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process_dist.m
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process_dist.m
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%%%%%%%%%%%%%% Process distance matricies %%%%%%%%%%%%%%%%%%%%%%%%%%%
tic
cd X:\CentralAmericaData\Model_inputs
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%% Load template geotiff distance to coast %%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This script finds the minimum linear distance to the coastline in each
% cardinal direction, and takes the global minimum to create a single
% distance to coast raster
[Zpop,Rpop]=geotiffread('lspop2001_250.tif');
Zpop=double(Zpop);
NoDataVal=max(max(Zpop));
subzpop=Zpop(1:1200,1:800);
subzpop(subzpop == NoDataVal)=mean(mean(subzpop));
Zpop(1:1200,1:800)=subzpop;
% % %%%% Make a test raster
% subZ=Z(1350:1650,3700:4000);
% imagesc(subZ)
% subR = R;
% subR.RasterSize=size(subZ);
% subR.LatitudeLimits=[R.LatitudeLimits(2)-1800*R.CellExtentInLatitude ...
% R.LatitudeLimits(2)-1400*R.CellExtentInLatitude];
% subR.LongitudeLimits=[R.LongitudeLimits(1)+3600*R.CellExtentInLongitude ...
% R.LongitudeLimits(1)+4000*R.CellExtentInLongitude];
% % subR.RasterExtentInLatitude=subR.LatitudeLimits(2)-subR.LatitudeLimits(1);
% % subR.RasterExtentInLongiitude=subR.LongitudeLimits(1)-subR.LongitudeLimits(1);
% subR.ColumnsStartFrom=R.ColumnsStartFrom;
% subR.RowsStartFrom=R.RowsStartFrom;
% subR.CellExtentInLatitude=R.CellExtentInLatitude;
% subR.CellExtentInLongitude=R.CellExtentInLongitude;
% % testcoastdist=zeros(size(subZ));
% NoDataVal=255;
% comparestack=repmat(zeros(size(subZ)),1,1,4);
% celldist=0.250; %250 meter resolution dataset
% % matrix to minimize
% maxval=max(size(subZ));
% indmat=(maxval+1)*ones(size(subZ));
% % edge check
% % can I modify this to deal with irregular coastlines?
% w_edgechk=repmat((subZ(:,1) == NoDataVal),1,length(subZ(1,:)));
% e_edgechk=repmat((subZ(:,length(subZ(1,:))) == NoDataVal),1,length(subZ(1,:)));
% n_edgechk=repmat((subZ(1,:) == NoDataVal),length(subZ(:,1)),1);
% s_edgechk=repmat((subZ(length(subZ(:,1)),:) == NoDataVal),length(subZ(:,1)),1);
% % calc distance from edges
%
% % deal with irregular coastlines
% testvec=west2east(25,1:50);
% diffvec=diff(testvec,1,2);
% idiff=find(diffvec == 0);
% testvec(1+idiff)=testvec(idiff+1)-testvec(idiff);
%
%
% testvec=north2south(1:50,25);
% diffvec=diff(testvec,1,1);
% idiff=find(diffvec == 0);
% testvec(1+idiff)=testvec(idiff+1)-testvec(idiff);
%
% logiclyr=(subZ ~= NoDataVal);
% west2east=cumsum(logiclyr,2);
% wdiff=diff(west2east,1,2);
% iwdiff=find(wdiff == 0);
% [rowdiff,coldiff]=ind2sub(size(wdiff),iwdiff);
% ishft=sub2ind(size(west2east),rowdiff,coldiff+1);
% west2east(ishft)=west2east(ishft)-west2east(iwdiff);
% comparestack(:,:,1)=west2east;
%
% east2west=cumsum(logiclyr(:,length(logiclyr(1,:)):-1:1),2);
