ChannelInfo includes Latitude and Longitude, but they are not usable in geoscatter( )

Question

Fabio Battagion 2023-8-7

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https://ww2.mathworks.cn/matlabcentral/answers/2005822-channelinfo-includes-latitude-and-longitude-but-they-are-not-usable-in-geoscatter

回答： Fabio Battagion 2023-8-8

采纳的回答： Fabio Battagion

在 MATLAB Online 中打开

If I use this line of code:

[data,timestamps,channelInfo] = thingSpeakRead(12397,Fields=[1,4],NumMinutes=5)

I correctly see values, timestamps and Channel Info. In particular, Channel info shows the fields: Latitude and Longitude with some correct values (inserted via "channel setting" when the channel was created).

Now, if I run the following example using geoscatter(...):

mapData = thingSpeakRead(12397,'Location',1,'numpoints',37,'location',1,'outputformat','timetable');
geoscatter(mapData.Latitude,mapData.Longitude,'r');

I don't get any position on the map, since the latitude and longitude values are: NaN

So the question is: should I add 'latitude' and 'longitude' any time I write a data in the channel? So, what are the two fileds 'latitude' and 'longitude' of Channel Info used for? are they not available for the geoscatter() function?

Thanks

Fabio