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Investigation:

LC-01 (Walsh / Bilsborrow / Manosalvas)

LBA Dataset ID:

LC01_CITIES_COMMUNITIES_ROADS

Originator(s):

1. WALSH, S.J.
2. BILSBORROW, R.E.
      3. FRIZZELLE, B.G.

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 the boundaries of the four major cities in the Northern Ecuadorian Amazon, as well as the primary communities in the colonist settlement study area in the northern Oriente of Ecuador and the road network for the northern Oriente of Ecaudor, circa 2002.
Portions of the road network are current to 2002, while others are current only to either 2000 or 1990. The road network was originally digitized from 1:50,000 scale topographic maps from 1990 and appended together.

Beginning Date:

1990-01-01

Ending Date:

2002-12-31

Metadata Last Updated on:

2012-01-31

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-01 City, Community, and Road Maps, Northern Ecuadorian Amazon: 1990-2002 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1058

Documentation/Other Supporting Documents:

LBA-ECO LC-01 City, Community, and Road Maps, Northern Ecuadorian Amazon: 1990-2002 :  http://daac.ornl.gov/LBA/guides/LC01_Cities_Communities_Roads.html

Citation Information - Other Details:

Walsh, S.J., R.E. Billsborrow and B. Frizelle. 2012. LBA-ECO LC-01 City, Community, and Road Maps, Northern Ecuadorian Amazon: 1990-2002. 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/1058

Keywords - Theme:

Parameter Topic Term Source Sensor
CULTURAL FEATURES HUMAN DIMENSIONS INFRASTRUCTURE TOPOGRAPHIC MAP DIGITIZER

Uncontrolled Theme Keyword(s):  CITIES, COMMUNITIES, ECUADOR, ROAD NETWORK

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
  ECUADOR 0.10030 -0.47740 -76.63560 -76.99280

Related Publication(s):

Messina, J.P. and S.J. Walsh. 2001. 2.5D Morphogenesis: Modeling Landuse and Landcover Dynamics in the Ecuadorian Amazon. Plant Ecology 156 (1): 75-88.

Pan, W.K.Y., S.J. Walsh, R.E. Bilsborrow, B.G. Frizzelle, C.M. Erlien, and F. Baquero. 2004. Farm-level models of spatial patterns of land use and land cover dynamics in the Ecuadorian Amazon. Agriculture Ecosystems & Environment 101(2-3):117-134.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Study Area: Northern Ecuadorian Amazon

Projection: Universal Transverse Mercator 18S

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984





Spatial Coverage:

Cities: West Bounding Coordinate: -76.992752, East Bounding Coordinate: -76.635641, North Bounding Coordinate: 0.100360, South Bounding Coordinate: -0.477395



Communities: West Bounding Coordinate: -77.330462, East Bounding Coordinate: -76.488150, North Bounding Coordinate: 0.190454, South Bounding Coordinate: -0.884598



Road network: West Bounding Coordinate: -78.002470, East Bounding Coordinate: -75.354332, North Bounding Coordinate: 0.356240, South Bounding Coordinate: -1.004539





Variables



Cities:

FID: Internal feature number; Sequential unique whole numbers that are automatically generated.

Shape: Feature geometry.

ID: Sequential numbers identifying the polygons.

NAME: Name of the city.





Communities

Description: The name of each community is defined by the contents of the Comm_name field in the .dbf file that accompanies the .shp file.



Road network:

Data attribute table contains the following attributes:

1) FID: Internal feature number.

2) Shape: Feature geometry.

3) FNODE#: Internal node number for the beginning of an arc (from-node).

4) TNODE#: Internal node number for the end of an arc (to-node).

5) LPOLY#: Internal node number for the left polygon.

6) RPOLY#: Internal node number for the right polygon.

7) LENGTH: Length of feature in internal units. Represent the length of the arc in meters.

8) TRN_ORIENTE03#: Internal feature number.

9) TRN_ORIENTE03-ID: User-defined feature number.

10) OBJECTID: Internal feature number.

11) TYPE: The original road type code based on the categories on the 1990 topographic maps. Codes: 10=Bridge/Puente, 11=Path/Sendero, 20=Seasonal road/Camino temporal, 30=Narrow (one-lane) unpaved road/Carretera sin pavimentar angosto, 31=Narrow (one-lane) paved road/Carretera pavimentada angosto, 32=Unpaved road, 2 or more lanes/Carretera sin pavimentar dos o mas vias, 33=Paved road, 2 or more lanes/Carretera pavimentada dos o mas vias, 34=Highway, freeway, 2 or more lanes/Autopista, carretera pavimentada (dos o mas vias), 40=Ferry/Barco de pasaje

12) TRN_CODE: The current numeric road surface type code. Codes: 10=Footpath/Sendero, 11=Unknown Footpath/Sendero Desconocido (Current surface believed to be Footpath), 20=Fair-Weather Dirt Road/Camino de Tierra Temporal, 21=Unknown Fair-Weather Dirt Road/Camino de Tierra Temporal Desconocido (Current surface believed to be Fair-Weather Dirt Road), 30=All-Weather Dirt Road/Camino de Tierra Todo El Tiempo, 31=Unknown All-Weather Dirt Road/Camino de Tierra Todo El Tiempo Desconocido (Current surface believed to be All-Weather Dirt Road), 40=Smooth-Stone Paved Road/Camino de Piedra Bola, 45=Smooth-Stone & Dirt Road/Camino de Piedra Bola y Tierra, 46=Smooth-Stone & Petroleum/Camino de Piedra Bola y Petroleo, 50=Cobblestone Hexagonal-Cement Block Road/Via Adoquinada, 60=All-Weather Paved Road/Via Pavimentada, 70=Unknown Hard-Surface Road/Camino de Superficie Dura Desconocido (Current surface known to be hardened. The exact surface type is unknown.), 80=Bridge/Puente, 85=Ferry/Barco de Pasaje,

