Rivers of Lower Mekong Basin

Data format: SDE Feature Class

Coordinate system: Indian_1954_UTM_Zone_48N

Location: Server=mekserv3; Service=5153; Database=mrc; User=sde; Version=sde.DEFAULT
Abstract: Rivers of Lower Mekong Basin

ISO and ESRI Metadata:
Metadata elements shown with blue text are defined in the International Organization for Standardization's (ISO) document 19115 Geographic Information - Metadata. Elements shown with green text are defined by ESRI and will be documented as extentions to the ISO 19115. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog.
Metadata Information


*Metadata language: English
*Metadata character set: utf8 - 8 bit UCS Transfer Format


*Last update: 20050930


Metadata contact:
Individual's name: Kunthea Nuon
Organization's name: Mekong River Commission
Contact's position: GIS Specialist
Contact's role: publisher


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
No.184, Unit 18, Fa Ngoum Rd., Ban Sithane Neua
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mrcmekong.org

*Scope of the data described by the metadata: dataset
*Scope name: dataset


*Name of the metadata standard used: ISO 19115 Geographic Information - Metadata
*Version of the metadata standard: DIS_ESRI1.0


*Metadata identifier: {E8FCDF96-FE71-4C10-96E1-ECA56C2EF7BD}


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Resource Identification Information:


Citation:
Title: Rivers of Lower Mekong Basin


Reference date:
Date: 20011019
Type of date: creation

Reference date:
Date: 20011019
Type of date: publication

Edition date: 20011019
*Presentation format: digital map


Party responsible for the resource:
Individual's name: Ulf Hedlund
Organization's name: Mekong River Commission
Contact's position: GIS/Database Team Leader
Contact's role: point of contact


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
No.184, Unit 18, Fa Ngoum Rd., Ban Sithane Neua
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mecmekong.org

Party responsible for the resource:
Individual's name: Penroong Bamrungrach
Organization's name: Mekong River Commission
Contact's position: GIS Specialist
Contact's role: publisher


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
No.184, Unit 18, Fa Ngoum Rd., Ban Sithane Neua
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mrcmekong.org

Party responsible for the resource:
Individual's name: Kunthea Nuon
Organization's name: Mekong River Commission
Contact's position: GIS Specialist
Contact's role: publisher


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
No.184, Unit 18, Fa Ngoum Rd., Ban Sithane Neua
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mrcmekong.org

Abstract:
Rivers of Lower Mekong Basin

*Dataset language: English


Resource constraints:
Constraints:
Limitations of use: The Mekong River Commission make no warranties about this data and disclaim all responsibility and liability for all expenses, losses, damages and costs which may be incurred as a result of the data being inaccurate or incomplete in any way and for any reason. The data contained herein do not imply the expression of any opinion whatsoever on the part of the Mekong River Commission concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delineation of its frontiers or boundaries.


Legal constraints:
Access constraints: copyright, license


Use constraints: copyright, license


*Spatial representation type: vector


*Processing environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535


Spatial resolution:
Dataset's scale:
Scale denominator: 50,000

Resource's bounding rectangle:
*Extent type: Full extent in decimal degrees
*Extent contains the resource: Yes
*West longitude: 98.935562
*East longitude: 108.972101
*North latitude: 22.521431
*South latitude: 8.647802

Other extent information:
Geographic extent:
Bounding rectangle:
*Extent type: Full extent in the data's coordinate system
*Extent contains the resource: Yes
*West longitude: -124919.886279
*East longitude: 908808.253721
*North latitude: 2490338.997924
*South latitude: 960501.687924

Point of contact:
Individual's name: Ulf Hedlund
Organization's name: Mekong River Commission
Contact's position: GIS/Database Team Leader
Contact's role: point of contact


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
No.184, Unit 18, Fa Ngoum Rd., Ban Sithane Neua
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mecmekong.org

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Spatial Representation - Vector:


*Level of topology for this dataset: geometry only
Geometric objects:
*Name: mrc.SDE.WATER_b_riv50
*Object type: complexes
*Object count: 29101

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Reference System Information:


Reference system identifier:
*Value: Indian_1954_UTM_Zone_48N


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Data Quality Information:


