matlab_class/gcmfaces_IO/grid_load.m

function []=grid_load(dirGrid,nFaces,fileFormat,memoryLimit,omitNativeGrid);
%object:    load grid information, convert it to gcmfaces format
%           and encapsulate it in the global mygrid structure.
%inputs:    dirGrid is the directory where the grid files (gcm output) can be found.
%           nFaces is the number of faces in this gcm set-up of current interest.
%           fileFormat is the file format ('straight','cube','compact')
%optional:  memoryLimit is a flag that allows the user to omit secondary
%               grid fields in case memory/storage become an issue. It
%               takes 3 values : (0; the default) includes everything
%               (1) omits all 3D fields but hFacC (2) only loads XC & YC.
%           omitNativeGrid is a flag (0 by default) to bypass (when flag 1)
%               grid_load_native and grid_load_native_RAZ calls (that can
%               complement mygrid based upon e.g. tile*.mitgrid files)

if isempty(whos('memoryLimit')); memoryLimit=0; end;
if isempty(whos('omitNativeGrid')); omitNativeGrid=0; end;

gcmfaces_global; mygrid=[];

if nargin==0;%assume that LLC90 grid is used
  if ~isempty(dir('nctiles_grid')); 
    mygrid.dirGrid=[pwd filesep 'nctiles_grid' filesep];
    mygrid.fileFormat='nctiles';
  elseif ~isempty(dir('GRID'));
    mygrid.dirGrid=[pwd filesep 'GRID' filesep];
    mygrid.fileFormat='compact';
  else;
     fprintf('\n The ECCO v4 grid can be obtained as follows: \n');
     fprintf([' wget --recursive ftp://mit.ecco-group.org/ecco_for_las/' ...
              'version_4/release1/nctiles_grid \n']);
     fprintf(' mv mit.ecco-group.org/ecco_for_las/version_4/release1/nctiles_grid . \n\n');
     error('could not find either ''nctiles_grid/'' or ''GRID/''');
  end;
  mygrid.nFaces=5;
  mygrid.gcm2facesFast=false;
  mygrid.memoryLimit=0;
  omitNativeGrid=isempty(dir([mygrid.dirGrid 'tile001.mitgrid']));
  %place holders:
  tmp1=NaN*zeros(90,270);
  tmp2=NaN*zeros(90,90);
  tmp3=NaN*zeros(270,90);
  mygrid.XC=gcmfaces({tmp1,tmp1,tmp2,tmp3,tmp3});
  mygrid.YC=gcmfaces({tmp1,tmp1,tmp2,tmp3,tmp3});
  mygrid.RC=NaN*zeros(50,1);
  clear tmp?;
else;%user specified settings
  mygrid.dirGrid=dirGrid;
  mygrid.nFaces=nFaces;
  mygrid.fileFormat=fileFormat;
  mygrid.gcm2facesFast=false;
  mygrid.memoryLimit=memoryLimit;
end;

if mygrid.memoryLimit>0;
    gcmfaces_msg(['* Warning from grid_load : memoryLimit>0 ' ...
        'may precludes advanced gmcfaces functions.'],'');
end;
if mygrid.memoryLimit>1;
    gcmfaces_msg(['* Warning from grid_load : memoryLimit>1 ' ...
        'may only allow for basic fields displays.'],'');
end;

if strcmp(mygrid.fileFormat,'nctiles');
    mygrid.ioSize=[90 1170];
    mygrid.facesSize=[[90 270];[90 270];[90 90];[270 90];[270 90];[90 90]];
    mygrid.facesExpand=[];
elseif ~isempty(dir([mygrid.dirGrid 'grid.specs.mat']));
    specs=open([mygrid.dirGrid 'grid.specs.mat']);
    mygrid.ioSize=specs.ioSize;
    mygrid.facesSize=specs.facesSize;
    mygrid.facesExpand=specs.facesExpand;
    %example for creating grid.specs.mat, to put in dirGrid :
    %ioSize=[364500 1];
    %facesSize=[[270 450];[0 0];[270 270];[180 270];[450 270]];
    %facesExpand=[270 450];
    %save grid.specs.mat ioSize facesSize facesExpand;
elseif strcmp(mygrid.fileFormat,'compact');
    v0=rdmds([mygrid.dirGrid 'XC']);
    mygrid.ioSize=size(v0);
    nn=size(v0,1); pp=size(v0,2)/nn;
    mm=(pp+4-mygrid.nFaces)/4*nn;
    mygrid.facesSize=[[nn mm];[nn mm];[nn nn];[mm nn];[mm nn];[nn nn]];
    mygrid.facesExpand=[];
elseif strcmp(mygrid.fileFormat,'cube');
    v0=rdmds([mygrid.dirGrid 'XC']);
    mygrid.ioSize=size(v0);
    nn=size(v0,2);
    mygrid.facesSize=[[nn nn];[nn nn];[nn nn];[nn nn];[nn nn];[nn nn]];
    mygrid.facesExpand=[];
elseif strcmp(mygrid.fileFormat,'straight');
    v0=rdmds([mygrid.dirGrid 'XC']);
    mygrid.ioSize=size(v0);
    mygrid.facesSize=mygrid.ioSize;
    mygrid.facesExpand=[];
end;

