Regions of Department of Water and Sanitation (interim)
dwafreg
Institute for Water Quality Studies metadata.
Summary created by Elna with catalog.aml on 1999-04-01 - 14:32:54
File owner: elise, last modified: 1 Apr (less than 1yr ago)
Map extent:
| -1432172W | . | 1384198E |
| -1551264S | - |  | - | -1551264S |
| -3934894S | . | . | . | -3934894S |
| -1432172W | . | 1384198E |
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
500000
Date
1998-05
Description
Regions of Department of Water and Sanitation (interim)
Owner
Department of Water and Sanitation
Owner_address
Department of Water and Sanitation
Private Bag X313
PRETORIA
0001
Owner_contact
Frans le Roux, Boskop Office (Potchefstroom)
Owner_country
South Africa
Owner_phone
(0148) 298 1113
Owner_fax
(0148) 298 1175
Owner_email
Disclaimer
No responsibility for the accuracy of this temporary data set is accepted.
Copyright_message
Used provincial boundaries
Copyright_warning
Use at own risk
History
1997 - Frans le Roux compiled and digitised map from information
supplied by the provincial regions of DWAF. DRAFT MAP!!!
1997 - Michael Silberbauer used this map to generate an even less
accurate map, using the original provincial borders as a guide.
This process introduced additional errors, up to 2.5 km.
Poly attributes CLASS: DWAF region or Country
NAME : Name in upper case
DWAF_REGION : Name of region in proper case
DWAF_SUBREG : Name of sub-region in proper case
Arc attributes TYPE : I = international border (no river)
i = international border (river)
C = coastline
X = imaginary line to close polygon
R = regional boundary (not on province border)
r = regional boundary (same as province)
S = sub-regional boundary
1998 - Michael Silberbauer added Gauteng sub-regions and modified Gauteng region border
Logo
$WMSYS/ptool/template/dwaf_logo
Arc items, 5kbyte:
15 May 1998, elise:
8 data fields
| ITEM | EXAMPLES | WIDTH | TYPE | REDEFINED? | INDEXED? |
|---|
| FNODE# | 1 | 4.0 | binary | | |
| TNODE# | 2 | 4.0 | binary | | |
| LPOLY# | 1 | 4.0 | binary | | |
| RPOLY# | 4 | 4.0 | binary | | |
| LENGTH | 1736.094360351 | 4.3 | floatpnt | | |
| DWAFREG# | 1 | 4.0 | binary | | |
| DWAFREG-ID | 71 | 4.0 | binary | | |
| TYPE | I | 1 | character | | |
Polygon items, 7kbyte:
15 May 1998, elise:
9 data fields
| ITEM | EXAMPLES | WIDTH | TYPE | REDEFINED? | INDEXED? |
|---|
| AREA | 390645579776 | 4.3 | floatpnt | | |
| PERIMETER | 10915386 | 4.3 | floatpnt | | |
| DWAFREG# | 1 | 4.0 | binary | | |
| DWAFREG-ID | 11 | 4.0 | binary | | |
| NAME | ZIMBABWE | 40 | character | | |
| CLASS | Country | 40 | character | | |
| Z | 0 | 4.0 | binary | | |
| DWAF_REGION | 'Northern Province' | 40 | character | | |
| DWAF_SUBREG | Gauteng_N | 40 | character | | |
Map specifications:
Description of SINGLE precision coverage /spek/waterm/wmdata/general/dwafreg
FEATURE CLASSES
Number of Attribute Spatial
Feature Class Subclass Features data (bytes) Index? Topology?
------------- -------- --------- ------------ ------- ---------
ARCS 187 30
POLYGONS 37 180 Yes
NODES 545
SECONDARY FEATURES
Tics 4
Arc Segments 52813
Polygon Labels 36
TOLERANCES
Fuzzy = 0.760 V Dangle = 0.000 V
COVERAGE BOUNDARY
Xmin = -1304155.375 Xmax = 1256181.375
Ymin = -3806877.500 Ymax = -1679280.375
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