topic // in ArcGIS Runtime SDK for iOS Questions

//

_____ — Wed, 26 May 2021 00:44:24 GMT

Re: GPS accuracy not as good as Collector, why?

EricIto — Mon, 27 Feb 2017 22:59:13 GMT

Hello Ian,

The reason you are seeing this difference is that your coworker is most likely using Apple's CoreLocation framework to get GPS information. Apple will only report 5m accuracy through CoreLocation with external receivers. Collector is connecting to the receiver via the ExternalAccessory framework and parsing the raw NMEA data from it directly.

Re: GPS accuracy not as good as Collector, why?

_____ — Wed, 26 May 2021 00:44:45 GMT

Re: GPS accuracy not as good as Collector, why?

EricIto — Mon, 27 Feb 2017 23:12:21 GMT

Ian,

Here is the Accessory Framework doc: ExternalAccessory | Apple Developer Documentation

Here is the wiki page outlining the NMEA spec: NMEA 0183 - Wikipedia

I'm not sure what your coworker is trying to achieve, but we also have some utilties to launch Collector from your application (maybe you can defer your data collection to Collector): GitHub - Esri/collector-integration: Multi Language repository that contains documentation and sample code for creating …