mygrid.missVal=NaN;%will be set to 0 once the grid has been loaded.

if  ~(mygrid.nFaces==1&strcmp(mygrid.fileFormat,'straight'))&...
        ~(mygrid.nFaces==6&strcmp(mygrid.fileFormat,'cube'))&...
        ~(mygrid.nFaces==6&strcmp(mygrid.fileFormat,'compact'))&...
        ~(mygrid.nFaces==5&strcmp(mygrid.fileFormat,'compact'))&...
        ~(mygrid.nFaces==5&strcmp(mygrid.fileFormat,'nctiles'));
    error('non-supported grid topology');
end;

%the various grid fields:
if mygrid.memoryLimit==0;
    list0={'XC','XG','YC','YG','RAC','RAZ','DXC','DXG','DYC','DYG','hFacC','hFacS','hFacW','Depth'};
elseif mygrid.memoryLimit==1;
    list0={'XC','XG','YC','YG','RAC','RAZ','DXC','DXG','DYC','DYG','hFacC','Depth'};
elseif mygrid.memoryLimit==2;
    list0={'XC','YC'};
end;

for iFld=1:length(list0);
    if ~strcmp(mygrid.fileFormat,'nctiles');
      eval(['mygrid.' list0{iFld} '=rdmds2gcmfaces([mygrid.dirGrid ''' list0{iFld} '*'']);']);
    else;
      eval(['mygrid.' list0{iFld} '=read_nctiles([mygrid.dirGrid ''GRID''],''' list0{iFld} ''');']);
    end;
end;

%the vertical grid
list0={'RC','RF','DRC','DRF'};
for iFld=1:length(list0);
    if ~strcmp(mygrid.fileFormat,'nctiles');
      eval(['mygrid.' list0{iFld} '=squeeze(rdmds([mygrid.dirGrid ''' list0{iFld} '*'']));']);
    else;
      eval(['ncload ' mygrid.dirGrid 'GRID.0001.nc ' list0{iFld} ';']);
      eval(['mygrid.' list0{iFld} '=' list0{iFld} ''';']);
      if strcmp(list0{iFld},'RF'); mygrid.RF=[mygrid.RF;NaN]; end;
    end;
end;

%grid orientation
if mygrid.memoryLimit<2;
    list0={'AngleCS','AngleSN'};
    test0=~isempty(dir([mygrid.dirGrid 'AngleCS*']));
    if strcmp(mygrid.fileFormat,'nctiles');
        for iFld=1:length(list0);
            eval(['mygrid.' list0{iFld} '=read_nctiles([mygrid.dirGrid ''GRID''],''' list0{iFld} ''');']);
        end;
    elseif test0;
        for iFld=1:length(list0);
            eval(['mygrid.' list0{iFld} '=rdmds2gcmfaces([mygrid.dirGrid ''' list0{iFld} '*'']);']);
        end;
    else;
        warning('\n AngleCS/AngleSN not found; set to 1/0 assuming lat/lon grid.\n');
        mygrid.AngleCS=mygrid.XC; mygrid.AngleCS(:)=1;
        mygrid.AngleSN=mygrid.XC; mygrid.AngleSN(:)=0;
    end;
end;

