Arctic Ice Chart, April 30, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 30, 1998. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

36. Arctic Ice Chart, April 6, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 6, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

37. Arctic Ice Chart, April 7, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 7, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

38. Arctic Ice Chart, April 8, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 8, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

39. Arctic Ice Chart, August 10, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 10, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

40. Arctic Ice Chart, August 11, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 11, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

41. Arctic Ice Chart, August 12, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 12, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

42. Arctic Ice Chart, August 13, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 13, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

43. Arctic Ice Chart, August 14, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 14, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

44. Arctic Ice Chart, August 17, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 17, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

45. Arctic Ice Chart, August 18, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 18, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

46. Arctic Ice Chart, August 19, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 19, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

47. Arctic Ice Chart, August 20, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 20, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

48. Arctic Ice Chart, August 21, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 21, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

49. Arctic Ice Chart, August 24, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 24, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

50. Arctic Ice Chart, August 25, 1998

1998. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 25, 1998. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).