{"id":3615,"date":"2018-06-05T14:26:14","date_gmt":"2018-06-05T12:26:14","guid":{"rendered":"https:\/\/www.adrena-software.com\/adrena-and-georeferenced-data-3\/"},"modified":"2019-01-22T15:32:22","modified_gmt":"2019-01-22T14:32:22","slug":"adrena-and-georeferenced-data-3","status":"publish","type":"post","link":"https:\/\/www.adrena-software.com\/en\/adrena-and-georeferenced-data-3\/","title":{"rendered":"Adrena and georeferenced data"},"content":{"rendered":"

By Jean-Yves Bernot,\u00a0French meteorologist, specializing in racing.<\/em><\/p>\n

Several weather forecast documents are available. They are coming from different sources: numerical files in Grib format, weather charts in various images formats (jpg, png, etc.), satellite images, etc. The ideal is to be able to superimpose them in order to compare the different weather data with one another as well as with Adrena routings. To do so, the georeferenced images overlay function available in Adrena Version 13<\/a> can be used.<\/p>\n

Weather charts and Grib files overlay<\/h2>\n

It is not always easy to make a correct analysis of a weather forecast situation by reading a Grib file. In the following example, the low pressure situation off the American coasts does not seem clear.<\/p>\n

\"\"<\/a> \u00a0<\/span><\/p>\n

 <\/p>\n

In the following one, it makes more sense!<\/p>\n

\"\"<\/a><\/p>\n

We superimposed the NOAA analysis chart<\/a> on the GFS Grib file.<\/p>\n

Method 1: use a Roadbook<\/h3>\n

To carry out the operation, we used the Roadbook function: insert an image.\u00a0<\/span><\/p>\n

\"\"<\/a><\/span><\/p>\n

The selected chart can be properly positioned by adjusting the edges of the image – right click, move the point. The chart will be saved in the mm directory (Multimedia) of Adrena.<\/p>\n

Once it is saved, just replace the old chart with the new one which will be directly positioned when the Roadbook is activated.<\/p>\n

Note 1: it is better to superimpose data coming from the same sources \u2013 GFS model and weather charts from the NOAA for example.<\/p>\n

Note 2: this operation is only possible if the weather chart is available in Mercator projection which is the case for NOAA charts.<\/p>\n

NOAA websites:<\/strong><\/p>\n