Update README.md

README.md

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 ## This dataset offers hourly temperature records from all France metropolitan and overseas weather stations from 1777 to March 8, 2024
 
-The data comes from the Météo France database, made available as open source since January 1, 2024:
+The data comes from the Météo France database, made available as open source since January 1, 2024
+
+|Features     | Description                                                                    |
+|-------------|--------------------------------------------------------------------------------|
+| LAT         | latitude, negative south (in degrees and millionths of degree)                 |
+| LON         | longitude, negative west of GREENWICH (in degrees and millionths of a degree)  |
+| ALTI        | altitude of the base of the shelter or rain gauge (in mm)                      |
+| AAAAMMJJHH  | date of measurement (year, month, day and time)                                |
+| T           | instant temperature under cover (in °C and 1/10)                               |
+
+
 - 'LAT' latitude, negative south (in degrees and millionths of degree)
 - 'LON' longitude, negative west of GREENWICH (in degrees and millionths of a degree)
 - 'ALTI' altitude of the base of the shelter or rain gauge (in mm)