#####
## Mapx Grid and Projection Definitions
## Written by Scott Lewis
## (C)2008, National Snow and Ice Data Center
##
## This file describes the built-in Grid and Projection defintions available
## to use, if desired.
#####


======
GRIDS DEFINITIONS

Grids "files" are in the following format:

FILENAME
~~~~~~
PROJNAME
NUMCOLS NUMROWS
CPMU RPMU
ORIGINCOL ORIGINROW

The FILENAME is the name of the "file" to use.  The ~~~~~~ is not part of the
file contents, but the remaining 4 lines are.

PROJNAME indicates the "filename" of the Projection to use.  (See the 
PROJECTION DEFINITIONS section below).

NUMCOLS and NUMROWS are the number of columns and rows in the grid.

CPMU and RPMU is the number of columns or rows per map unit.

ORIGINCOL and ORIGINROW are the column and row values of the map origin.


The following are the built-in Grids definitions:

East.gpd
~~~~~~
East.mpp
1000 1000
1000 1000
500.0 500.0


Eorthographic.gpd
~~~~~~
Eorthographic.mpp
500.0 250.0
250.0 250.0
250.0 125.0


fiveminute.gpd
~~~~~~
onedegree.mpp
4320 2160
12 12
2159.5 1079.5


halfdegree.gpd
~~~~~~
onedegree.mpp
720 360
2 2
359.5 179.5


Mh.gpd
~~~~~~
M200correct.mpp
2766 1171
16 16
1382.0 585.0


Ml.gpd
~~~~~~
M200correct.mpp
1383 586
8 8
691.0 292.5


MOD_Sin.gpd
~~~~~~
Sinusoidal.mpp
3600 1800
1 1
1800 900


Moll1:100.gpd
~~~~~~
Mollweide.mpp
781.0 344.0
24.0 24.0
390.5 172.0


Moll1:160.gpd
~~~~~~
Mollweide.mpp
490.0 216.0
15.0 15.0
245.0 108.0


Moll1:40.gpd
~~~~~~
Mollweide.mpp
2160.0 1080.0
60.0 60.0
1080.0 540.0


Moll1:80.gpd
~~~~~~
Mollweide.mpp
974.0 427.0
30.0 30.0
487.0 213.5


Moll.gpd
~~~~~~
Mollweide.mpp
490.0 216.0
15.0 15.0
245.0 108.0


N3A.gpd
~~~~~~
Nps.mpp
608 896
8 8
307.5 467.5


N3B.gpd
~~~~~~
Nps.mpp
304 448
4 4
153.5 233.5


Na1.gpd
~~~~~~
N200avhrr.mpp
7220 7220
160 160
3609.5 3609.5


Na25.gpd
~~~~~~
N200correct.mpp
361 361
8 8
180.5 180.5


Na5.gpd
~~~~~~
N200correct.mpp
1805 1805
40 40
902.5 902.5


Nh.gpd
~~~~~~
N200correct.mpp
1441 1441
16 16
720.0 720.0


Nl.gpd
~~~~~~
N200correct.mpp
721 721
8 8 
360.0 360.0


North.gpd
~~~~~~
North.mpp
1000 1000
1000 1000
500.0 500.0


NpathP.gpd
~~~~~~
NpathP.mpp
67 67
1 1
33 33


onedegree.gpd
~~~~~~
onedegree.mpp
360 180
1 1
179.5 89.5


quarterdegree.gpd
~~~~~~
onedegree.mpp
1440 720
4 4
719.5 359.5


S3A.gpd
~~~~~~
Sps.mpp
632 644
8 8
315.5 347.5


S3B.gpd
~~~~~~
Sps.mpp
316 332
4 4
157.5 157.5


Sa1.gpd
~~~~~~
S200avhrr.mpp
6420 6420
160 160
3209.5 3209.5


Sa25.gpd
~~~~~~
S200correct.mpp
321 321
8 8
160.0 160.0


Sa5.gpd
~~~~~~
S200correct.mpp
1605 1605
40 40
802.5 802.5


Sh.gpd
~~~~~~
S200correct.mpp
1441 1441
16 16
720.0 720.0


Sl.gpd
~~~~~~
S200correct.mpp
721 721
8 8
360.0 360.0


South.gpd
~~~~~~
South.mpp
1000 1000
1000 1000
500.0 500.0


thirtyseconds.gpd
~~~~~~
onedegree.mpp
43200 21600
120 120
21599.5 10799.5


West.gpd
~~~~~~
West.mpp
1000 1000
1000 1000
500.0 500.0


World.gpd
~~~~~~
World.mpp
2000 1000
1000 1000
1000.0 500.0


Worthographic.gpd
~~~~~~
Worthographic.mpp
500.0 250.0
250.0 250.0
250.0 125.0




======
PROJECTION DEFINITIONS

Projection "files" are in the following format:

FILENAME
~~~~~~
PROJ
LAT0 LON0 LAT1 LON1
ROTATE
SCALE
CENTERLAT CENTERLON
NORTH SOUTH
WEST EAST
LATINTERVAL LONINTERVAL
LATLABEL LONLABEL
CIL BDY RIV
RADIUS
ECCENTRICITY

The FILENAME is the "file" to use.  The ~~~~~~ is not part of the file 
contents, but all lines below it are part of the file.

PROJ is the Projection class to use.  See mapx_projections.txt for a list of
projections.  (Note that the projections shown here may be displayed with 
different spaces and punctuation.  The code strips out all spaces and 
punctuation before checking for projection type, so these differences are
irrelevant.

LAT0, LON0, LAT1, and LON1 are projection specific parameters.  LAT1 and LON1
are not always used, and are sometimes omitted.  LAT0 and LON0 however must
always have values.

ROTATE is the projection rotation.

SCALE is the projection scale; usually this is at the projection center, but
some projections have scale set for other locations.  See mapx_projections.txt
for details.

CENTERLAT and CENTERLON are the center coordinates for the map.  This will 
usually be the same as the projection center, but isn't always so; if they are
different, conversions will be offset appropriately.

NORTH, SOUTH, WEST, and EAST are the boundaries of the projection.

LATINTERVAL and LONINTERVAL are used when drawing the map, and indicates the
interval in which latitude/longitude lines are drawn.  Mapx does not use these
values currently, but they are required to be in the "file".

LATLABEL and LONLABEL are used when drawing the map to label the latitude/
longitude lines.  Mapx does not use these values, but they are required to be
in the "file"

CIL, BDY, and RIV are various detail flags for drawing a map.  Mapx does not
use these values, but they are required to be in the "file".

RADIUS is the equatorial radius of the projection.  This is an optional line
(though it is required if the ECCENTRICITY line is included).  If omitted,
a default radius of 6371.228 will be used.

ECCENTRICITY is the eccentricity to use for the projection.  This value only
has meaning for elliptical projections.  It may be omitted, but if it is,
a default value of 0.082271673 will be used if necessary.


Note that all Latitude values are in degrees north; positive values represent
north latitudes, negative values represent south.  Longitude values are all 
in degrees east, with positive values representing east and negative values
representing west.


The following are the built-in projection definitions:


------

East.mpp
~~~~~~
Orthographic
0.0 90.0 999 999
0.0
13000.0
0.0 90.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 0.0
1 0 0


Eorthographic.mpp
~~~~~~
Orthographic
0.0 90.0 999.0 999.0
0.0
13000.0
0.0 90.0
-90.0 90.0
0.0 180.0
30.0 30.0
0.0 0.0
1 0 0
6371.228
0.08227167


M200correct.mpp
~~~~~~
Cylindrical-Equal-Area
0.0 0.0 30.0
0.0
200.5402
0.0 0.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 0.0
1 0 0


Mollweide.mpp
~~~~~~
Mollweide
0 0 0 999
0
1111.9894
0 0
-90 90
-180 180
30 30
0 180
1 0 0
6371.23
0.0822717


N200avhrr.mpp
~~~~~~
Azimuthal-Equal-Area
90.0 0.0
0.0
200.5402
90.0 0.0
0.0 90.0
-180.0 180.0
15.0 30.0
0.0 0.0
1 0 0


N200correct.mpp
~~~~~~
Azimuthal-Equal-Area
90.0 0.0
0.0
200.5402
90.0 0.0
0.0 90.0
-180.0 180.0
15.0 30.0
0.0 0.0
1 0 0


North.mpp
~~~~~~
PolarStereographic
90.0 0.0 999 999
0.0
26000.0
90.0 0.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 180.0
1 0 0


NPathP.mpp
~~~~~~
Azimuthal-Equal-Area
90.0 90.0
0.0
100.2701
90.00 00.00
0.00 90.00
-180.00 180.00
5.00 20.00
0.00 0.00
1 0 0


Nps.mpp
~~~~~~
PolarStereographicEllipsoid
90.0 -45.0 70.0
0.0
100.0
90.00 135.00
20.00 90.00
-180.00 180.00
10.00 150.00
00.00 00.00
1 0 0
6378.273
0.081816153


onedegree.mpp
~~~~~~
CylindricalEquidistant
0.0 0.0 0.0
0.0
1.0
0.0 0.0
-90.0 90.0
-180.0 180.0
10.00 10.00 
0.00 00.00
1 0 0
57.295780


S200avhrr.mpp
~~~~~~
Azimuthal-Equal-Area
-90.0 0.0
0.0
200.5402
-90.0 0.0
-90.0 0.0
-180.0 180.0
15.0 30.0
0.0 0.0
1 0 0


S200correct.mpp
~~~~~~
Azimuthal-Equal-Area
-90.0 0.0
0.0
200.5402
-90.0 0.0
-90.0 0.0
-180.0 180.0
15.0 30.0
0.0 0.0
1 0 0


Sinusoidal.mpp
~~~~~~
Sinusoidal
0 0 0 999
0.0
11.119894
0.0 0.0
-90 90
-180 180
30 30
0.0 0.0
1 0 0
6371.23
0.0822717


South.mpp
~~~~~~
PolarStereographic
-90.0 0.0 999 999
0.0
26000.0
-90.0 0.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 180.0
1 0 0


Sps.mpp
~~~~~~
PolarStereographicEllipsoid
-90.0 0.0 -70.0
0.0
100.0
-90.00 0.00
-90.00 -20.00
-180.00 180.00
10.00 15.00
0.00 0.00
1 0 0
6378.273
0.081816153


SWorld.mpp
~~~~~~
CylindricalEquidistant
0.0 0.0 0.0 999
0.0
20000.0
0.0 180.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 180.0
1 0 0


West.mpp
~~~~~~
Orthographic
0.0 -90.0 999 999
0.0
13000.0
0.0 -90.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 0.0
1 0 0


world.mpp
~~~~~~
CylindricalEquidistant
0 0 0 999
0
20000
0 0
-90 90
-180 180
30 30
0 180
1 0 0
6371.23
0.0822717


World.mpp
~~~~~~
CylindricalEquidistant
0.0 0.0 0.0 999
0.0
20000.0
0.0 0.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 0.0
1 0 0


Worthographic.mpp
~~~~~~
Orthographic
0.0 -90.0 999.0 999.0
0.0
13000.0
0.0 -90.0
-90.0 90.0
-180.0 180.0
30.0 30.0
0.0 0.0
1 0 0
6371.228
0.08227167