Overview

The project produced about of 400-thousand files of point forecast data from the various methods used within the project. The idea of the web-demonstrator is to set up an interface to browse through the various forecast data sets in an interactive way and to develop illustrations which help to visualize the forecasting results.

This page describes the visualization being available at "DnicastDemo." and provides sub-chapters describing shortly the nowcast methods.

Demonstrator Interface.png
Figure 1: User Interface

The user interface consists of four parts. The left hand block is for the selection of the forecasting method the user is interested in viewing. On the top part, the site, the date and the plotting type can be selected. The right hand block gives information about the selected site and method. In can contain additional information e.g. on the specific day. The central part is the plotting area. It contains a plot of the selected forecasting day

Plotstyles

Lineplot

Line Plot_demonstrator.png
Figure 2: Example Line Plot

The line plot shows the ground measured data (if available) and the single forecasts for one site in one day. The single data plots can be switched on and off by ticking the symbols on the legend on the right hand side. This allows the visualization of the performance of the single forecasts during the day. Switching on and off single forecasts eases viewing the results of single forecasts.

Heat Map Plot
Heatmap plot_demonstrator.png
Figure 3: Example Heat Map Plot

Within the heatmap plot the time of the day is plotted on the x-axis and the forecast time on the y-axis. The measured and forecasted radiation is visible as a colour code. It ranges from dark black for 0 W/m? to a light yellow for 1000 W/m?. The measured ration is of course the same for all forecasts times and appears as a background colour map. The forecasted time series start along a diagonal line which corresponds to the forecast time and the results are plotted towards the right. Differences in measurement and forecasts can be spotted by the different colours. The advantage of the heat map is to show the whole day in one picture. The example in fig 3 shows a clear day which can be seen by the smooth contours in the background. The forecasts are always lower than the measurement, which can be seen by the darker colours. In the afternoon there is one forecast which expects clouds coming in, shown by the change to much darker colours. The following forecast changes the behaviour again.