Scope of quality information:
Level of the data: dataset


Lineage:
Lineage statement:
AREA: IN THE LOWER MEKONG BASIN INCLUDING:		 
- Cambodia 
- Laos 
- Thailand 
- Vietnam 


SOURCE MAP : American topo maps 1:50'000 and topo maps 1:100,000 (Thai part) 	 


SOURCE DATA SET: American topo maps 1:50'000 partially taken from 1:100,000, please refer to the b-sheet50 index coverage, or SOURCE item	 


SOURCE AGENCY : Watershed Classification Project (WSCP), MRCS
 

GENERATION-------------------

- Dataset was created by Watershed Classification Project (WSCP), MRCS	

- Dataset was further corrected (connected and flipped lines/psuedo node removed/named/coded) by MRC-TSD.(Nov 2004)  Improvement detailed as following:
    a) Improvement of this dataset was done following the criterias: 
	- using 1:50,000 scanned topomaps as referenced maps, rivers with name were kept and ones without name were eliminated.
	- using 1:50,000 scanned topomaps as referenced maps, remove double-line rivers and replace them with single-line rivers (re-digitize -following the middle channel of the river)
	-code and name the river, MRC hydrological coding system was applied.
    b) methodolgy used: geo-referenced scanned topomaps (1:50,000) were used as background references through out the editing processes.
	- rivers were clipped into individual subcatchment using subcatchment area derived from WSCP.
	- pseudo nodes were removed, lines of the same river were connected, all lines were flipped to the correct hydrological flow direction.
	- no-name rivers were removed
	- double-line rivers were replaced with new-digitized single-line rivers (following the middle channel between double lines).
	- names and codes of major tributaries were entered.  MRC-hydrological coding system/criteria from "Hydrological User Manual" (obtained from Hydrological Team) were applied.
		-River code = main river order and  tributary order
		   e.g. Lam Taklong R. is a tributary of Mun R.
			Code of Lam Taklong R = Mun R. order (38) and Lam Taklong R. order (07) = 3807
	- Since geo-referenced scanned maps were used as referenced maps, parts that were originally either in zone 47 or 49 were re-projected to the original zone in oder to be properly edited, and then re-projected back to zone 48 before putting back together as one piece of LMB river at final step.


STATUS:

- Compiled by A. Heinimann basen on sheetwise data (TA, WSCP), 19 October 2001   

- Last update by: MRC-TSD (Mr Touch Vina), 23 November 2004

- Completion status: vectors complete, hydrological (stream) order yet to be done


COMMENTS : As the river data set was a side product additionally done by the WSCP, the digitized vectors are not as accurate as the base maps used.


UNITS 

Map Units:	meters
System:		UTM, Zone 48 
Datum:		Indian 54 (inf_a), Spheroid Everest	


ARC ATTRIBUTE TABLE (aat) 
RIV_CODE - code of river using the same coding system as subcatchment.
RIV_CLASS - classes of the stream/river, where
 			I - Intermittent
 			P - Perennial
 			C - canal
 			L - lake
 			NA - topo-sheet is not accessible for referencing
RIV_CROSS - two or more streams cross creating polylines - coded as 'Cross'
RIV_NAME - stream/river name

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Distribution Information:


Distributor:
Contact information:
Individual's name: MRC Secretariat
Organization's name: Mekong River Commission
Contact's position: Custodian
Contact's role: distributor


Contact information:
Phone:
Voice: +856 21 263 263
Fax: +856 21 263 264

Address:
Delivery point:
P.O. Box 6101
City: Sikhotlabong District, Vientiane
Postal code: 01000
Country: Lao PDR
e-mail address: mrcs@mrcmekong.org

Available format:
*Format name: SDE Feature Class
Format version: ArcGIS 8.3


Ordering process:
Terms and fees: Visit http://www.mrcmekong.org
Instructions:
Visit http://www.mrcmekong.org

Transfer options:
Online source:
*Online location (URL): Server=mekserv3; Service=5153; Database=mrc; User=sde; Version=sde.DEFAULT
*Connection protocol: ArcSDE Connection
Function performed: information
Description: Downloadable Data

Medium of distribution:
Medium name: CD-ROM


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Binary Enclosures:


Thumbnail:
Enclosure type: Picture



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