% ediff=diff(east2west,1,2);
% iediff=find(ediff == 0);
% [rowdiff,coldiff]=ind2sub(size(ediff),iediff);
% ishft=sub2ind(size(east2west),rowdiff,coldiff+1);
% east2west(ishft)=east2west(iediff)-east2west(ishft);
% east2west=fliplr(east2west);
% comparestack(:,:,2)=east2west;
%
% north2south=flipud(rot90(cumsum(logiclyr,1),1));
% ndiff=diff(north2south,1,2);
% indiff=find(ndiff == 0);
% [rowdiff,coldiff]=ind2sub(size(ndiff),indiff);
% ishft=sub2ind(size(north2south),rowdiff,coldiff+1);
% north2south(ishft)=north2south(ishft)-north2south(indiff);
% north2south=rot90(flipud(north2south),-1);
% comparestack(:,:,3)=north2south;
%
% south2north=rot90(flipud(cumsum(logiclyr(length(logiclyr(:,1)):-1:1,:),1)),-1);
% sdiff=diff(south2north,1,2);
% isdiff=find(sdiff == 0);
% [rowdiff,coldiff]=ind2sub(size(sdiff),isdiff);
% ishft=sub2ind(size(south2north),rowdiff,coldiff+1);
% south2north(ishft)=south2north(ishft)-south2north(isdiff);
% south2north=rot90(south2north,1);
% comparestack(:,:,4)=south2north;
% % filter based on edge check and select minimum distance for each cell
% w2e=indmat;
% w2e(w_edgechk == 1)=west2east(w_edgechk == 1);
% comparestack(:,:,1)=w2e;
% e2w=indmat;
% e2w(e_edgechk == 1)=east2west(e_edgechk == 1);
% comparestack(:,:,2)=e2w;
% n2s=indmat;
% n2s(n_edgechk == 1)=north2south(n_edgechk == 1);
% comparestack(:,:,3)=n2s;
% s2n=indmat;
% s2n(s_edgechk == 1)=south2north(s_edgechk == 1);
% comparestack(:,:,4)=s2n;
% testcoastdist=celldist*min(comparestack,[],3);
comparestack=repmat(zeros(size(Zpop)),1,1,4);
celldist=0.250; %250 meter resolution dataset
% matrix to minimize
maxval=max(size(Zpop));
indmat=(maxval+1)*ones(size(Zpop));
% edge check
% w_edgechk=repmat((Zpop(:,1) == NoDataVal),1,length(Zpop(1,:)));
% e_edgechk=repmat((Zpop(:,length(Zpop(1,:))) == NoDataVal),1,length(Zpop(1,:)));
% n_edgechk=repmat((Zpop(1,:) == NoDataVal),length(Zpop(:,1)),1);
% s_edgechk=repmat((Zpop(length(Zpop(:,1)),:) == NoDataVal),length(Zpop(:,1)),1);
w_edgechk=(cummax(Zpop,2) == NoDataVal);
e_edgechk=fliplr((cummax(fliplr(Zpop),2) == NoDataVal));
n_edgechk=(cummax(Zpop,1) == NoDataVal);
s_edgechk=flipud((cummax(flipud(Zpop),1) == NoDataVal));
% calc distance from edges
logiclyr=(Zpop ~= NoDataVal);
west2east=cumsum(logiclyr,2);
wdiff=diff(west2east,1,2);
iwdiff=find(wdiff == 0);
[rowdiff,coldiff]=ind2sub(size(wdiff),iwdiff);
ishft=sub2ind(size(west2east),rowdiff,coldiff+1);
wdiffmat=zeros(size(west2east));
wdiffmat(ishft)=west2east(ishft);
west2east=west2east-cummax(wdiffmat,2);
% west2east(ishft)=west2east(ishft)-west2east(iwdiff);
comparestack(:,:,1)=west2east;
east2west=cumsum(fliplr(logiclyr),2);
ediff=diff(east2west,1,2);
iediff=find(ediff == 0);
[rowdiff,coldiff]=ind2sub(size(ediff),iediff);
ishft=sub2ind(size(east2west),rowdiff,coldiff+1);
ediffmat=zeros(size(east2west));
ediffmat(ishft)=east2west(ishft);
east2west=east2west-cummax(ediffmat,2);
