This is MiscIrelandUTMCoord.m in view mode; [Download] [Up]
/*========================== MiscIrelandUTMCoord.m ==========================*/
/* MiscIrelandUTMCoord class contains and supports values representing
locations in an Irish Universal Transverse Mercator coordinate system
with airy values from post 1953 addendum.
DMA Release 0.8, Copyright @1993 by Genesis Project, Ltd. All Rights
Reserved. For further information on terms and conditions see:
Documentation/GISKit/Agreements-Legal-README
HISTORY
21-Mar-93 Dale Amon at GPL
Created.
*/
#import <misckit/miscgiskit.h>
@implementation MiscIrelandUTMCoord
/*===========================================================================*/
/* Internal methods */
/*===========================================================================*/
static id theIrishGrid = nil;
+ makeGrid
{
if (!theIrishGrid)
{theIrishGrid = [[MiscUTMConstants allocFromZone: [self zone]]
initGridName: "Irish Grid"
trueOrigin: 53.5 : -8.0
inGrid: 200000.0 : 250000.0
onSphere: 6377563.396 : 6356256.910
centralMeridianScaling: 1.000035];
[theIrishGrid setProtected];
}
return theIrishGrid;
}
/*===========================================================================*/
/* Initialization methods. If we don't already have a UTM constants object
for the Irish Grid, create one instance that all will share and that
cannot be deleted.
Values are from the Irish Ordinance Survey document, "Tables for the
Transverse Mercator Projection of Ireland", 1953, reprinted 1971, with
addendum for modified airy sphere.
*/
/*===========================================================================*/
/* DESIGNATED INITIALIZER */
-initDescription: (char *) txt
{
[super initDescription: txt constants: [MiscIrelandUTMCoord makeGrid]];
/* over ride the standard converter */
converter = [MiscIrelandCoordConverter new];
return self;
}
/*---------------------------------------------------------------------------*/
/* Block the designated initializer of our parent class */
-initDescription: (char *) txt constants: anObject
{ [self error:" %s class should not be sent '%s' messages\n",
[[self class] name], sel_getName(_cmd)];
return self;
}
/*===========================================================================*/
/* Archive methods */
/*===========================================================================*/
- awake
{ [super awake];
[constants setUnprotected];
[constants free];
[MiscIrelandUTMCoord makeGrid];
return self;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.