...

mcc/mcc_utils.h

@@ -244,6 +244,10 @@ static R rad2sxg(double ang, bool hms = false, int prec = 2)
         term *= 10.0;
     }
 
+    // round to given precision of arcseconds/seconds
+    degs = std::round(degs * 3600.0 * term) / term / 3600.0;
+
+
     auto d = std::trunc(degs);
     auto s = (degs - d) * 60.0;
     auto m = std::trunc(s);
@@ -261,7 +265,9 @@ static R rad2sxg(double ang, bool hms = false, int prec = 2)
     }
 
     if (ang < 0) {
-        std::ranges::copy(std::string_view("-"), std::back_inserter(res));
+        if (!isEqual(d, 0.0) || !isEqual(m, 0.0) || !isEqual(s, 0.0)) {
+            std::ranges::copy(std::string_view("-"), std::back_inserter(res));
+        }
     }
 
     std::vformat_to(std::back_inserter(res), std::string_view{fmt.begin(), fmt.end()}, std::make_format_args(d, m, s));