% east2west(ishft)=east2west(iediff)-east2west(ishft);
east2west=fliplr(east2west);
comparestack(:,:,2)=east2west;
north2south=rot90(cumsum(logiclyr,1),1);
ndiff=diff(north2south,1,2);
indiff=find(ndiff == 0);
[rowdiff,coldiff]=ind2sub(size(ndiff),indiff);
ishft=sub2ind(size(north2south),rowdiff,coldiff+1);
ndiffmat=zeros(size(north2south));
ndiffmat(ishft)=north2south(ishft);
north2south=north2south-cummax(ndiffmat,2);
north2south=rot90(north2south,-1);
comparestack(:,:,3)=north2south;
south2north=rot90(flipud(cumsum(logiclyr(length(logiclyr(:,1)):-1:1,:),1)),-1);
sdiff=diff(south2north,1,2);
isdiff=find(sdiff == 0);
[rowdiff,coldiff]=ind2sub(size(sdiff),isdiff);
ishft=sub2ind(size(south2north),rowdiff,coldiff+1);
sdiffmat=zeros(size(south2north));
sdiffmat(ishft)=south2north(ishft);
south2north=south2north-cummax(sdiffmat,2);
% south2north(ishft)=south2north(ishft)-south2north(isdiff);
south2north=rot90(south2north,1);
comparestack(:,:,4)=south2north;
% filter based on edge check and select minimum distance for each cell
w2e=indmat;
w2e(w_edgechk == 1)=west2east(w_edgechk == 1);
comparestack(:,:,1)=w2e;
e2w=indmat;
e2w(e_edgechk == 1)=east2west(e_edgechk == 1);
comparestack(:,:,2)=e2w;
n2s=indmat;
n2s(n_edgechk == 1)=north2south(n_edgechk == 1);
comparestack(:,:,3)=n2s;
s2n=indmat;
s2n(s_edgechk == 1)=south2north(s_edgechk == 1);
comparestack(:,:,4)=s2n;
coastdist=celldist*min(comparestack,[],3);
% iland=find(Z ~= NoDataVal);
% for i=1:length(iland)
% [row,col]=ind2sub(size(Z),iland(i));
% lats_in=R.LatitudeLimits(2)-row*R.CellExtentInLatitude;
% lons_in=R.LongitudeLimits(1)+col*R.CellExtentInLongitude;
% [dists_min,lats_closest,lons_closest]=dist_from_coast(lats_in,...
% lons_in);
% coastdist(iland(i))=dists_min/1000;
% end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%% Create distance to national border %%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[Z,R]=geotiffread('ca_cntry_250.tif');
cntryid=unique(Z);
NoDataVal=255;
cntryid=cntryid(cntryid ~= NoDataVal);
borderdist=zeros(size(Z));
ndmat=NoDataVal*ones(size(Z));
celldist=0.250; %250 meter resolution dataset
% matrix to minimize
cntrymaxval=max(size(Z));
cntryindmat=(cntrymaxval+1)*ones(size(Z));
for c=1:length(cntryid)
cntrymat=ndmat;
cntrymat(Z == cntryid(c))=cntryid(c);
cntrystck=repmat(zeros(size(Z)),1,1,4);
% edge check
w_edgechk=(cummax(cntrymat,2) == NoDataVal);
e_edgechk=fliplr((cummax(fliplr(cntrymat),2) == NoDataVal));
n_edgechk=(cummax(cntrymat,1) == NoDataVal);
s_edgechk=flipud((cummax(flipud(cntrymat),1) == NoDataVal));
% w_edgechk=repmat((cntrymat(:,1) == NoDataVal),1,length(cntrymat(1,:)));
% e_edgechk=repmat((cntrymat(:,length(cntrymat(1,:))) == ...
% NoDataVal),1,length(cntrymat(1,:)));
% n_edgechk=repmat((cntrymat(1,:) == NoDataVal),length(cntrymat(:,1)),1);
% s_edgechk=repmat((cntrymat(length(cntrymat(:,1)),:) == ...
