Skip to main content

DAAC Home > Get Data > NASA Projects > Large Scale Biosphere-Atmosphere Experiment (LBA-ECO) > User guide
Get Data

LBA Regional Hydrographic Data, 1-Degree, Release 2.2 (Cogley)


This data set is a subset of Cogley's 1998 global hydrographic data set (GGHYDRO, Release 2.2). The subset was created for the study area of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) in South America (i.e., latitude 10° N to 25° S, longitude 30° to 85° W). The subset is organized into 19 files containing terrain type, stream frequency counts, major drainage basins, and annual water runoff for the LBA study area. The data are presented at a spatial resolution of 1-degree latitude by 1-degree longitude in ASCII GRID file format.

Further information about the data can be found at

LBA was a cooperative international research initiative led by Brazil. NASA was a lead sponsor for several experiments. LBA was designed to create the new knowledge needed to understand the climatological, ecological, biogeochemical, and hydrological functioning of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system. More information about LBA can be found at

GGHYDRO Data Set Categories (Data File)

  1. Exposed land not covered by swamp, intermittent water bodies, glacier ice, sand dunes, saltmarsh, or salt flats (LAND)
  2. Perennial freshwater lakes (FLAK)
  3. Swamp, marsh, and other wetlands(SWMP)
  4. Saltwater, whether marine or terrestrial (SLTW)
  5. Intermittent water bodies (ILAK)
  6. Glacier ice, including shelf ice but excluding pack ice (GLAC)
  7. Sand dunes (DUNE)
  8. Saltmarsh (SMRS)
  9. Salt flats (SFLT)
  10. Land + Swamp + Sand dunes + Saltmarsh (DSRF)
  11. Perennial rivers (FRIV)
  12. Intermittent rivers (IRIV)
  13. Land mask (MS05)
  14. Major drainage basins (BAS1)
  15. Smaller drainage basins (BAS2)
  16. Main features of the cryosphere (CRYO)
  17. Surface runoff of water  (kg/m**2/yr) (RNOF)
  18. Estimated root-mean-square error of RNOF (%) (RNER)
  19. Runoff of ice ( kg/m**2/yr ) (RICE)

Data Citation:

Cite this data set as follows:

Cogley, J. G. 2003. LBA Regional Hydrographic Data, 1-Degree, Release 2.2 (Cogley). Data set. Available on-line [] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/676.


Cogley, J. G. 1998. GGHYDRO—Global Hydrographic Data, Release 2.2. Trent Climate Note 98-1. Department of Geography, Trent University, Peterborough, Ontario, Canada.

Data Format:

Information about the data format, legend, and the procedure used to create the LBA subset are in the following file:

Document Information:


Document Review Date:


Document Curator:

Document URL: