Collector for ArcGIS extends the reach of ArcGIS into the field so that you can improve the accuracy and currency of your data. Using your mobile device you can collect and update spatial and tabular data managed inside of your GIS. Collector is available today in the*iTunes App Store, Google Play and Amazon App Store.Location Services
With your permission, Collector for ArcGIS can use location services to capture and update data. Location services use information from cellular, Wi-Fi, Global Navigation Satellite Systems (GNSS) networks and Bluetooth to determine your approximate location. A cellular or Wi-Fi network connection provides initial location information and helps you locate visible GPS satellites faster. Most cellular- enabled iOS and Android devices come with integrated GNSS receivers that include support for GPS/GLONASS/Galileo or Beidou systems.
Depending upon the device manufacturer, the locational accuracy of the integrated GNSS receiver can vary considerably. Most consumer-grade devices or GPS receivers are accurate up to about 5 meters. Bluetooth is another method of providing spatial information to location services. There are a number of external GNSS receivers you can pair with your device to determine location. Some are spatially accurate within 1 meter. These receivers can apply a differential correction to improve the accuracy of their positions using either a Satellite-based Augmentation System (SBAS) or a Real-time Kinematic system (RTK).
Location and Coordinate Systems
Understanding how Collector for ArcGIS and location services work with coordinate systems is important when you want the best accuracy from either an integrated or Bluetooth-paired GNSS receiver.
By default, positions received from location services use the latest revision of the World Geodetic System (WGS 84) and Collector expects that the spatial information will be provided in this system.When using differential correction, knowing the geodetic reference frame and epoch of the correction source is critical to creating accurate data. Both SBAS and RTK provide a set of corrections that your GNSS receiver applies using a geodetic reference frame to improve accuracy. The SBAS approach uses a celestial reference frame called the International Terrestrial Reference Frame or ITRF (to which WGS