Revision date: October 21, 2011
This data set contains ESRI shapefiles of historical roads (basin-wide federal and state roads) in nine Brazilian states for the Legal Amazon: Amazonas, Para, Acre, Rondonia, Roraima, Tocantins, Amapa, Matto Grosso, and Maranhao. There are 48 compressed (*.zip) files for the years 1968, 1975, 1981, 1985, 1987, and 1993 in GCS South American 1969 projection.
Figure 1. Example images included with this data set: Matto Grosso state roads in 1975 and 1985. Source: Mapa Rodoviario, Matogrosso 1975 and 1985, Republica Federativa Do Brazil, Ministerio Dos Transportes, Department Nacional De Estradas De Rodagem. 2004.
Cite this data set as follows:
Walker, R.T., E.J. Reis and M.M. Caldas. 2011. LBA-ECO LC-24 Historical Roads of the Legal Amazon: 1968-1993. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/ORNLDAAC/1043
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 Users who download LBA data in the five years after data have been archived must contact the investigators who collected the data, per provisions 6 and 7 in the Policy.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 October of 2011. Users who download the data between September 2011 and October 2016 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 Brazil will have current contact information.
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)
LBA Science Component: Land Use and Land Cover
Team ID: LC-24 (Walker / Reis)
The investigators were Walker, Robert T.; Reis, Eustaquio J; Arima, Eugenio; Bohrer, Claudio Belmonte de Athayde; Caldas, Marcellus Marques; Perz, Stephen G; Pfaff, Alexander; Qi, Jiaguo and Souza Jr., Carlos Moreira de. You may contact Caldas, Marcellus Marques (firstname.lastname@example.org).
LBA Data Set Inventory ID: LC24_Historical_Roads_Amazon
This data set contains historical roads for the Legal Amazon in digital format. The data set ranges from 1968 to 1993 for every state in the Legal Amazon.
Related Data Set:
This data set contains ESRI shapefiles of roads for nine states in the Legal Amazon: Amazonas, Para, Acre, Rondonia, Roraima, Tocantins, Amapa, Mato Grosso, and Maranhao, for the years 1968, 1975, 1981, 1985, 1987, and 1993. All years are not included for every state. For example, data for the year 1981 is not included for Tocantins, Rondonia, or Matto Grosso. The files are in GCS South American 1969 projection.
There are 48 compressed (*.zip) files which when extrapolated, contain the shapefiles and a file which contains metadata regarding the originating processing steps of the shapefiles as well as attribute definitions, data quality, spatial reference information, and metadata reference information. The *.zip file names are structured with the state name followed by the year.
Example file names:
Attribute definitions (also found within each *.zip file):
Site boundaries: (All latitude and longitude given in decimal degrees)
|Site (Region)||Westernmost Longitude||Easternmost Longitude||Northernmost Latitude||Southernmost Latitude||Geodetic Datum|
|Legal Amazon--state boundaries||-75.1879||-34.04||8.3438||-21.21125||South-American Datum, 1969 (SAD-69)|
|Acre||-73.802488||-66.731269||-7.347822||-11.022902||South-American Datum, 1969 (SAD-69)|
|Amapa||-54.742988||-49.913802||4.425561||-1.092576||South-American Datum, 1969 (SAD-69)|
|Amazonas||-72.844538||-56.826486||1.536630||-9.568015||South-American Datum, 1969 (SAD-69)|
|Maranhao||-47.552983||-41.834241||-1.195833||-9.131230||South-American Datum, 1969 (SAD-69)|
|Mato Grosso||-61.542388||-50.508728||-8.796888||-18.040534||South-American Datum, 1969 (SAD-69)|
|Para||-58.895380||-46.170945||2.407573||-9.806789||South-American Datum, 1969 (SAD-69)|
|Roraima||-64.465210||-58.895380||5.123103||-0.872818||South-American Datum, 1969 (SAD-69)|
|Rondonia||-66.731269||-59.837460||-8.044120||-13.547230||South-American Datum, 1969 (SAD-69)|
|Tocantins||-50.659780||-46.094152||-5.275282||-13.266041||South-American Datum, 1969 (SAD-69)|
Platform/Sensor/Parameters measured include:
Forest fragmentation resulting from logging, and the building of road networks, affects biodiversity. Understanding the impact of road investments on deforestation is part of a complete evaluation of the expansion of infrastructure for development (Pfaff et al., 2007).
Relation of roads and deforestation derived through neighborhood statistics (spatially auto-correlated regressions).
Accuracy was not assessed for cadastral purposes. Intent was only for relation to deforestation and actual locations may be off by as much as a 1 km.
Files for this data set were acquired from The Brazilian Institute of Geography and Statistics (IBGE).
Figure 2. Map of the Legal Amazon illustrating all roads for the years pertaining to this data set.
This data is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).
Contact for Data Center Access Information:
Telephone: +1 (865) 241-3952
Pfaff, A., J. Robalino, R. Walker, E. Reis, S. Perz, C. Bohrer, and S. Aldrich. 2007. Roads Investments, Spatial Intensification and Deforestation in the Brazilian Amazon. Journal of Regional Science 47(1).