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GGEEOOGGRR A APPHHIICC

DD A ATT A ABB A ASSEE Project Information

Area of Interest:

ARGENTINA: Bahia


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Satellite Imagery used (ASTER): 003_2018527476_09 th November 2003

Project Parameters:Datum: WGS84 (GRS-1980)

Projection: South UTM 20 (zone H)Central Meridian: 63° West

CoverageThis geographic product covers a 20km x 20km area of Bahia in Argentina.

38° 37' 17" SGeographic bounds: 62° 22' 54" W 62° 09' 12" W(SW corner to NE corner) 38° 48' 11" S

5 724 900m Northing

UTM bounds: 553 700m Easting 573 700m Easting5 704 900m Northing

Argent ina: Bahia General Information

Private Bag X20 Constantia 7848Block C, The TerracesSteenberg Office Park

Westlake, 7945Cape Town South AfricaTel +27 (0)21 700 8140Fax+27 (0)21 701 9520

[email protected]


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Package contentThe delivery contains four (4) dataset layers and a *.pdf document. The data wasprocessed on the 08th October 2008.

• A 20 meter resolution Digital Terrain Model (DTM).

• A 10 meter resolution ortho image.

• A 20 meter resolution Land-Use Raster (morphology).• A vector network.

• A Bahia.pdf document containing the project information (this document).

Digital Terrain ModelFormatThe Digital Terrain Model is provided in an Atoll (Planet: “file”) (2bytes, signed) format.

Image informationNumber of Columns (DIM_X) 1000 pixels

Number of Rows (DIM_Y) 1000 pixelsNorthwest corner (553700m E, 5724900m N) metersSoutheast corner (573700m E, 5704900m N) metersZ value unit: metersPixel size (resolution): 20 metersPlanimetric accuracy: 20 metersVertical accuracy: 5 - 10 meters

Al timetric InformationThe altitudes range between 0 meters and 100 meters, with an average altitude of

approximately 32 meters.

Ortho-imageFormatThe Ortho image is provided in an Atoll (Planet: *.tif) format (RGB, unsigned), and derivedfrom the ASTER satellite imagery.

File Content

Number of Columns (DIM_X) 2000 pixelsNumber of Rows (DIM_Y) 2000 pixelsNorthwest corner (553700m E, 5724900m N) metersSoutheast corner (573700m E, 5704900m N) meters Pixel size (resolution): 10 metersPlanimetric accuracy: 20 meters


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MorphologyFormatThe morphology is provided in an Atoll (Planet: “file”) format (2byte, signed) and derivedfrom the ASTER satellite imagery.

Image information

Number of Columns (DIM_X) 1000 pixelsNumber of Rows (DIM_Y) 1000 pixelsNorthwest corner (553700m E, 5724900m N) metersSoutheast corner (573700m E, 5704900m N) metersPixel size (resolution): 20 metersPlanimetric accuracy: 20 metersMeaning of the pixel valuesThe values relate to each pixel stored in the image and corresponds to a coderepresenting the land-use type (class). A correspondence table between codes,description and definition is provided. Below are the 18 classes:

Code Descript ion Definition%

cover

Building

Heights

Image sample 1 Image sample 2

1 sea Areas of coastal water,including oceans, bays andestuaries.

3.81 % 0m

2 inland water

Areas of permanent openwater. Including natural andman-made bodies, which areeither static or flowing (rivers,

dams (i.e. reservoirs),permanent pans and lakes)

0.42 % 0m

3 wetland

Areas of open or vegetatedland that is periodicallyinundated with water orcovered with shallow standingwater.

0.00 % 0m

4 barren Areas that contain novegetation.

11.53 % 0m

5grass/agriculture

Agricultural fields typicallycharacterized by theirgeometric shape and used forthe production of annual crops(orchards, vineyards, livestockgrazing and hay crops etc).Includes actively tilled land,undeveloped lots, parks and

golf courses.

56.79 % 0m


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coverBuildingHeights


6 rangelandScattered low scrub vegetationand areas of mixed grassland.

8.23 % 0-2m

7 woodland

None-continuous, mixeddensity (30% -60% canopycover), with young trees ortrees that are generally lessthan five (5) meters.

2.67 % < 5m

8 forest

Continuous cover of plantation

and/or native tree species withan average height generallygreater than five (5) meters.

5.29 % > 5m

9 villageSmall built-up areas withinrural setting that includesuburban and urban classes.

0.92 % 3-8m

10 suburban

Areas of residential settlementmainly single (1) story houses,medium tree cover (


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coverBuildingHeights


14 core urban

Areas within the urbanperimeter; dense urban withbuilt-up features generallyindistinct from each other;heights of buildings above forty(40) meters. Includes single orsmall isolated clusters of highbuildings.

0.04 % > 40m

15buildingblocks

Groups of generally narrowbuildings that may be paralleland separated by open space;(mostly apartment or officeblocks).

0.01 % 20-40m

16 industrial

Industrial / commercial /institutional areas includingbuildings with large footprints.Heights generally below twenty(20) meters and separated bystreets wider than twenty (20)meters.

1.56 % < 20m

17 airportLanding strips and runwaysurfaces.

0.06 % 0m

18 open in urban

Areas with little or novegetation (paved areas)within the urban footprint,including transportationcorridors.

0.02 % 0m


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VectorsFormatThe vector files are provided in an Atoll (Planet: *.asc) format, with nine (9) individualfeature files being supplied.

Origin and accuracyThe vector data was digitised from the ASTER satellite imagery.Planimetric accuracy: 20 meters.

Vector Features capturedBelow are the features classes contained in the vector files:1 coastline2 highway

3 inland water4 major street5 railway6 runway7 secondary road8 single river9 street

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