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SetRegion.cpp
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SetRegion.cpp
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/* Set Region function to set grid cell values for a grid processing region as part of RWD.
David Tarboton
Utah State University
Jan 15, 2017
This function takes as input a file defining regions (gwfile) and a flow direction grid
The output is a new region grid that adds downstream grid cells with flow direction nodata that the region drains into.
The logic is
if gwData is nodata
if pData is notata
if neighbor drains to cell set region to region of neighbor
else
use existing gwdata
*/
/* Copyright (C) 2017 David Tarboton, Utah State University
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2, 1991 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
A copy of the full GNU General Public License is included in file
gpl.html. This is also available at:
http://www.gnu.org/copyleft/gpl.html
or from:
The Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
If you wish to use or incorporate this program (or parts of it) into
other software that does not meet the GNU General Public License
conditions contact the author to request permission.
David G. Tarboton
Utah State University
8200 Old Main Hill
Logan, UT 84322-8200
USA
http://www.engineering.usu.edu/dtarb/
email: dtarb@usu.edu
*/
// This software is distributed from http://hydrology.usu.edu/taudem/
#include <mpi.h>
#include <math.h>
#include "commonLib.h"
#include "linearpart.h"
#include "createpart.h"
#include "tiffIO.h"
#include <stack>
using namespace std;
/*********************************************************************/
int readline(FILE *fp, char *fline)
{
int i = 0, ch;
for (i = 0; i< MAXLN; i++)
{
ch = getc(fp);
if (ch == EOF) { *(fline + i) = '\0'; return(EOF); }
else *(fline + i) = (char)ch;
if ((char)ch == '\n') { *(fline + i) = '\0'; return(0); }
}
return(1);
}
int setregion(char *fdrfile, char *regiongwfile, char *newfile, int32_t regionID)
{
MPI_Init(NULL,NULL);{
//Only used for timing
int rank,size;
MPI_Comm_rank(MCW,&rank);
MPI_Comm_size(MCW,&size);
if(rank==0)printf("SetRegion version %s\n",TDVERSION);
double begin,end;
//Begin timer
begin = MPI_Wtime();
//Create tiff object, read and store header info
tiffIO fdrIO(fdrfile , SHORT_TYPE);
long totalX = fdrIO.getTotalX();
long totalY = fdrIO.getTotalY();
double dxA = fdrIO.getdxA();
double dyA = fdrIO.getdyA();
if(rank==0)
{
float timeestimate=(1e-7*totalX*totalY/pow((double) size,1))/60+1; // Time estimate in minutes
//fprintf(stderr,"This run may take on the order of %.0f minutes to complete.\n",timeestimate);
fprintf(stderr,"Time estimate not available.\n");
fflush(stderr);
}
//Create partition and read fdr data
tdpartition *pData;
pData = CreateNewPartition(fdrIO.getDatatype(), totalX, totalY, dxA, dyA, fdrIO.getNodata());
int nx = pData->getnx();
int ny = pData->getny();
int xstart, ystart;
pData->localToGlobal(0, 0, xstart, ystart);
fdrIO.read(xstart, ystart, ny, nx, pData->getGridPointer());
//Create partition and read gw data
tdpartition *gwData;
tiffIO gwIO(regiongwfile, LONG_TYPE);
if (!fdrIO.compareTiff(gwIO)) {
printf("File sizes do not match\n%s\n", regiongwfile);
fflush(stdout);
MPI_Abort(MCW, 5);
return 1;
}
gwData = CreateNewPartition(gwIO.getDatatype(), totalX, totalY, dxA, dyA, gwIO.getNodata());
gwIO.read(xstart, ystart, ny, nx, gwData->getGridPointer());
//Create empty partition to store new information
tdpartition *newvals;
newvals = CreateNewPartition(LONG_TYPE, totalX, totalY, dxA, dyA, MISSINGLONG);
//Share information across partitions
gwData->share();
pData->share();
// replicate
for (long j = 0; j < ny; j++) {
for (long i = 0; i < nx; i++) {
newvals->setToNodata(i, j);
if (gwData->isNodata(i, j)) {
if (pData->isNodata(i, j)) {
// Check neighbors
for (int k = 1; k <= 8; k++) {
long in = i + d1[k];
long jn = j + d2[k];
if (pData->hasAccess(in, jn) && !pData->isNodata(in, jn)) {
short dirnb;
pData->getData(in, jn, dirnb);
if (dirnb > 0 && abs(dirnb - k) == 4) { // The neighbor drains to the cell so it is in the region
newvals->setData(i, j, regionID);
break;
}
}
}
}
else
newvals->setData(i, j, regionID);
}
else {
newvals->setData(i, j,regionID);
}
}
}
//Create and write TIFF file
long aNodata = MISSINGLONG;
tiffIO newIO(newfile, LONG_TYPE, aNodata, gwIO);
newIO.write(xstart, ystart, ny, nx, newvals->getGridPointer());
//Stop timer
end = MPI_Wtime();
double compute, temp;
compute = end - begin;
MPI_Allreduce(&compute, &temp, 1, MPI_DOUBLE, MPI_SUM, MCW);
compute = temp / size;
if (rank == 0)
printf("Compute time: %f\n", compute);
//Brackets force MPI-dependent objects to go out of scope before Finalize is called
}MPI_Finalize();
return 0;
}