%if grid is incomplete (blank tiles) then try to get 
%additional info from native grid, or apply missing value.
test0=sum(isnan(mygrid.XC))>0;
test1=prod(mygrid.ioSize)~=sum(isnan(NaN*mygrid.XC(:)));
if (test0|test1)&~omitNativeGrid;
  %treat fields that are part of the native grid
  mygrid1=mygrid; mygrid=[];
  grid_load_native(mygrid.dirGrid,nFaces,0);
  mygrid1.XC=mygrid.XC; mygrid1.YC=mygrid.YC;
  mygrid1.XG=mygrid.XG; mygrid1.YG=mygrid.YG;
  mygrid1.RAC=mygrid.RAC;
  mygrid=mygrid1;
  %apply missing value for fields that aren't
  list0={'hFacC','hFacS','hFacW','Depth','AngleCS','AngleSN'};
  for ii=1:length(list0); 
    eval(['tmp1=mygrid.' list0{ii} ';']);
    tmp1(isnan(tmp1))=0;
    eval(['mygrid.' list0{ii} '=tmp1;']);
  end;
  %and fix angles if needed
  tmp1=mygrid.AngleCS.^2+mygrid.AngleSN.^2;
  tmp1=1*(tmp1>0.999&tmp1<1.001);
  mygrid.AngleCS(tmp1==0)=1;
  mygrid.AngleSN(tmp1==0)=0;
end;

%get full RAZ (incl. 'extra line and column') needed for e.g. rotational computations
if mygrid.memoryLimit<2&~omitNativeGrid;
    grid_load_native_RAZ;
end;

%grid masks
if mygrid.memoryLimit<1;
    mygrid.hFacCsurf=mygrid.hFacC;
    for ff=1:mygrid.hFacC.nFaces; mygrid.hFacCsurf{ff}=mygrid.hFacC{ff}(:,:,1); end;
    
    mskC=mygrid.hFacC; mskC(mskC==0)=NaN; mskC(mskC>0)=1; mygrid.mskC=mskC;
    mskW=mygrid.hFacW; mskW(mskW==0)=NaN; mskW(mskW>0)=1; mygrid.mskW=mskW;
    mskS=mygrid.hFacS; mskS(mskS==0)=NaN; mskS(mskS>0)=1; mygrid.mskS=mskS;
end;

%zonal mean and sections needed for transport computations
if mygrid.memoryLimit<1;
    if ~isfield(mygrid,'mygrid.LATS_MASKS');
        gcmfaces_lines_zonal;
        mygrid.LATS=[mygrid.LATS_MASKS.lat]';
    end;
    if ~isfield(mygrid,'LINES_MASKS');
        [lonPairs,latPairs,names]=line_greatC_TUV_MASKS_v4;
        gcmfaces_lines_transp(lonPairs,latPairs,names);
    end;
end;

%to allow convert2gcmfaces/doFast:
if isempty(mygrid.facesExpand)&mygrid.memoryLimit<2;
    tmp1=convert2gcmfaces(mygrid.XC);
    tmp1(:)=[1:length(tmp1(:))];
    nn=length(tmp1(:));
    mygrid.gcm2faces=convert2gcmfaces(tmp1);
    mygrid.faces2gcmSize=size(tmp1);
    mygrid.faces2gcm=convert2gcmfaces(tmp1);
    for iFace=1:mygrid.nFaces;
        n=length(mygrid.gcm2faces{iFace}(:));
        mygrid.faces2gcm{iFace}=mygrid.gcm2faces{iFace}(:);
        mygrid.gcm2faces{iFace}=sparse([1:n],mygrid.gcm2faces{iFace}(:),ones(1,n),n,nn);
    end;
    mygrid.gcm2facesFast=true;
end;

%reset missVal parameter to 0. 
%Note : this is only used by convert2widefaces, for runs with cropped grids.
%Note : 0 should not be used as a fill for the grid itself (NaN was used).
mygrid.missVal=0;

