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Investigation:

LC-13 (Asner / Silva )

LBA Dataset ID:

LC13CAUAXI

Originator(s):

ASNER, G.P.

Point(s) of Contact:

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Dataset Abstract:

This data set contains GIS coverages constructed from measurements taken of four logged areas in Cauaxi, Para, Brazil. Logged areas were selectively harvested either using conventional logging techniques or using reduced-impact logging (RIL) techniques (Pereira et al., 2002). Two areas were harvested with each technique in 1996 and two additional areas were harvested in 1998. Coverages include log decks (patios), roads, skids trails, tree-fall locations, and logging area (block) boundary. These field surveys were conducted as part of an investigation of canopy damage following selective logging by two different techniques (Asner et al., 2004). Coverages are in ArcInfo interchange format (*.e00). The geographic projection of the data is UTM zone 22, South WGS84 datum.

Beginning Date:

1996-01-01

Ending Date:

1998-12-31

Metadata Last Updated on:

2008-11-13

Data Status:

Archived

Access Constraints:

PUBLIC

Data Center URL:

http://daac.ornl.gov/

Distribution Contact(s):

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.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):

LBA-ECO LC-13 GIS Coverages of Logged Areas, Cauaxi, Para, Brazil: 1996, 1998 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=890

Documentation/Other Supporting Documents:

LBA-ECO LC-13 GIS Coverages of Logged Areas, Cauaxi, Para, Brazil: 1996, 1998 :  http://daac.ornl.gov/LBA/guides/LC13_GIS_Cauaxi.html

Citation Information - Other Details:

Asner, G.P. 2008. LBA-ECO LC-13 GIS Coverages of Logged Areas, Cauaxi, Para, Brazil: 1996, 1998. 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. doi:10.3334/ORNLDAAC/890

Keywords - Theme:

Parameter Topic Term Source Sensor
LANDSCAPE PATTERNS LAND SURFACE LANDSCAPE FIELD INVESTIGATION GPS (GLOBAL POSITIONING SYSTEM)
LANDSCAPE PATTERNS LAND SURFACE LANDSCAPE COMPUTER MODEL ANALYSIS
LANDSCAPE PATTERNS LAND SURFACE LANDSCAPE MAPS HUMAN OBSERVER

Uncontrolled Theme Keyword(s):  CONVENTIONAL LOGGING, EXTRACTIVE LOGGING, GEOGRAPHIC INFORMATION SYSTEMS, GIS, REDUCED-IMPACT LOGGING, SELECTIVE LOGGING

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Eastern (Belém) Fazenda Cauaxi -3.73130 -3.73130 -48.29060 -48.29060

Related Publication(s):

Asner, G.P., E.N. Broadbent, P.J.C. Oliveira, M. Keller, D.E. Knapp, and J.N.M. Silva. 2006. Condition and fate of logged forests in the Brazilian Amazon. Proceedings of the National Academy of Sciences of the United States of America 103(34):12947-12950.

Asner, G.P., M. Keller, and J.N.M. Silva. 2004. Spatial and temporal dynamics of forest canopy gaps following selective logging in the eastern Amazon. Global Change Biology 10(5):765-783.

Asner, G.P., M. Keller, R. Pereira, and J.C. Zweede. 2002. Remote sensing of selective logging in Amazonia - Assessing limitations based on detailed field observations, Landsat ETM+, and textural analysis. Remote Sensing of Environment 80(3):483-496.

Asner, Gregory P., Michael Keller, Rodrigo Pereira Jr., Johan C. Zweede, and Jose N. M. Silva. 2004. Canopy Damage and Recovery After Selective Logging in Amazonia: Field and Satellite Studies. Ecological Applications 14(4): S280-S298.

Palace, M., M. Keller, G.P. Asner, J.N.M. Silva, and C. Passos. 2007. Necromass in undisturbed and logged forests in the Brazilian Amazon. Forest Ecology and Management 238(1-3):309-318.

Pereira, R., J. Zweede, G.P. Asner, and M. Keller. 2002. Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil. Forest Ecology and Management 168(1-3):77-89.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

The data files for each parameter (e.g., skid trails, roads) are provided as ARC/INFO Exchange format (*.e00) files and are combined in four compressed files by logging technique and year:



Conventional_Logging_1996.zip



Conventional_Logging_1998.zip



Reduced_Impact_Logging_1996.zip



Reduced_Impact_Logging_1998.zip





Filenames follow these conventions:



aYY_bbbb.e00



where



a = c (Conventional Logging) or r (Reduced-Impact Logging)



YY = 96 (1996) or 98 (1998)



bbbb = coverage class: boundary, harvtrees, roads, skids, decks



Examples: r96_boundary.e00, r96_harvtrees.e00, r96_roads.e00, r96_skids.e00, r96_decks.e00



* Deck or Log Deck means a place where logs are gathered in or near the forest for further transport to a processing mill or holding yard, sometimes called a landing.



* Skid or Skid Trail means a temporary pathway principally used to drag or transport felled trees or logs or other material to a landing.



* Road or Access Road means a temporary or permanent access route.



Coverages are in ArcInfo interchange format (*.e00). The geographic projection of the data is UTM zone 22, South, WGS84 datum. There are a number of GIS and image processing software packages that can read data in this format

Data Application and Derivation:

These data were collected using GPS in the field along the center of the skid trail, road, or tree fall area. These field surveys were conducted as part of an investigation of canopy damage following selective logging by two different techniques (Asner et al., 2004).

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

The GPS data were checked against imagery and existing maps of the area for accuracy of the road features and other visible features in the imagery or maps.

Process Description:

Data Acquisition Materials and Methods:

The two CL and two RIL blocks were inventoried and mapped prior to and following harvest operations. The number and location of trees felled were recorded. Road, log deck, and skid lengths and areas were measured and mapped using fiberglass measuring tapes and compasses. Road, skid, and log deck widths were also measured with a measuring tape at 50-m intervals. Tree locations, road, skid, and log deck data were transferred to paper maps at a scale of 1:1000. The maps were then digitized into a geographic information system (GIS Arc/Info) and geo-rectified using 124 field GPS measurements. The spatial data layers contain spatially explicit locations and areas of all roads, skids, log decks, and felled trees for each block.



Coverages lacked a defined projection. These .e00 files were imported into ArcMap, corrected, and exported back to .e00 format by ORNL DAAC.

References:

Asner, Gregory P., Michael Keller, Rodrigo Pereira Jr., Johan C. Zweede, and Jose N. M. Silva. 2004. Canopy Damage and Recovery After Selective Logging in Amazonia: Field and Satellite Studies. Ecological Applications 14(4): S280-S298.



Pereira, R., J. Zweede, G.P. Asner, and M. Keller. 2002. Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil. Forest Ecology and Management 168(1-3):77-89.

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