13) TRN_TYPE: The current text road surface type code. Codes: S=Footpath/Sendero, SD=Unknown Footpath/Sendero Desconocido (Current surface believed to be Footpath.), TT=Fair-Weather Dirt Road/Camino de Tierra Temporal, TTD=Unknown Fair-Weather Dirt Road/Camino de Tierra Temporal Desconocido (Current surface believed to be Fair-Weather Dirt Road.), TTT= All-Weather Dirt Road/Camino de Tierra Todo El Tiempo, TTTD=Unknown All-Weather Dirt Road/Camino de Tierra Todo El Tiempo Desconocido (Current surface believed to be All-Weather Dirt Road.), PB=Smooth-Stone Paved Road/Camino de Piedra Bola, PBT=Smooth-Stone & Dirt Road/Camino de Piedra Bola y Tierra, PBP=Smooth-Stone & Petroleum/Camino de Piedra Bola y Petroleo, VA=Cobblestone Hexagonal-Cement Block Road/Via Adoquinada, VP=All-Weather Paved Road / Via Pavimentada, CSDD=Unknown Hard-Surface Road/Camino de Superficie Dura Desconocida (Current surface known to be hardened.), P=Bridge/Puente, F=Ferry/Barco de Pasaje

14) TRN_DESC: Description of the road surface type

15) MIN_SPEED: Minimum speed in kilometers per hour

16) MAX_SPEED: Maximum possible speed in kilometers per hour

17) AVG_SPEED: Average speed in kilometers per hour

18) SHAPE_LENG: Length of segment

Data Application and Derivation:

Typical application of the data: This data set can be used for cartographic purposes, or for analyses that require known locations of large towns/cities, communities or road networks including network, proximity or other spatial analyses.



Derivation techniques and algorithms



Cities: Polygons were digitized and labeled. ARC/INFO coverage was converted to an ArcView shapefile.



Communities: Points were collected using Trimble GeoExplorer II and GeoExplorer 3 GPS receivers. The data were differentially corrected and exported to an ArcView shapefile. The points were attributed based on field forms.



Road Network: 1:50,000-scale topographic maps were digitized. The individual topographic map road coverages were edgematched and appended. Positions and surface attributes were updated for roads in the Northern ISA, using GPS. Road positions were altered to fit locations as seen in a 1999 Landsat TM image and a 2000 Landsat ETM image.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Data Usage Guidance

Cities:

Users should recognize that these polygons represent the size of these 4 major cities at a single point in time and that the boundaries of these cities before or since the date they were mapped (1993) are likely different.



Positional accuracy: Horizontal accuracy is assumed to be within the NMAS standards for a map of this scale.



Data Usage Guidance: There are no use constraints.





Communities: Attribution of the point locations with the community name is 100% accurate. However, it is important to note that the spelling of the community names may vary, and some communities may have alternate names. Points are within 10 meters of their true location. Each point represents the center of its community, the location of which was subjectively chosen by the field worker.





Road network:

Attribution for those arcs current to 1990 is based on the attribution from the topographic maps. The attributes for those arcs current to 2000 are based on field observations, and were set to the same categories as those on the maps. The 1990 map categories and 2000 categories were retrofitted to the more accurate 2002 categories. The 2002 categories in use are based on field observations and more accurately describe the range of surface types in the Oriente. The speed ranges applied to these roads are based on field observations. The average speed is simply the average of the minimum and maximum speeds. Horizontal accuracy is considered to be at least as accurate as what can be expected from NMAS standards on a 1:50,000-scale map (~25m). Most roads have been updated using GPS and satellite imagery, making them accurate to within 5m and 15m, respectively. Positions and surface attributes were updated for roads in the Southern, Eastern and Southwestern ISAs, using GPS.



Data Usage Guidance: There are no use constraints. However, potential users should be wary of using this data for analyses at scales larger than 1:50,000. Users should also keep in mind that only a portion of the road network has current surface type attribution.

Process Description:

Data Acquisition Materials and Methods:

Cities: Map entitled Mapa del Nororiente de Ecuador: Situacion Legal de las Tierras (scale=1:250,000) produced by Ecuadorian-German project PROFORS (Programa Forestal Sucumbios) and published by INEFAN - PROFORS in 1993 (INEFAN=(Instituto Ecuatoriano Forestal y de Areas Naturales y Vida Silvestre) was obtained from Instituto Geografico Militar de Ecuador (IGM).

Title: Mapa del Nororiente del Ecuador: Situacion Legal de las Tierras

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 1:250,000

Type_of_Source_Media: paper



Communities: Points were collected using Trimble GeoExplorer II and GeoExplorer 3 GPS receivers. The data were differentially corrected and are within 10 meters of their true location.



Road network: Data were digitized from 1:50,000-scale topographic maps obtained from the Instituto Geografico Militar de Ecuador in Quito, Ecuador.

References:

none cited

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