1	gforget	1.13	function []=grid_load(dirGrid,nFaces,fileFormat,memoryLimit,omitNativeGrid);
2	gforget	1.5	%object: load grid information, convert it to gcmfaces format
3			% and encapsulate it in the global mygrid structure.
4			%inputs: dirGrid is the directory where the grid files (gcm output) can be found.
5			% nFaces is the number of faces in this gcm set-up of current interest.
6			% fileFormat is the file format ('straight','cube','compact')
7	gforget	1.9	%optional: memoryLimit is a flag that allows the user to omit secondary
8			% grid fields in case memory/storage become an issue. It
9			% takes 3 values : (0; the default) includes everything
10			% (1) omits all 3D fields but hFacC (2) only loads XC & YC.
11	gforget	1.13	% omitNativeGrid is a flag (0 by default) to bypass (when flag 1)
12			% grid_load_native and grid_load_native_RAZ calls (that can
13			% complement mygrid based upon e.g. tile*.mitgrid files)
14	gforget	1.1
15	gforget	1.9	if isempty(whos('memoryLimit')); memoryLimit=0; end;
16	gforget	1.13	if isempty(whos('omitNativeGrid')); omitNativeGrid=0; end;
17	gforget	1.9
18	gforget	1.7	gcmfaces_global; mygrid=[];
19
20	gforget	1.15	if nargin==0;%assume that LLC90 grid is used
21			if ~isempty(dir('nctiles_grid'));
22	gforget	1.16	mygrid.dirGrid=[pwd filesep 'nctiles_grid' filesep];
23	gforget	1.15	mygrid.fileFormat='nctiles';
24			elseif ~isempty(dir('GRID'));
25	gforget	1.16	mygrid.dirGrid=[pwd filesep 'GRID' filesep];
26	gforget	1.15	mygrid.fileFormat='compact';
27			else;
28	gforget	1.16	fprintf('\n The ECCO v4 grid can be obtained as follows: \n');
29			fprintf([' wget --recursive ftp://mit.ecco-group.org/ecco_for_las/' ...
30			'version_4/release1/nctiles_grid \n']);
31			fprintf(' mv mit.ecco-group.org/ecco_for_las/version_4/release1/nctiles_grid . \n\n');
32	gforget	1.15	error('could not find either ''nctiles_grid/'' or ''GRID/''');
33			end;
34			mygrid.nFaces=5;
35			mygrid.gcm2facesFast=false;
36			mygrid.memoryLimit=0;
37			omitNativeGrid=isempty(dir([mygrid.dirGrid 'tile001.mitgrid']));
38			%place holders:
39			tmp1=NaN*zeros(90,270);
40			tmp2=NaN*zeros(90,90);
41			tmp3=NaN*zeros(270,90);
42			mygrid.XC=gcmfaces({tmp1,tmp1,tmp2,tmp3,tmp3});
43			mygrid.YC=gcmfaces({tmp1,tmp1,tmp2,tmp3,tmp3});
44			mygrid.RC=NaN*zeros(50,1);
45			clear tmp?;
46			else;%user specified settings
47			mygrid.dirGrid=dirGrid;
48			mygrid.nFaces=nFaces;
49			mygrid.fileFormat=fileFormat;
50			mygrid.gcm2facesFast=false;
51			mygrid.memoryLimit=memoryLimit;
52			end;
53	gforget	1.9
54			if mygrid.memoryLimit>0;
55			gcmfaces_msg(['* Warning from grid_load : memoryLimit>0 ' ...
56			'may precludes advanced gmcfaces functions.'],'');
57			end;
58			if mygrid.memoryLimit>1;
59			gcmfaces_msg(['* Warning from grid_load : memoryLimit>1 ' ...
60			'may only allow for basic fields displays.'],'');
61			end;
62
63	gforget	1.15	if strcmp(mygrid.fileFormat,'nctiles');
64			mygrid.ioSize=[90 1170];
65			mygrid.facesSize=[[90 270];[90 270];[90 90];[270 90];[270 90];[90 90]];
66			mygrid.facesExpand=[];
67			elseif ~isempty(dir([mygrid.dirGrid 'grid.specs.mat']));
68			specs=open([mygrid.dirGrid 'grid.specs.mat']);
69	gforget	1.9	mygrid.ioSize=specs.ioSize;
70			mygrid.facesSize=specs.facesSize;
71			mygrid.facesExpand=specs.facesExpand;
