This data set contains GIS coverages
constructed from measurements taken of four logged areas in Cauaxi,
Coverages
are in ArcInfo
interchange format (*.e00). The geographic projection of the data is
UTM zone
22,
Figure
1. Location of
logged areas in Cauaxi,
Cite this data set as follows:
Asner,
G.P. 2008. LBA-ECO LC-13 GIS Coverages
of Logged Areas, Cauaxi,
The LBA Data and Publication Policy [http://daac.ornl.gov/LBA/lba_data_policy.html] is in effect for a period of five (5) years from the date of archiving and should be followed by data users who have obtained LBA data sets from the ORNL DAAC. Users who download LBA data in the five years after data have been archived must contact the investigators who collected the data, per provisions 6 and 7 in the Policy.
This data set was archived in July of 2008. Users who download the data between July 2008 and June 2013 must comply with the LBA Data and Publication Policy.
Data users should use the Investigator
contact information in this
document to communicate with the data provider. Alternatively, the LBA
Web Site
[http://lba.inpa.gov.br/lba/]
in
Data users should use the Data Set Citation and other applicable references provided in this document to acknowledge use of the data.
Project: LBA (Large-Scale Biosphere-Atmosphere Experiment in the Amazon)
Activity: LBA-ECO
LBA Science Component: Land Use and Land Cover
Team ID: LC-13 (Asner / Silva )
The investigators were Asner, Gregory Paul; Silva, Jose Natalino Macedo; Cooper, Amanda Naslund; Hare, Anna Quinn; Harris III, Albert Thomas; Keller, Michael M.; Knapp, David E.; Olander, Lydia Pauline; Palace, Michael William and Warner, Amanda Susan . You may contact Asner, Gregory P. (greg@globalecology.stanford.edu) and Knapp, David E. (deknapp@stanford.edu)
LBA Data Set Inventory ID: LC13_GIS_Cauaxi
This data set includes GIS coverages of
four selectively logged blocks on the Fazenda
Cauaxi (Cikel-Verde) in the State
of Para, Brazil. Coverages
include log decks
(patios), roads, skids trails, tree-fall locations, and block boundary.
Coverages are in ArcInfo
interchange format (*.e00). The geographic projection of the data is
UTM zone
22, South in the WGS84 datum. Two sets of coverages
are for conventionally logged blocks in 1996 and 1998. The other two
are for
reduced-impact logging in 1996 and 1998.
Related Data Set:
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,
Site boundaries: (All
latitude and longitude given in
degrees and fractions)
Site (Region) |
Westernmost Longitude |
Easternmost Longitude |
Northernmost Latitude |
Southernmost Latitude |
Geodetic Datum |
Para Eastern ( |
-48.29060 |
-48.29060 |
-3.73130 |
-3.73130 |
GCS_WGS_1984 |
Time period:
Platform/Sensor/Parameters measured include:
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).
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.
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.
Sensors used include:
This data is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) or the EOS Data Gateway.
E-mail: uso@daac.ornl.gov
Telephone: +1 (865) 241-3952
FAX: +1 (865) 574-4665
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
Pereira,
R., J. Zweede,
G.P. Asner, and M.
Keller.
Related Publications: