diff --git a/include/mapnik/json/feature_grammar.hpp b/include/mapnik/json/feature_grammar.hpp
index 10a295fda..163552427 100644
--- a/include/mapnik/json/feature_grammar.hpp
+++ b/include/mapnik/json/feature_grammar.hpp
@@ -97,7 +97,7 @@ struct error_handler
         Iterator first, Iterator last,
         Iterator err_pos, boost::spirit::info const& what) const
     {
-        MAPNIK_LOG_WARN(error_handler) << what << " expected in input";
+        MAPNIK_LOG_ERROR(error_handler) << what << " expected but got: " << where_message()(err_pos, last, 16);
     }
 };
 
diff --git a/include/mapnik/json/feature_grammar_impl.hpp b/include/mapnik/json/feature_grammar_impl.hpp
index 5ae816cea..0d93ad10a 100644
--- a/include/mapnik/json/feature_grammar_impl.hpp
+++ b/include/mapnik/json/feature_grammar_impl.hpp
@@ -114,8 +114,10 @@ feature_grammar<Iterator,FeatureType,ErrorHandler>::feature_grammar(mapnik::tran
     attribute_value %= json_.number | json_.string_  ;
 
     feature.name("Feature");
+    feature_type.name("Feature Type");
     properties.name("Properties");
     attributes.name("Attributes");
+    attribute_value.name("Attribute Value");
 
     on_error<fail>(feature, error_handler(_1, _2, _3, _4));