diff --git a/simgear/misc/strutils.cxx b/simgear/misc/strutils.cxx
index cb51fff7..8c0ff464 100644
--- a/simgear/misc/strutils.cxx
+++ b/simgear/misc/strutils.cxx
@@ -1140,9 +1140,9 @@ bool parseStringAsLatLonValue(const std::string& s, double& degrees)
     auto spacePos = ss.find_first_of(" *");
     
     if (spacePos == std::string::npos) {
-        degrees = std::stof(ss);
+        degrees = std::stod(ss);
     } else {
-        degrees = std::stof(ss.substr(0, spacePos));
+        degrees = std::stod(ss.substr(0, spacePos));
         
         double minutes = 0.0, seconds = 0.0;
         
@@ -1151,13 +1151,13 @@ bool parseStringAsLatLonValue(const std::string& s, double& degrees)
         if (quotePos == std::string::npos) {
             const auto minutesStr = ss.substr(spacePos+1);
             if (!minutesStr.empty()) {
-                minutes = std::stof(minutesStr);
+                minutes = std::stod(minutesStr);
             }
         } else {
-            minutes = std::stof(ss.substr(spacePos+1, quotePos - spacePos));
+            minutes = std::stod(ss.substr(spacePos+1, quotePos - spacePos));
             const auto secondsStr = ss.substr(quotePos+1);
             if (!secondsStr.empty()) {
-                seconds = std::stof(secondsStr);
+                seconds = std::stod(secondsStr);
             }
         }
         
@@ -1171,7 +1171,7 @@ bool parseStringAsLatLonValue(const std::string& s, double& degrees)
     }
     
     // since we simplified, any trailing N/S/E/W must be the last char
-    const char lastChar = ss.back();
+    const char lastChar = ::toupper(ss.back());
     if ((lastChar == 'W') || (lastChar == 'S')) {
         degrees = -degrees;
     }
diff --git a/simgear/misc/strutils_test.cxx b/simgear/misc/strutils_test.cxx
index 00fef42c..e321f13b 100644
--- a/simgear/misc/strutils_test.cxx
+++ b/simgear/misc/strutils_test.cxx
@@ -625,27 +625,32 @@ void test_parseGeod()
     SGGeod a;
     SG_VERIFY(strutils::parseStringAsGeod("56.12,-3.0", &a));
     SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -3.0);
-    SG_CHECK_EQUAL_EP2(a.getLatitudeDeg(), 56.12, 1e-4);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), 56.12);
+    
+    SG_VERIFY(strutils::parseStringAsGeod("56.12345678s,3.12345678w", &a));
+    SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -3.12345678);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), -56.12345678);
+    
     
     // trailing degrees
     SG_VERIFY(strutils::parseStringAsGeod("56.12*,-3.0*", &a));
     SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -3.0);
-    SG_CHECK_EQUAL_EP2(a.getLatitudeDeg(), 56.12, 1e-4);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), 56.12);
     
     // embedded whitepace, DMS notation, NSEW notation
     SG_VERIFY(strutils::parseStringAsGeod("\t40 30'50\"S,  12 34'56\"W ", &a));
-    SG_CHECK_EQUAL_EP2(a.getLongitudeDeg(), -12.58222222, 1e-4);
-    SG_CHECK_EQUAL_EP2(a.getLatitudeDeg(), -40.5138888, 1e-4);
-
+    SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -12.58222222);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), -40.5138888);
+    
     // embedded whitepace, DMS notation, NSEW notation, degrees symbol
     SG_VERIFY(strutils::parseStringAsGeod("\t40*30'50\"S,  12*34'56\"W ", &a));
-    SG_CHECK_EQUAL_EP2(a.getLongitudeDeg(), -12.58222222, 1e-4);
-    SG_CHECK_EQUAL_EP2(a.getLatitudeDeg(), -40.5138888, 1e-4);
+    SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -12.58222222);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), -40.5138888);
     
     // signed degrees-minutes
     SG_VERIFY(strutils::parseStringAsGeod("-45 27.89,-12 34.56", &a));
-    SG_CHECK_EQUAL_EP2(a.getLongitudeDeg(), -12.576, 1e-4);
-    SG_CHECK_EQUAL_EP2(a.getLatitudeDeg(), -45.464833, 1e-4);
+    SG_CHECK_EQUAL_EP(a.getLongitudeDeg(), -12.576);
+    SG_CHECK_EQUAL_EP(a.getLatitudeDeg(), -45.464833333);
     
     SG_VERIFY(strutils::parseStringAsGeod("") == false);
     SG_VERIFY(strutils::parseStringAsGeod("aaaaaaaa") == false);