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On Aug 29, 2018, 8:42 PM, at 8:42 PM, Thomas Keffer <[email protected]> wrote: >First of all, I suspect you are using a database with a unit system of >METRIC, which measures in centimeters (not millimeters). > >As for the difference between 25.654 and 25.8, there can be several >explanations. Here's one example: say you are using a 5 minute archive >interval. For WeeWX, the first archive interval of the day is >timestamped >0005. It measures the rain that fell between 0000 and 0005. However, >many >weather services include the measurement timestamped 0000. > >To get any more specific, we would need more information, such as >exactly >what unit system you are using, and how the Netatmo app is calculating >daily rainfall. > >-tk > > >On Wed, Aug 29, 2018 at 2:23 PM Valley <[email protected]> wrote: > >> I use weewx with a Netatmo rain gauge. It works well but I cannot >figure >> out how the total amount of daily rain is calculated. >> >> Since Python is too hard for me to learn, I use php coding to query >the >> database. >> >> The other day we got 25.8 mm of rain. A figure reported by my Netatmo >app >> on the iPhone and on the Netatmo web page. Also very close to what I >could >> read on an old fashioned measuring glass in the garden. So the figure >25.8 >> mm is definitely ok. >> >> The graph in weewx also shows 25.8 (hard to read exactly, but >somewhere >> between 25 and 26) (see image). Now: If I look at the >> table archive_day_rain for that specific day it says sum=2.5654 (also >> wsum=2.5654). How is 2.5654 becoming 25.8? Difference between sum and >wsum? >> >> I also queried the archive table with sum(rain) for all records for >that >> date. As a result I got 2.5654, the same as in the sum column in >table >> archive_day_rain. >> >> So the question is: How is the original data from Netatmo actually >stored, >> and how is it that the graph shows me the correct amount? >> >> Very puzzling for me! >> >> /Valley >> >> Here is a picture of the graph >> >> [image: raingraph.png] >> >> -- >> You received this message because you are subscribed to the Google >Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, >send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > >-- >You received this message because you are subscribed to the Google >Groups "weewx-user" group. >To unsubscribe from this group and stop receiving emails from it, send >an email to [email protected]. >For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
