wri_500

South African rivers

wri_500

Institute for Water Quality Studies metadata.
Summary created by Elna with catalog.aml on 1999-04-01 - 15:01:32
File owner: elise, last modified: 1 Apr (less than 1yr ago)
Map extent:

	-812023W	.	948359E
-2319925S	-		-	-2319925S
-3880529S	.	.	.	-3880529S
	-812023W	.	948359E

Projection information (see end of this page for details)
Projection ALBERS latitude of projection's origin 0 0 0.000
Units METERS Spheroid CLARKE1866

Scale
500000
Date
1994
Description
South African rivers
Owner
Chief Directorate of Surveys and Land Information
Owner_address
Department of Land Affairs
Private Bag
MOWBRAY
7705
Owner_contact
Thomas Krieg
Owner_country
South Africa
Owner_phone
(021) 685 4070 x 143
Owner_fax
(021) 689 1351
Owner_email
xxx@xxx.xxx.gov.za
Disclaimer

Copyright_message
State Copyright
Copyright_warning
State data - not in the public domain
Copies of digital data may not be given to third parties
History


1994 - Digital data supplied to Department of Water and Sanitation

1995 - Rivers selected to match national monitoring network by GisLAB

 - Gaps in rivers at dams closed

 - Rivers made to point downstream

 - River names checked

 - WARNING - may be wrong spheroid (Clarke1866) which means errors up to

             100 metres in furthest extremities.

  Logo

../images/s&li

Arc items, 1065kbyte:
31 Oct 1995, elise:
12 data fields

ITEM	EXAMPLES	WIDTH	TYPE	INDEXED?
FNODE#	1	4.0	binary
TNODE#	3	4.0	binary
LPOLY#	2	4.0	binary
RPOLY#	2	4.0	binary
LENGTH	6301.582519531	4.3	floatpnt
WRI_500#	1	4.0	binary
WRI_500-ID	991	4.0	binary
NAME	Limpopo	40	character	(Indexed)
CLASS	Perennial_river	40	character
Z	0	4.0	binary
ORDER	5	4.0	binary	(Indexed)
PRIMARY	A	1	character

Map specifications:

  Description of SINGLE precision coverage /spek/waterm/wmdata/general/wri_500

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
ARCS                                     9238       118      Yes
NODES                                   43824

                               SECONDARY FEATURES

Tics                                     1167
Arc Segments                           380877

                                   TOLERANCES

Fuzzy   =               160.035 N          Dangle  =                 0.000 N

                               COVERAGE BOUNDARY

Xmin =              -732005.938            Xmax =               868341.750
Ymin =             -3800511.750            Ymax =             -2399942.500

                                     STATUS

The coverage has not been Edited since the last BUILD or CLEAN.

                          COORDINATE SYSTEM DESCRIPTION

Projection               ALBERS
Units                    METERS             Spheroid             CLARKE1866
Parameters:
1st standard parallel                                  -18  0  0.000
2nd standard parallel                                  -32  0  0.000
central meridian                                        24  0  0.000
latitude of projection's origin                          0  0  0.000
false easting (meters)                                       0.00000
false northing (meters)                                      0.00000