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Re: [magnetometer] Add RawMagnetometer, for uncalibrated readings.

From: Anssi Kostiainen via GitHub <sysbot+gh@w3.org>
Date: Wed, 10 May 2017 10:58:26 +0000
To: public-device-apis-log@w3.org
Message-ID: <issue_comment.created-300447930-1494413904-sysbot+gh@w3.org>
>The feature detection algorithm doesn't hold for reasons described in the generic sensor spec.

Can you expand on this, with an example preferably.

>The sensor is not uncalibrated in the specified definition of the term, it's exposing bias.

We define the term "uncalibrated magnetic field" as follows in the spec ([preview][1]):

The **uncalibrated magnetic field** is the magnetic field without hard iron distortion correction and with soft iron distortion correction applied, and as such reports changes in the magnetic field caused by magnetized objects moving near the magnetometer.

The proposed name `UncalibratedMagnetometer` is consistent with that definition of the term.

[1]: https://rawgit.com/riju/magnetometer/rawMag/index.html#uncalibrated-magnetic-field

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