diff --git a/src/ParamOutputImpl/Plot/PanelPlotOutput.cc b/src/ParamOutputImpl/Plot/PanelPlotOutput.cc
index bf226bc..3487e3d 100644
--- a/src/ParamOutputImpl/Plot/PanelPlotOutput.cc
+++ b/src/ParamOutputImpl/Plot/PanelPlotOutput.cc
@@ -2111,34 +2111,46 @@ void PanelPlotOutput::writeContext(ContextFileWriter &writer, AMDA::Parameters::
 					inputTTOrCat.read(ttOrCatPath, lReaderType);
 					for (std::vector<TimeTableCatalog::TimeInterval>::const_iterator it = inputTTOrCat.getIntervals().begin(); it != inputTTOrCat.getIntervals().end(); ++it)
 					{
+						double acceptedRatio = 0.005; // if the interval is too small, no more info given
+						double timeRatio = (currentTimeInterval->_stopTime - currentTimeInterval->_startTime) / _plotAreaBounds._width;
+
 						std::map<std::string, std::vector<std::string>> data;
 						bool needTTWriter = false;
 						bool needCatWriter = false;
-						std::string startTime = std::to_string(it->_startTime);
-						std::string stopTime = std::to_string(it->_stopTime);
+						double startTime = it->_startTime;
+						double stopTime = it->_stopTime;
 
 						if (it->_startTime >= currentTimeInterval->_startTime && it->_stopTime <= currentTimeInterval->_stopTime) // inside the interval
 						{
-							needTTWriter = true;
-							data = it->getAllParameterData();
-							if (data.size() > 0)
-								needCatWriter = true;
+							if (timeRatio * acceptedRatio < (stopTime - startTime) / _plotAreaBounds._width)
+							{
+								needTTWriter = true;
+								data = it->getAllParameterData();
+								if (data.size() > 0)
+									needCatWriter = true;
+							}
 						}
 						else if (it->_startTime <= currentTimeInterval->_startTime && it->_stopTime <= currentTimeInterval->_stopTime && it->_stopTime >= currentTimeInterval->_startTime) // begins before, ends inside
 						{
-							needTTWriter = true;
-							startTime = std::to_string(currentTimeInterval->_startTime);
-							data = it->getAllParameterData();
-							if (data.size() > 0)
-								needCatWriter = true;
+							startTime = currentTimeInterval->_startTime;
+							if (timeRatio * acceptedRatio < (stopTime - startTime) / _plotAreaBounds._width)
+							{
+								needTTWriter = true;
+								data = it->getAllParameterData();
+								if (data.size() > 0)
+									needCatWriter = true;
+							}
 						}
 						else if (it->_startTime >= currentTimeInterval->_startTime && it->_startTime <= currentTimeInterval->_stopTime && it->_stopTime >= currentTimeInterval->_stopTime) // begins inside, ends after
 						{
-							needTTWriter = true;
-							stopTime = std::to_string(currentTimeInterval->_stopTime);
-							data = it->getAllParameterData();
-							if (data.size() > 0)
-								needCatWriter = true;
+							stopTime = currentTimeInterval->_stopTime;
+							if (timeRatio * acceptedRatio < (stopTime - startTime) / _plotAreaBounds._width)
+							{
+								needTTWriter = true;
+								data = it->getAllParameterData();
+								if (data.size() > 0)
+									needCatWriter = true;
+							}
 						}
 
 						if (needTTWriter)
@@ -2146,20 +2158,19 @@ void PanelPlotOutput::writeContext(ContextFileWriter &writer, AMDA::Parameters::
 							writer.startElement("intervals");
 							writer.addAttribute("name", inputTTOrCat._name.c_str());
 							writer.addAttribute("id", std::to_string(it->_index).c_str());
-							writer.addAttribute("startTime", std::to_string(it->_startTime).c_str());
-							writer.addAttribute("stopTime", std::to_string(it->_stopTime).c_str());
-						}
-
-						if (needCatWriter)
-						{
-							writer.startElement("parameter");
-							for (auto i : data)
+							writer.addAttribute("startTime", std::to_string(startTime).c_str());
+							writer.addAttribute("stopTime", std::to_string(stopTime).c_str());
+							if (needCatWriter)
 							{
-								writer.addAttribute(i.first.c_str(), i.second[0].c_str());
+								std::string allParams;
+								for (auto i : data)
+								{
+									allParams += i.second[0] + "|";
+								}
+								writer.addAttribute("params", allParams.c_str());
 							}
 							writer.endElement();
 						}
-						writer.endElement();
 					}
 				}
 			}
--
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