% NoDataVal),length(cntrymat(:,1)),1);
% calc distance from edges
logiclyr=(cntrymat ~= NoDataVal);
west2east=cumsum(logiclyr,2);
wdiff=diff(west2east,1,2);
iwdiff=find(wdiff == 0);
[rowdiff,coldiff]=ind2sub(size(wdiff),iwdiff);
ishft=sub2ind(size(west2east),rowdiff,coldiff+1);
wdiffmat=zeros(size(west2east));
wdiffmat(ishft)=west2east(ishft);
west2east=west2east-cummax(wdiffmat,2);
% west2east(ishft)=west2east(ishft)-west2east(iwdiff);
cntrystck(:,:,1)=west2east;
east2west=cumsum(fliplr(logiclyr),2);
ediff=diff(east2west,1,2);
iediff=find(ediff == 0);
[rowdiff,coldiff]=ind2sub(size(ediff),iediff);
ishft=sub2ind(size(east2west),rowdiff,coldiff+1);
ediffmat=zeros(size(east2west));
ediffmat(ishft)=east2west(ishft);
east2west=east2west-cummax(ediffmat,2);
% east2west(ishft)=east2west(iediff)-east2west(ishft);
east2west=fliplr(east2west);
cntrystck(:,:,2)=east2west;
north2south=rot90(cumsum(logiclyr,1),1);
ndiff=diff(north2south,1,2);
indiff=find(ndiff == 0);
[rowdiff,coldiff]=ind2sub(size(ndiff),indiff);
ishft=sub2ind(size(north2south),rowdiff,coldiff+1);
ndiffmat=zeros(size(north2south));
ndiffmat(ishft)=north2south(ishft);
north2south=north2south-cummax(ndiffmat,2);
north2south=rot90(north2south,-1);
cntrystck(:,:,3)=north2south;
south2north=rot90(flipud(cumsum(logiclyr(length(logiclyr(:,1)):-1:1,:),1)),-1);
sdiff=diff(south2north,1,2);
isdiff=find(sdiff == 0);
[rowdiff,coldiff]=ind2sub(size(sdiff),isdiff);
ishft=sub2ind(size(south2north),rowdiff,coldiff+1);
sdiffmat=zeros(size(south2north));
sdiffmat(ishft)=south2north(ishft);
south2north=south2north-cummax(sdiffmat,2);
% south2north(ishft)=south2north(ishft)-south2north(isdiff);
south2north=rot90(south2north,1);
cntrystck(:,:,4)=south2north;
% % calc distance from edges
% logiclyr=(cntrymat ~= NoDataVal);
% west2east=cumsum(logiclyr,2);
% east2west=fliplr(cumsum(logiclyr(:,length(logiclyr(1,:)):-1:1),2));
% north2south=cumsum(logiclyr,1);
% south2north=flipud(cumsum(logiclyr(length(logiclyr(:,1)):-1:1,:),1));
%
% filter based on edge check and select minimum distance for each cell
w2e=cntryindmat;
w2e(w_edgechk == 1)=west2east(w_edgechk == 1);
cntrystck(:,:,1)=w2e;
e2w=cntryindmat;
e2w(e_edgechk == 1)=east2west(e_edgechk == 1);
cntrystck(:,:,2)=e2w;
n2s=cntryindmat;
n2s(n_edgechk == 1)=north2south(n_edgechk == 1);
cntrystck(:,:,3)=n2s;
s2n=cntryindmat;
s2n(s_edgechk == 1)=south2north(s_edgechk == 1);
cntrystck(:,:,4)=s2n;
mindist=celldist*min(cntrystck,[],3);
borderdist(Z == cntryid(c))=celldist*mindist(Z == cntryid(c));
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%% Write geotiffs %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
cd X:\CentralAmericaData\Model_inputs
geotiffwrite('coastdist_250.tif',coastdist,Rpop);
geotiffwrite('borderdist_250.tif',borderdist,R);
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