[Backport 9.3] cs2cs: fix handling of input coordinates in grad (fixes #3800)

src/apps/cs2cs.cpp

@@ -171,7 +171,7 @@ static void process(FILE *fid)
 
         if (data.u != HUGE_VAL) {
 
-            if (srcIsLongLat) {
+            if (srcIsLongLat && fabs(srcToRadians - M_PI / 180) < 1e-10) {
                 /* dmstor gives values to radians. Convert now to the SRS unit
                  */
                 data.u /= srcToRadians;
@@ -922,10 +922,10 @@ int main(int argc, char **argv) {
     }
 
     /* set input formatting control */
-    if (!srcIsLongLat)
-        informat = strtod;
-    else {
+    if (srcIsLongLat && fabs(srcToRadians - M_PI / 180) < 1e-10)
         informat = dmstor;
+    else {
+        informat = strtod;
     }
 
     if (!destIsLongLat && !oform)

test/CMakeLists.txt

@@ -72,7 +72,7 @@ proj_add_gie_test("GIGS-5101.4-jhs-etmerc" "gigs/5101.4-jhs-etmerc.gie")
 # Same as above, but using etmerc instead of tmerc
 #proj_add_gie_test("GIGS-5101.4-jhs" "gigs/5101.4-jhs.gie")
 proj_add_gie_test("GIGS-5102.1" "gigs/5102.1.gie")
-#proj_add_gie_test("GIGS-5102.2" "gigs/5102.2.gie")
+proj_add_gie_test("GIGS-5102.2" "gigs/5102.2.gie")
 proj_add_gie_test("GIGS-5103.1" "gigs/5103.1.gie")
 proj_add_gie_test("GIGS-5103.2" "gigs/5103.2.gie")
 proj_add_gie_test("GIGS-5103.3" "gigs/5103.3.gie")

test/cli/testvarious

@@ -120,6 +120,12 @@ $EXE +proj=utm +zone=11 +datum=WGS84 +pm=3 \
 500000 3000000
 EOF
 echo "##############################################################" >> ${OUT}
+echo Test input in grad >> ${OUT}
+#
+$EXE EPSG:4807 EPSG:27572 -E >>${OUT} <<EOF
+64.44444444 2.9586342556
+EOF
+echo "##############################################################" >> ${OUT}
 echo Test geocentric x/y/z generation. >> ${OUT}
 #
 $EXE +proj=latlong +datum=WGS84  \

test/cli/tv_out.dist

@@ -31,6 +31,9 @@ Test support for the lon_wrap switch.
 Test simple prime meridian handling within a projection.
 500000 3000000	113dW	27d7'20.891"N 0.000
 ##############################################################
+Test input in grad
+64.44444444 2.9586342556	760724.02	3457334.86 0.00
+##############################################################
 Test geocentric x/y/z generation.
 0d00'00.001"W 0d00'00.001"N 0.0	6378137.00	-0.03 0.03
 0d00'00.001"W 0d00'00.001"N 10.0	6378147.00	-0.03 0.03

test/gigs/5102.2.gie.failing → test/gigs/5102.2.gie

@@ -1,14 +1,20 @@
 --------------------------------------------------------------------------------
 
 Test 5102 (part 2), Lambert Conic Conformal (1SP), v2-0_2011-06-28.
-
 --------------------------------------------------------------------------------
 
-<gie>
+<gie-strict>
+
+use_proj4_init_rules true
 
 --------------------------------------------------------------------------------
-operation  +proj=pipeline
-           +step +init=epsg:4807 +inv
+# We need to add this grad->rad step as +init=epsg:4807 assumes
+# degrees (if front operation), or radians (if non-front), as this was the case
+# in PROJ < 6 era
+# Note: "cs2cs EPSG:4807 EPSG:27572" does the right job.
+operation  +proj=pipeline \
+           +step +proj=unitconvert +xy_in=grad +xy_out=rad \
+           +step +init=epsg:4807 +inv \
            +step +init=epsg:27572
 --------------------------------------------------------------------------------
 tolerance  0.03 m
@@ -88,9 +94,13 @@ accept    9.6253009222 58.8888888889
 expect    1183926.705 2923124.876
 
 --------------------------------------------------------------------------------
-operation  +proj=pipeline
-           +step +init=epsg:27572 +inv
-           +step +init=epsg:4807
+# We need to add this rad->grad step as +init=epsg:4807 assumes
+# degrees (if last operation), or radians (if non-last), as this was the case
+# in PROJ < 6 era
+operation  +proj=pipeline \
+           +step +init=epsg:27572 +inv \
+           +step +init=epsg:4807 \
+           +step +proj=unitconvert +xy_in=rad +xy_out=grad
 --------------------------------------------------------------------------------
 tolerance  0.03 m
 accept    760724.023 3457334.864
@@ -169,8 +179,12 @@ accept    1183926.705 2923124.876
 expect    9.6253009222 58.8888888889
 
 --------------------------------------------------------------------------------
-operation  +proj=pipeline
-           +step +init=epsg:4807 +inv
+# We need to add this grad->rad step as +init=epsg:4807 assumes
+# degrees (if front operation), or radians (if non-front), as this was the case
+# in PROJ < 6 era
+operation  +proj=pipeline \
+           +step +proj=unitconvert +xy_in=grad +xy_out=rad \
+           +step +init=epsg:4807 +inv \
            +step +init=epsg:27572
 --------------------------------------------------------------------------------
 tolerance  0.006 m
@@ -249,4 +263,4 @@ tolerance  0.006 m
 accept    9.6253009222 58.8888888889
 roundtrip 1000
 
-</gie>
+</gie-strict>