1.0.6: Proj string output

src/helmeltrans.c

@@ -85,7 +85,7 @@ int main(int argc, char* argv[])
         exit(EXIT_FAILURE);
     }
     command = argv[1];
-    if (!strcmp(command,"xyz")) 
+    if (!strcmp(command,"xyz"))
     {
         fprintf(stdout,"B-L-H -> X-Y-Z...\n");
     }
@@ -124,7 +124,7 @@ int main(int argc, char* argv[])
     }
     else
         ofile = stdout;
-    
+
     if(ofile == NULL)
     {
         fprintf(stderr,"Error writing %s\n",ofilename);
@@ -142,9 +142,9 @@ int main(int argc, char* argv[])
     fprintf(stdout,"Ellipsoid %s, a = %lf, b = %lf\n", name, a, b);
     a2 = a * a;
     b2 = b * b;
-    ro = M_PI / 180.0;
-    roi = 180.0 / M_PI;
-    if (!strcmp(command,"xyz")) 
+    ro = DEG2RAD;
+    roi = RAD2DEG;
+    if (!strcmp(command,"xyz"))
     {
         while(fgets( ibuf, 256, ifile)!=NULL)
         {

src/helmert3d.h

@@ -22,9 +22,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
-#define VERS "1.0.5"
+#define VERS "1.0.6"
 #define C_AUTHOR "U. Niethammer"
 #define C_YEAR "2021"
 #define DEBUG 0
+#define DEG2RAD (M_PI / 180.0)
+#define RAD2DEG (180 / M_PI)
+#define RAD2SEC (RAD2DEG * 3600)
 
 #endif // HELMERT3D_H

src/helmparms3d.c

@@ -288,6 +288,7 @@ int main(int argc, char* argv[])
     double **R_mat=NULL;
     double trace1=0.0, trace2=0.0;
     double scal=0.0, ppm=0.0;
+    double rx=0.0, ry=0.0, rz=0.0;
     FILE *outfile;
 
     fprintf(stdout,"\n*******************************\n");
@@ -514,7 +515,7 @@ int main(int argc, char* argv[])
         fprintf(stderr,"Error writing %s\n",out_param_name);
         exit(EXIT_FAILURE);
     }
-    
+
     matrix_init(n, m, src_mat_T);
     matrix_transpose(n, n, R_mat, src_mat_T);
     fprintf(stdout,"R =\n");
@@ -529,6 +530,12 @@ int main(int argc, char* argv[])
 
     fprintf(stdout,"s = %10.10lf (= %10.10lf ppm)\n\n",scal, ppm);
 
+    rx = 0.5 * (src_mat_T[2][1] - src_mat_T[1][2]) * RAD2SEC;
+    ry = 0.5 * (src_mat_T[0][2] - src_mat_T[2][0]) * RAD2SEC;
+    rz = 0.5 * (src_mat_T[1][0] - src_mat_T[0][1]) * RAD2SEC;
+    fprintf(stdout,"Proj string:\n");
+    fprintf(stdout,"+towgs84=%.3f,%.3f,%.3f,%.3f,%.3f,%.3f,%.3f\n\n", T_vec[0], T_vec[1], T_vec[2], rx, ry, rz, ppm);
+
     if(argc < 4)
     {
         fprintf(stdout,"Results matrix:\n");