On 02/07/2020 06:50, Bob Martin wrote:
> On 1 Jul 2020 at 08:07:21, "R.Wieser"  wrote:
>> I wrote:
>> Grumble ...   As the powers-that-be have not placed a weatherstation next to
>> my building there is ofcourse no way to do some direct un-compensated data
>> comparision ...  :-)
>
> Have you checked with Google Earth for altitudes?

I've found this is the most accurate way of getting the height of your
location, far more accurate than (non differential) GPS altitude.

My BME280 seems to be about 4mb out when corrected for altitude and
compared to Met Office sea level readings. It also differs from the
pressure read from my Oregon Scientific Bluetooth Weather station in a
non linear way (the same at low pressures and up to 2mb lower at higher
pressures).

But I treat it the same as the temperature readings, forget the absolute
values, just look at the trends.

---druck

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