/* ** $Id: cn07c.c,v 1.5 1997/10/08 17:21:49 haley Exp $ */ /*********************************************************************** * * * Copyright (C) 1995 * * University Corporation for Atmospheric Research * * The use of this Software is governed by a License Agreement * * * ***********************************************************************/ /* ** File: cn07c.c ** ** Author: Ethan Alpert (converted to C by Mary Haley) ** National Center for Atmospheric Research ** PO 3000, Boulder, Colorado ** ** Date: Fri Oct 6 09:21:57 MDT 1995 ** ** Description: Reads a netCDF file and produces a series of ** contour plots. ** */ #include #include #include #include #include #include #include #include #include #include #include #define NCOLORS 17 int xbvalues[] = {-60,-75,-90,-105,-120,-135}; int ylvalues[] = {60,50,40,30,20}; char *xblabels[] = {"60W","75W","90W","105W","120W","135W"}; char *yllabels[] = {"60N","50N","40N","30N","20N"}; main() { /* * Declare variables for the HLU routine calls. */ int appid, workid, field1, con1; int srlist, i; int icount[2]; float cmap[NCOLORS][3]; /* * Declare variables for getting information from netCDF file. */ int ncid, lon_id, lat_id, frtime_id, Z_id; float Z[33][36], special_value; float lon[36], lat[33]; long start[4], count[4], lonlen, latlen, frtimelen; long frtime[7]; char filename[256]; const char *dir = _NGGetNCARGEnv("data"); /* * Default is to create an NCGM file. */ int NCGM=1, X11=0, PS=0; /* * Initialize the HLU library and set up resource template. */ NhlInitialize(); srlist = NhlRLCreate(NhlSETRL); /* * Create Application object. */ NhlRLClear(srlist); NhlRLSetString(srlist,NhlNappDefaultParent,"True"); NhlRLSetString(srlist,NhlNappUsrDir,"./"); NhlCreate(&appid,"cn07",NhlappClass,NhlDEFAULT_APP,srlist); cmap[0][0] = 0.0; cmap[0][1] = 0.0; cmap[0][2] = 0.0; cmap[1][0] = 1.0; cmap[1][1] = 1.0; cmap[1][2] = 1.0; cmap[2][0] = 0.0; cmap[2][1] = 0.0; cmap[2][2] = 0.0; cmap[3][0] = 1.0; cmap[3][1] = 0.0; cmap[3][2] = 0.0; cmap[4][0] = 0.0; cmap[4][1] = 1.0; cmap[4][2] = 0.0; cmap[5][0] = 0.0; cmap[5][1] = 0.0; cmap[5][2] = 1.0; cmap[6][0] = 1.0; cmap[6][1] = 1.0; cmap[6][2] = 0.0; cmap[7][0] = 0.0; cmap[7][1] = 1.0; cmap[7][2] = 1.0; cmap[8][0] = 1.0; cmap[8][1] = 0.0; cmap[8][2] = 1.0; cmap[9][0] = 0.5; cmap[9][1] = 0.0; cmap[9][2] = 0.0; cmap[10][0] = 0.5; cmap[10][1] = 1.0; cmap[10][2] = 1.0; cmap[11][0] = 0.0; cmap[11][1] = 0.0; cmap[11][2] = 0.5; cmap[12][0] = 1.0; cmap[12][1] = 1.0; cmap[12][2] = 0.5; cmap[13][0] = 0.5; cmap[13][1] = 0.0; cmap[13][2] = 1.0; cmap[14][0] = 1.0; cmap[14][1] = 0.5; cmap[14][2] = 0.0; cmap[15][0] = 0.0; cmap[15][1] = 0.5; cmap[15][2] = 1.0; cmap[16][0] = 0.5; cmap[16][1] = 1.0; cmap[16][2] = 0.0; icount[0] = NCOLORS; icount[1] = 3; if (NCGM) { /* * Create a meta file object. */ NhlRLClear(srlist); NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,icount); NhlRLSetString(srlist,NhlNwkMetaName,"./cn07c.ncgm"); NhlCreate(&workid,"cn07Work",NhlncgmWorkstationClass, NhlDEFAULT_APP,srlist); } else if (X11) { /* * Create an XWorkstation object. */ NhlRLClear(srlist); NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,icount); NhlRLSetInteger(srlist,NhlNwkPause,True); NhlCreate(&workid,"cn07Work",NhlxWorkstationClass, NhlDEFAULT_APP,srlist); } else if (PS) { /* * Create a PS workstation. */ NhlRLClear(srlist); NhlRLSetMDFloatArray(srlist,NhlNwkColorMap,&cmap[0][0],2,icount); NhlRLSetString(srlist,NhlNwkPSFileName,"./cn07c.ps"); NhlCreate(&workid,"cn07Work",NhlpsWorkstationClass, NhlDEFAULT_APP,srlist); } /* * Open NetCDF file containing Geo-Potential height forecast * information. */ sprintf( filename, "%s/cdf/contour.cdf", dir ); ncid = ncopen(filename,NC_NOWRITE); /* * Get the lat/lon dimensions. */ lat_id = ncdimid(ncid,"lat"); lon_id = ncdimid(ncid,"lon"); frtime_id = ncdimid(ncid,"frtime"); ncdiminq(ncid,lat_id,(char *)0,&latlen); ncdiminq(ncid,lon_id,(char *)0,&lonlen); ncdiminq(ncid,frtime_id,(char *)0,&frtimelen); /* * Read in Z. */ Z_id = ncvarid(ncid,"Z"); start[0] = start[2] = start[3] = 0; start[1] = 3; count[0] = count[1] = 1; count[2] = latlen; count[3] = lonlen; ncvarget(ncid,Z_id,(long const *)start,(long const *)count,Z); ncattget(ncid,Z_id,"_FillValue",&special_value); /* * Read in lat/lon/frtime values. */ lat_id = ncvarid(ncid,"lat"); count[0] = latlen; ncvarget(ncid,lat_id,(long const *)start,(long const *)count,lat); lon_id = ncvarid(ncid,"lon"); count[0] = lonlen; ncvarget(ncid,lon_id,(long const *)start,(long const *)count,lon); frtime_id = ncvarid(ncid,"frtime"); count[0] = frtimelen; ncvarget(ncid,frtime_id,(long const *)start,(long const *)count,frtime); /* * Create a scalar field object and configure the missing values and * the start and end information. */ icount[0] = latlen; icount[1] = lonlen; NhlRLClear(srlist); NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&Z[0][0],2,(int *)icount); NhlRLSetFloat(srlist,NhlNsfMissingValueV,special_value); NhlRLSetFloat(srlist,NhlNsfXCStartV,lon[0]); NhlRLSetFloat(srlist,NhlNsfXCEndV,lon[lonlen-1]); NhlRLSetFloat(srlist,NhlNsfYCStartV,lat[0]); NhlRLSetFloat(srlist,NhlNsfYCEndV,lat[latlen-1]); NhlCreate(&field1,"field1",NhlscalarFieldClass,appid,srlist); /* * Create contour object. */ NhlRLClear(srlist); NhlRLSetFloat(srlist,NhlNvpXF,.2); NhlRLSetFloat(srlist,NhlNvpYF,.8); NhlRLSetFloat(srlist,NhlNvpWidthF,.6); NhlRLSetFloat(srlist,NhlNvpHeightF,.6); NhlRLSetInteger(srlist,NhlNcnScalarFieldData,field1); NhlRLSetString(srlist,NhlNcnLevelSelectionMode,"ManualLevels"); NhlRLSetFloat(srlist,NhlNcnMinLevelValF,5400.0); NhlRLSetFloat(srlist,NhlNcnMaxLevelValF,5950.0); NhlRLSetFloat(srlist,NhlNcnLevelSpacingF,50.0); NhlRLSetString(srlist,NhlNcnFillOn,"True"); NhlRLSetString(srlist,NhlNcnLowLabelsOn,"True"); NhlRLSetString(srlist,NhlNcnHighLabelsOn,"True"); NhlRLSetFloat(srlist,NhlNtrXMinF,-140.0); NhlRLSetFloat(srlist,NhlNtrXMaxF,-52.5); NhlRLSetFloat(srlist,NhlNtrYMinF,20.0); NhlRLSetFloat(srlist,NhlNtrYMaxF,60.0); NhlRLSetString(srlist,NhlNtiMainString,"Geo-potential height @500mb"); NhlRLSetString(srlist,NhlNtiXAxisString,"Lon"); NhlRLSetString(srlist,NhlNtiYAxisString,"Lat"); NhlRLSetString(srlist,NhlNtmXBMode,"EXPLICIT"); NhlRLSetIntegerArray(srlist,NhlNtmXBValues,xbvalues,NhlNumber(xbvalues)); NhlRLSetStringArray(srlist,NhlNtmXBLabels,xblabels,NhlNumber(xblabels)); NhlRLSetString(srlist,NhlNtmYLMode,"EXPLICIT"); NhlRLSetIntegerArray(srlist,NhlNtmYLValues,ylvalues,NhlNumber(ylvalues)); NhlRLSetStringArray(srlist,NhlNtmYLLabels,yllabels,NhlNumber(yllabels)); NhlRLSetString(srlist,NhlNtmXMajorGrid,"True"); NhlRLSetString(srlist,NhlNtmYMajorGrid,"True"); NhlRLSetString(srlist,NhlNtmXBMinorOn,"False"); NhlRLSetString(srlist,NhlNtmYLMinorOn,"False"); NhlCreate(&con1,"con1",NhlcontourPlotClass,workid,srlist); /* * Draw first frame */ NhlDraw(con1); NhlFrame(workid); /* * Loop on remaining time steps. */ for( i = 1; i <= frtimelen-1; i++ ) { /* * Read in new section of Z. */ start[0] = i; start[1] = 3; start[2] = 0; start[3] = 0; count[0] = 1; count[1] = 1; count[2] = latlen; count[3] = lonlen; ncvarget(ncid,Z_id,(long const *)start,(long const *)count,Z); /* * Create new scalar field. */ NhlRLClear(srlist); icount[0] = latlen; icount[1] = lonlen; NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&Z[0][0],2, (int *)icount); NhlSetValues(field1,srlist); NhlDraw(con1); NhlFrame(workid); } /* * Close the netCDF file. */ ncclose(ncid); /* * NhlDestroy destroys the given id and all of its children. */ NhlRLDestroy(srlist); NhlDestroy(appid); /* * Restores state. */ NhlClose(); exit(0); }