hca_secondary

Catchments of South Africa - secondary

hca_secondary

Institute for Water Quality Studies metadata.
Summary created by Elna with catalog.aml on 1999-04-01 - 14:35:08
File owner: elna, last modified: 1 Apr (less than 1yr ago)
Map extent:

	-812452W	.	957182E
-2319445S	-		-	-2319445S
-3887253S	.	.	.	-3887253S
	-812452W	.	957182E

Projection information (see end of this page for details)
Projection ALBERS latitude of projection's origin 0 0 0.000
Units METERS Spheroid CLARKE1880

Scale
1000000
Date
1990
Description
Catchments of South Africa - secondary
Owner
Water Research Commission
Owner_address
Water Research Commission
PO Box 824
PRETORIA
0001
Owner_contact
Hugo Maaren
Owner_country
South Africa
Owner_phone
(012) 330 0340
Owner_fax
(012)
Owner_email
hugo@wrc.ccwr.ac.za
Disclaimer
No responsibility for the accuracy of the data is accepted.
Copyright_message
Raw data from a variety of State and private sources
Copyright_warning
Data products may only be used for water research.
History


1996 - Water Research Commission report number 298/1/94

       (DC Midgley, WV Pitman & BJ Middleton, Surface Water Resources of

        South Africa 1990 - User's Manual - ISBN 1 86845 143 7)

1996 - CATNUM dropped from hca_4, separate coverage created for secondary

       catchments created - Mike Silberbauer.

See quaternary coverage for attribute details.

  Logo

/hri/db/clip/wrc

Annotation items, 4kbyte:
12 Mar (less than 1yr ago), elna:
Polygon items, 7kbyte:
12 Mar (less than 1yr ago), elna:
11 data fields

ITEM	EXAMPLES	WIDTH	TYPE	REDEFINED?
AREA	15768259584	4.3	floatpnt
PERIMETER	7036865	4.3	floatpnt
HCA_SECONDARY#	1	4.0	binary
HCA_SECONDARY-ID	1	4.0	binary
SECONDARY	A7	2	character
SCND-ID	1	4.0	binary
MAR2Q	71.9	10.2	numeric
PRIM-ID	1	4.0	binary
PRIMARY	A	1	character
MAR1Q	2386.34	10.2	numeric
SEC_DIGIT	7	1	character	(ReDefined)

Map specifications:

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

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
ARCS                                      578
POLYGONS                                  149        48               Yes
NODES                                    4145
ANNOTATIONS             (blank)            25

                               SECONDARY FEATURES

Tics                                      124
Arc Segments                           148454
Polygon Labels                            148

                                   TOLERANCES

Fuzzy   =                 0.766 V          Dangle  =                 0.000 N

                               COVERAGE BOUNDARY

Xmin =              -732014.125            Xmax =               876744.312
Ymin =             -3806815.250            Ymax =             -2399882.500

                                     STATUS

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

                          COORDINATE SYSTEM DESCRIPTION

Projection               ALBERS
Units                    METERS             Spheroid             CLARKE1880
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