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Investigation:

LC-15 (Saatchi / Alvala)

LBA Dataset ID:

LC15_LandCover_1KM

Originator(s):

Saatchi, Dr. Sassan S.

Point(s) of Contact:

Saatchi, Dr. Sassan S. (Saatchi@congo.jpl.nasa.gov)

Dataset Abstract:

Vegetation types of the Amazon basin are mapped using synergistic use of optical and microwave remote sensing data. The primary application of this map is to improve the land surface parameterization of ecosystem models over the basin. The vegetation types are divided in three categories based on their structure, phenology, and flooding condition as observed by radar and optical images. The radar data layers are the GRFM JERS-1 mosaics for dry and wet seasons of the Amazon basin collected in 1995 and 1996, and texture measures at 1 km resolution. The optical images are 12 monthly NDVI composites at 1 km resolution. The NDVI images were produced from several iterations of cloud removal filters over three years of 10 day composites of SPOT VEGETATION data for the 1998-2001 period. Fusion of the optical and microwave data is performed at pixel level with all images converted to the same projection and registered to less than one pixel accuracy. Terra firme forest and savanna types are separated based on their canopy cover and phenology from both radar and optical data. Floodplain vegetation is mapped according to dry and wet season signal responses in L-band radar images, canopy openness, and NDVI patterns of low-, medium-, and high-density vegetation. Classification of optical and radar images are performed in a probabilistic decision tree algorithm developed for input layers with different signal statistics. A set of training and test areas are chosen based on existing maps and Landsat TM images. These data sets are used for both growing and pruning of the decision tree in order to produce a set of optimum rules for the classifier and to assess the accuracy of the final thematic product. The result is a 1 km vegetation map with 16 land cover types and an overall accuracy of above 85%. The final map is compared with existing 1 km resolution vegetation maps of the basin, individual Landsat TM classified images, and the wetlands mask of central Amazon basin in order to assess the classification accuracy and to produce the area estimates of each land cover type in the basin.
Land cover map including a separate wetland map of the Amazon basin is produced at 1 km resolution. Land cover maps are derived from regional remote sensing data for late 1990s.

Beginning Date:

None indicated.

Ending Date:

None indicated.

Metadata Last Updated on:

2012-06-01

Data Status:

In Preparation for Archive

Access Constraints:

Public

Data Center URL:

http://daac.ornl.gov

Distribution Contact(s):

Dr. Sassan Saatchi saatchi@congo.jpl.nasa.gov

Access Instructions:

Public

Data Access:

IMPORTANT: The LBA-ECO Project website is no longer being supported. Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC. Please follow the fair use guidelines found in the dataset documentation when using or citing LBA data.
Datafile(s):

http://www-radar.jpl.nasa.gov/carbon/
Access data at ORNL DAAC:  Search at ORNL DAAC

Citation Information - Other Details:

Saatchi S.S., M. Steinenger, C.J. Tucker, B. Nelson, M. Simard, M. 2008. 1km Land Cover and Wetlands Maps of the Amazon Basin. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Keywords - Theme:

Parameter Topic Term Source Sensor
VEGETATION COVER BIOSPHERE VEGETATION TERRA (MORNING EQUATORIAL CROSSING TIME SATELLITE) SRTM (SHUTTLE RADAR TOPOGRAPHY MISSION)
VEGETATION INDEX BIOSPHERE VEGETATION JERS-1 (JAPANESE EARTH RESOURCES SATELLITE-1) SAR (SYNTHETIC APERTURE RADAR)
VEGETATION INDEX BIOSPHERE VEGETATION SPOT (SYSTEME PROBATOIRE POUR L\'OBSERVATION DE LA TERRE) SPOT MULTISPECTRAL

Uncontrolled Theme Keyword(s):  Amazon Basin, Land Cover Map , Wetlands

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Amazon Basin Amazon Basin 13.85830 -82.72083

Data Characteristics (Entity and Attribute Overview):

Data Application and Derivation:

The primary application of this map is to improve the land surface parameterization of ecosystem models over the Amazon basin.

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