Catchments of South Africa - primary

hca_primary

Institute for Water Quality Studies metadata.
Summary created by Elna with catalog.aml on 1999-04-01 - 14:34:31
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 - primary
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 quaternary coverage, separate coverage for primary

       catchments created - Mike Silberbauer.

Some of the fields included as attributes:

CMAP  Mean annual precipitation in mm

MAR   Mean annual runoff in mm

MAR4Q Mean annual runoff in million cubic metres

MARnQ Mean annual runoff in million cubic metres at the n-ary level

  Logo
/hri/db/clip/wrc

Annotation items, 4kbyte:
12 Mar (less than 1yr ago), elna:
Arc items, 6kbyte:
12 Mar (less than 1yr ago), elna:
8 data fields
ITEMEXAMPLESWIDTHTYPEREDEFINED?INDEXED?
FNODE#14.0 binary
TNODE#24.0 binary
LPOLY#14.0 binary
RPOLY#24.0 binary
LENGTH128289.2343754.3 floatpnt
HCA_PRIMARY#14.0 binary
HCA_PRIMARY-ID54.0 binary
TYPEI1 character

Polygon items, 1kbyte:
12 Mar (less than 1yr ago), elna:
7 data fields
ITEMEXAMPLESWIDTHTYPEREDEFINED?INDEXED?
AREA1095487078404.3 floatpnt
PERIMETER70368654.3 floatpnt
HCA_PRIMARY#14.0 binary
HCA_PRIMARY-ID14.0 binary
PRIMARYA1 character
PRIM-ID14.0 binary
MAR1Q2386.3410.2 numeric

Map specifications: 
Description of SINGLE precision coverage /spek/waterm/wmdata/general/hca_primar

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
ARCS                                      216        30
POLYGONS                                   23        32               Yes
NODES                                     195
ANNOTATIONS             (blank)            25

                               SECONDARY FEATURES

Tics                                      124
Arc Segments                            76895
Polygon Labels                             22

                                   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