72			%example for creating grid.specs.mat, to put in dirGrid :
73			%ioSize=[364500 1];
74			%facesSize=[[270 450];[0 0];[270 270];[180 270];[450 270]];
75			%facesExpand=[270 450];
76			%save grid.specs.mat ioSize facesSize facesExpand;
77	gforget	1.15	elseif strcmp(mygrid.fileFormat,'compact');
78			v0=rdmds([mygrid.dirGrid 'XC']);
79	gforget	1.9	mygrid.ioSize=size(v0);
80			nn=size(v0,1); pp=size(v0,2)/nn;
81			mm=(pp+4-mygrid.nFaces)/4*nn;
82	gforget	1.10	mygrid.facesSize=[[nn mm];[nn mm];[nn nn];[mm nn];[mm nn];[nn nn]];
83			mygrid.facesExpand=[];
84	gforget	1.15	elseif strcmp(mygrid.fileFormat,'cube');
85			v0=rdmds([mygrid.dirGrid 'XC']);
86	gforget	1.10	mygrid.ioSize=size(v0);
87			nn=size(v0,2);
88			mygrid.facesSize=[[nn nn];[nn nn];[nn nn];[nn nn];[nn nn];[nn nn]];
89			mygrid.facesExpand=[];
90	gforget	1.15	elseif strcmp(mygrid.fileFormat,'straight');
91			v0=rdmds([mygrid.dirGrid 'XC']);
92	gforget	1.10	mygrid.ioSize=size(v0);
93			mygrid.facesSize=mygrid.ioSize;
94	gforget	1.9	mygrid.facesExpand=[];
95			end;
96	gforget	1.15
97	gforget	1.12	mygrid.missVal=NaN;%will be set to 0 once the grid has been loaded.
98	gforget	1.1
99	gforget	1.15	if ~(mygrid.nFaces==1&strcmp(mygrid.fileFormat,'straight'))&...
100			~(mygrid.nFaces==6&strcmp(mygrid.fileFormat,'cube'))&...
101			~(mygrid.nFaces==6&strcmp(mygrid.fileFormat,'compact'))&...
102			~(mygrid.nFaces==5&strcmp(mygrid.fileFormat,'compact'))&...
103			~(mygrid.nFaces==5&strcmp(mygrid.fileFormat,'nctiles'));
104			error('non-supported grid topology');
105	gforget	1.1	end;
106
107	gforget	1.6	%the various grid fields:
108	gforget	1.9	if mygrid.memoryLimit==0;
109			list0={'XC','XG','YC','YG','RAC','RAZ','DXC','DXG','DYC','DYG','hFacC','hFacS','hFacW','Depth'};
110			elseif mygrid.memoryLimit==1;
111			list0={'XC','XG','YC','YG','RAC','RAZ','DXC','DXG','DYC','DYG','hFacC','Depth'};
112			elseif mygrid.memoryLimit==2;
113			list0={'XC','YC'};
114			end;
115
116	gforget	1.1	for iFld=1:length(list0);
117	gforget	1.15	if ~strcmp(mygrid.fileFormat,'nctiles');
118			eval(['mygrid.' list0{iFld} '=rdmds2gcmfaces([mygrid.dirGrid ''' list0{iFld} '*'']);']);
119			else;
120			eval(['mygrid.' list0{iFld} '=read_nctiles([mygrid.dirGrid ''GRID''],''' list0{iFld} ''');']);
121			end;
122	gforget	1.1	end;
123
124	gforget	1.9	%the vertical grid
125			list0={'RC','RF','DRC','DRF'};
126			for iFld=1:length(list0);
127	gforget	1.15	if ~strcmp(mygrid.fileFormat,'nctiles');
128			eval(['mygrid.' list0{iFld} '=squeeze(rdmds([mygrid.dirGrid ''' list0{iFld} '*'']));']);
129			else;
130			eval(['ncload ' mygrid.dirGrid 'GRID.0001.nc ' list0{iFld} ';']);
131			eval(['mygrid.' list0{iFld} '=' list0{iFld} ''';']);
132			if strcmp(list0{iFld},'RF'); mygrid.RF=[mygrid.RF;NaN]; end;
133			end;
134	gforget	1.9	end;
135
136			%grid orientation
137			if mygrid.memoryLimit<2;
138			list0={'AngleCS','AngleSN'};
139	gforget	1.15	test0=~isempty(dir([mygrid.dirGrid 'AngleCS*']));
140			if strcmp(mygrid.fileFormat,'nctiles');
141			for iFld=1:length(list0);
142			eval(['mygrid.' list0{iFld} '=read_nctiles([mygrid.dirGrid ''GRID''],''' list0{iFld} ''');']);
143			end;
144			elseif test0;
145	gforget	1.9	for iFld=1:length(list0);
146	gforget	1.15	eval(['mygrid.' list0{iFld} '=rdmds2gcmfaces([mygrid.dirGrid ''' list0{iFld} '*'']);']);
147	gforget	1.9	end;
148			else;
