############################

####  Extract MOD35 C6 processing path

setwd("~/acrobates/adamw/projects/interp/data/modis/mod35")

library(multicore)

library(raster)

library(spgrass6)

url="ftp://ladsweb.nascom.nasa.gov/allData/51/MOD35_L2/2012/"

dir.create("swath")

system(paste("wget -S --recursive --no-parent --no-directories -N -P swath --accept \"hdf\" --accept \"002|003|004\" ",url))

### make global raster that aligns with MODLAND tiles

## get MODLAND tile to serve as base

#system("wget http://e4ftl01.cr.usgs.gov/MOLT/MOD13A3.005/2000.02.01/MOD13A3.A2000032.h00v08.005.2006271174446.hdf")

#t=raster(paste("HDF4_EOS:EOS_GRID:\"",getwd(),"/MOD13A3.A2000032.h00v08.005.2006271174446.hdf\":MOD_Grid_monthly_1km_VI:1 km monthly NDVI",sep=""))

projection(t)

## make global extent

pmodis="+proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181 +b=6371007.181 +units=m +no_defs"

glb=t

#glb=raster(glb,crs="+proj=longlat +datum=WGS84",nrows=42500,ncols=85000)

#extent(glb)=alignExtent(projectRaster(glb,crs=projection(t),over=T),t)

#res(glb)=c(926.6254,926.6264)

#projection(glb)=pmodis

## confirm extent

#projectExtent(glb,crs="+proj=longlat +datum=WGS84")

#### Grid and mosaic the swath data

stitch="/usr/local/heg/2.12/bin/swtif"

## vars to process

vars=as.data.frame(matrix(c(

#  "Sensor_Azimuth",       "ZA",   "CUBIC", 1,

  "Sensor_Zenith",        "SZ",   "CUBIC", 1),

  byrow=T,ncol=4,dimnames=list(1:2,c("variable","varid","method","band"))),stringsAsFactors=F)

## global bounding box

   proj4string(gpp)=projection(glb)

  outfile=paste(tempdir(),"/",var$varid,"_",basename(file),sep="")  #gridded path

INPUT_FILENAME=",file,"

OBJECT_NAME=mod35

BAND_NUMBER = ",var$band,"

OUTPUT_PIXEL_SIZE_Y=0.008333333

SPATIAL_SUBSET_LR_CORNER = ( ",bbox(gpp)[2,1]," ",bbox(gpp)[1,2]," )

RESAMPLING_TYPE =",var$method,"

OUTPUT_PROJECTION_PARAMETERS = ( 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 )

# OUTPUT_PROJECTION_PARAMETERS = ( 6371007.181 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 )

# projection parameters from http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/newPage.cgi?fileName=sn_gctp

ELLIPSOID_CODE = WGS84

OUTPUT_TYPE = HDFEOS

",sep="")

   cat( c(hdr,grp)   , file=paste(tempdir(),"/",basename(file),"_MODparms.txt",sep=""))

   ## now run the swath2grid tool

   ## write the gridded file

   print(paste("Starting",file))

   print(paste("Finished processing variable",var$variable,"from ",basename(file),"to",outfile))

}  

   setwd(tempdir())

   bfile=sub(".hdf","",basename(file))

   tempfile2_path=paste(tempdir(),"/",bfile,".tif",sep="")  #gridded/masked/processed path

   outfile=paste(outdir,"/",bfile,".tif",sep="")  #final file

   if(file.exists(outfile)) return(c(file,0))

   ppc=gpp

#######

## run swtif for each band

   lapply(1:nrow(vars),function(i) swtif(file,vars[i,]))

   if(!file.exists(paste(tempdir(),"/CM_",basename(file),sep=""))) {

     return(c(file,0))

   }

   ## convert to land path

   sz=raster(paste(tempdir(),"/SZ_",basename(file),sep=""))

   NAvalue(sz)=-9999

   getlc=function(x,y) {ifelse(y==0|y>6000,NA,((x%/%2^6) %% 2^2))}

### warp them to align all pixels

   system(paste("gdalwarp -overwrite -srcnodata 255 -dstnodata 255 -tap -tr 0.008333333 0.008333333 -co COMPRESS=LZW -co ZLEVEL=9 -co PREDICTOR=2 -s_srs \"",projection(t),"\" ",tempfile2_path," ",outfile,sep=""))

   ## delete temporary files

   file.remove(list.files(tempdir(),pattern=bfile,full=T))

   return(c(file,1))

 }

## check gdal can read all of them

check=do.call(rbind,mclapply(gfiles,function(file){

    gd=system(paste("gdalinfo ",file,sep=""),intern=T)

    if(any(grepl("Corner",gd))) return(1)

    else return(0)

}))

table(check)

file.remove(gfiles[check==0])

  ## global

#bb="-ulx -180 -uly 90 -lrx 170 -lry 80"

bb="-ulx -72 -uly 11 -lrx -59 -lry -1"

#expand.grid(x=seq(-180,170,by=10),y=seq(-90,80))

system(paste("pkmosaic ",bb," -co COMPRESS=LZW -co PREDICTOR=2 ",paste("-i",gf2,collapse=" ")," -o h11v08_path_pkmosaic.tif -ot Byte -m 7 -v -t 255"))

                                        #  bounding box?  

###########

### Use GRASS to import all the tifs and calculat the mode

## make temporary working directory

  tf=paste(tempdir(),"/grass", Sys.getpid(),"/", sep="")  #temporar

  if(!file.exists(tf)) dir.create(tf)

  ## set up temporary grass instance for this PID

  gisBase="/usr/lib/grass64"

  print(paste("Set up temporary grass session in",tf))

  initGRASS(gisBase=gisBase,gisDbase=tf,SG=as(glb,"SpatialGridDataFrame"),override=T,location="mod35",mapset="PERMANENT",home=tf,pid=Sys.getpid())

  system(paste("g.proj -c proj4=\"",projection(glb),"\"",sep=""),ignore.stdout=T,ignore.stderr=T)

## read in NPP grid to serve as grid

  execGRASS("r.in.gdal",input=t@file@name,output="grid")

  system("g.region rast=grid n=90 s=-90 save=roi --overwrite",ignore.stdout=F,ignore.stderr=F)

## get files already imported - only important if more tifs were written after an initial import

imported=basename(gfiles)%in%system("g.mlist type=rast pattern=MOD*",intern=T)

table(imported)

## read in all tifs

  for(f in gfiles[!imported])  execGRASS("r.in.gdal",input=f,output=basename(f),flags="o")

## calculate mode

execGRASS("r.series",input=paste(system("g.mlist type=rast pattern=MOD*",intern=T)[1:1000],sep="",collapse=","),output="MOD35_path",method="mode",range=c(1,5),flags=c("verbose","overwrite"))

## add colors

execGRASS("r.colors",map="MOD35_path",rules="MOD35_path_grasscolors.txt")

## write to disk

execGRASS("r.out.gdal",input="MOD35_path",output=paste(getwd(),"/MOD35_ProcessPath_C5.tif",sep=""),type="Byte",createopt="COMPRESS=LZW,LEVEL=9,PREDICTOR=2")

### delete the temporary files 

  unlink_.gislock()

  system(paste("rm -frR ",tf,sep=""))

#########################

cols=c("blue","lightblue","tan","green")

## connect to raster to extract land-cover bit

library(raster)

d=raster("CM.tif")

getlc=function(x) {(x/2^6) %% 2^2}

calc(d,fun=getlc,filename="CM_LC.tif")