Geoinformatics Solutions for Integrated Agro-ecosystems Research 

Central Asia: landforms

 

Central Asia: landforms

Landforms of Central Asia at 30 arc-second ( about 1 km) resolution, derived from the global GTOPO30 grid by creating 7 classes

Metadata
Identification Information
Citation
Citation Information

International Center for Agricultural Research in the Dry Areas (ICARDA)

2008

Central Asia: landforms

raster digital data

De Pauw, E. 2008. ICARDA Regional GIS Datasets for Central Asia: Explanatory Notes. GIS Unit Technical Bulletin. International Center for Agricultural Research in the Dry Areas (ICARDA), Aleppo, Syria.

http://gu.icarda.org/geocms/public/en/cms/metadata/index/120/Central+Asia%3A+landforms/

Description

Landforms of Central Asia at 30 arc-second ( about 1 km) resolution, derived from the global GTOPO30 grid by creating 7 classes

Landforms are used to define agroecological zones

7 landform classes based on elevation and relief intensity (a proxy for generalized slope)

Time Period of Content
Time Period Information

ground condition

Status

Complete

Irregular

Spatial Domain
Bounding Coordinates

46.491856

87.308524

55.432762

35.141094

Keywords
Theme

REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.

elevation

DEM

GTOPO30

digital elevation model

landforms

relief

Place

Central Asia

Tajikistan

Turkmenistan

Kazakhstan

Uzbekistan

Kyrgyzstan

Open access policy: reproduction and distribution of this dataset is allowed subject to proper citation (see citation information)

Fair use policy: commercialization of this dataset is not allowed. No constraints on use in applications, whether for commercial or non-profit.

Point of Contact
Contact Information
Contact Person Primary

ICARDA, Geoinformatics Unit

ICARDA

ICARDA, Geoinformatics Unit

+963-21-2213433

+963-21-2169-2470

icarda-gisu@cgiar.org

Browse Graphic

http://geonet.icarda.cgiar.org/geonetwork/data/regional/cacilm/Topography/thumbnail/Landforms_7Cl_A3.jpg

Map with 7 landform classes, created by export from a ArcGIS project using A3 size and 90 dpi

JPEG

Browse Graphic

http://geonet.icarda.cgiar.org/geonetwork/data/regional/cacilm/Topography/map/Landforms_7Cl_A3.tif

Map with 7 landform classes, created by export from a ArcGIS project using A3 size and 300 dpi

TIFF

Bashar Nseir, Layal Atassi, and Fawaz Tulaymat have been involved at one time or another in the GIS processing of this and similar datasets of the GIS Unit

Security Information

Unclassified

Cross Reference
Citation Information

GTOPO30 1-km global digital elevation model

Gesch D.B. and Larson K.S., 1996. Techniques for development of global 1-kilometer digital elevation models. In: Pecora Thirteen, Human interactions with the environment.

Data Quality Information

Positional Accuracy

Lineage
Process Step

To identify landforms, two criteria were used: absolute elevation and the degree of dissection, as expressed by the difference in elevation between adjacent high and low points. Because the Dem GTOPO30 has a resolution of only 1 km, there is no real concept of 'slope'. However, the 'relief intensity' is a useful proxy for generalized slope. The relief intensity can be defined as the median difference between the highest and lowest point within the terrain per specified distance, which is expressed in m/km.The combination of 5 relief-intensity classes and 3 elevation classes resulted into 7 distinct landforms.

Spatial Data Organization Information

Raster

Raster Object Information

Grid Cell

2435

4898

1

Spatial Reference Information
Horizontal Coordinate System Definition
Geographic

0.000000

0.000000

Decimal degrees

Planar
Planar Coordinate Information

row and column

Coordinate Representation

0.008333

0.008333

Geodetic Model

D_WGS_1984

WGS_1984

6378137.000000

298.257224

Entity and Attribute Information
Detailed Description
Entity Type

landforms.vat

Attribute

Rowid

Internal feature number.

ESRI

Attribute Domain Values

Sequential unique whole numbers that are automatically generated.

Attribute

VALUE

Attribute

COUNT

Distribution Information
Distributor
Contact Information
Contact Person Primary

Eddy De Pauw

ICARDA

Head GIS Unit

+963-21-2213433

+963-21-2169-2470

e.de-pauw@cgiar.org

Downloadable Data

ICARDA declines all responsibility for errors or deficiencies in the database or in the documentation accompanying it, for maintenance or for updating the database. Users are however kindly requested to report any errors or deficiencies in this product to ICARDA.ICARDA is no authority on country boundaries and follows UN practice regarding country boundary location, as indicated on the United Nations Cartographic Website: http://www.un.org/Depts/Cartographic/english/htmain.htm

Standard Order Process
Digital Form
Digital Transfer Information

1.035

ArcGIS, or ArcView with Spatial Analyst extension. Metadata can be read directly in ArcCatalog or in a Web browser using the HTML pages provided separately.

Metadata Reference Information

20090203

Metadata Contact
Contact Information
Contact Person Primary

Eddy DE PAUW

International Center for Agricultural Research in Dry Areas (ICARDA)

Consultant, Geoinformatics Unit

Contact Address

mailing address

ICARDA, P.O. Box 114/5055

Beirut

Beirut

REQUIRED: The ZIP or other postal code of the address.

Lebanon

+963-21-2213433

+963-2169-2470

e.de-pauw@cgiar.org

FGDC Content Standards for Digital Geospatial Metadata

FGDC-STD-001-1998

local time

None

None

metextns

http://www.esri.com/metadata/esriprof80.html

ESRI Metadata Profile

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