149			warning('\n AngleCS/AngleSN not found; set to 1/0 assuming lat/lon grid.\n');
150			mygrid.AngleCS=mygrid.XC; mygrid.AngleCS(:)=1;
151			mygrid.AngleSN=mygrid.XC; mygrid.AngleSN(:)=0;
152	gforget	1.8	end;
153	gforget	1.4	end;
154
155	gforget	1.12	%if grid is incomplete (blank tiles) then try to get
156			%additional info from native grid, or apply missing value.
157			test0=sum(isnan(mygrid.XC))>0;
158			test1=prod(mygrid.ioSize)~=sum(isnan(NaN*mygrid.XC(:)));
159	gforget	1.13	if (test0\|test1)&~omitNativeGrid;
160	gforget	1.12	%treat fields that are part of the native grid
161			mygrid1=mygrid; mygrid=[];
162	gforget	1.15	grid_load_native(mygrid.dirGrid,nFaces,0);
163	gforget	1.12	mygrid1.XC=mygrid.XC; mygrid1.YC=mygrid.YC;
164	gforget	1.14	mygrid1.XG=mygrid.XG; mygrid1.YG=mygrid.YG;
165	gforget	1.12	mygrid1.RAC=mygrid.RAC;
166			mygrid=mygrid1;
167			%apply missing value for fields that aren't
168			list0={'hFacC','hFacS','hFacW','Depth','AngleCS','AngleSN'};
169			for ii=1:length(list0);
170			eval(['tmp1=mygrid.' list0{ii} ';']);
171			tmp1(isnan(tmp1))=0;
172			eval(['mygrid.' list0{ii} '=tmp1;']);
173			end;
174			%and fix angles if needed
175			tmp1=mygrid.AngleCS.^2+mygrid.AngleSN.^2;
176			tmp1=1*(tmp1>0.999&tmp1<1.001);
177			mygrid.AngleCS(tmp1==0)=1;
178			mygrid.AngleSN(tmp1==0)=0;
179			end;
180
181	gforget	1.11	%get full RAZ (incl. 'extra line and column') needed for e.g. rotational computations
182	gforget	1.13	if mygrid.memoryLimit<2&~omitNativeGrid;
183	gforget	1.11	grid_load_native_RAZ;
184			end;
185
186	gforget	1.9	%grid masks
187			if mygrid.memoryLimit<1;
188			mygrid.hFacCsurf=mygrid.hFacC;
189			for ff=1:mygrid.hFacC.nFaces; mygrid.hFacCsurf{ff}=mygrid.hFacC{ff}(:,:,1); end;
190
191			mskC=mygrid.hFacC; mskC(mskC==0)=NaN; mskC(mskC>0)=1; mygrid.mskC=mskC;
192			mskW=mygrid.hFacW; mskW(mskW==0)=NaN; mskW(mskW>0)=1; mygrid.mskW=mskW;
193			mskS=mygrid.hFacS; mskS(mskS==0)=NaN; mskS(mskS>0)=1; mygrid.mskS=mskS;
194	gforget	1.1	end;
195
196	gforget	1.9	%zonal mean and sections needed for transport computations
197			if mygrid.memoryLimit<1;
198			if ~isfield(mygrid,'mygrid.LATS_MASKS');
199			gcmfaces_lines_zonal;
200			mygrid.LATS=[mygrid.LATS_MASKS.lat]';
201			end;
202			if ~isfield(mygrid,'LINES_MASKS');
203			[lonPairs,latPairs,names]=line_greatC_TUV_MASKS_v4;
204			gcmfaces_lines_transp(lonPairs,latPairs,names);
205			end;
206			end;
207	gforget	1.2
208	gforget	1.8	%to allow convert2gcmfaces/doFast:
209	gforget	1.9	if isempty(mygrid.facesExpand)&mygrid.memoryLimit<2;
210			tmp1=convert2gcmfaces(mygrid.XC);
211			tmp1(:)=[1:length(tmp1(:))];
212			nn=length(tmp1(:));
213			mygrid.gcm2faces=convert2gcmfaces(tmp1);
214			mygrid.faces2gcmSize=size(tmp1);
215			mygrid.faces2gcm=convert2gcmfaces(tmp1);
216			for iFace=1:mygrid.nFaces;
217			n=length(mygrid.gcm2faces{iFace}(:));
218			mygrid.faces2gcm{iFace}=mygrid.gcm2faces{iFace}(:);
219			mygrid.gcm2faces{iFace}=sparse([1:n],mygrid.gcm2faces{iFace}(:),ones(1,n),n,nn);
220			end;
221			mygrid.gcm2facesFast=true;
222	gforget	1.6	end;
223
224	gforget	1.12	%reset missVal parameter to 0.
225			%Note : this is only used by convert2widefaces, for runs with cropped grids.
226			%Note : 0 should not be used as a fill for the grid itself (NaN was used).
227			mygrid.missVal=0;
228	gforget	1.1