Skip To Content

FAQ for data collection


A new Collector app is available on Android and iOS. For frequently asked questions about the new app, see FAQ.

The following are some frequently asked questions that Collector users often have. For FAQ of data collection map authors, see FAQ for map creation.

How do I get the app?

Collector for ArcGIS is available on Google Play or the Amazon Appstore for Android devices, the App Store for iPad and iPhone, or the Microsoft Store for Windows 10 devices.


If you can't access Google Play or the Microsoft Store, see the technical article about downloading Collector from Esri.

Can I work with related records in Collector?

Yes. The following editing scenarios for related features and tables are supported:

  • Feature-to-table relationships (one-to-one and one-to-many)
  • Feature-to-feature relationships (one-to-one and one-to-many)
  • Table-to-table relationships (when the first table is accessed through a feature)

When using related data, it is strongly recommended that you use GlobalIDs when defining relationships. User-maintained relationships are not recommended. See Supported data for details.

How can I give feedback on the app?

The Collector for ArcGIS team would love to hear from you about the app. If you have feedback or inquiries, send an email to You can also provide feedback within the Collector for ArcGIS GeoNet community page.

What is the licensing of the app?

Collector for ArcGIS is available to members of ArcGIS organizations. This includes those with a subscription to ArcGIS Online or an account on ArcGIS Enterprise. For more information, see Licensing Terms of Use.

Can I roll back to a previous version of the app?

No, rollback to a previous version of the app is not supported. For details, see the Product Life Cycle for Collector for ArcGIS (Android, iOS, or Windows).

Is my GPS receiver compatible with Collector?

Collector supports internal GPS receivers and external GPS receivers that output NMEA sentences. See GPS receiver support for a list of NMEA sentences that Collector can read and a list of GPS receivers that can be used with Collector on supported iOS devices.

How does Collector determine the accuracy of GPS positions?

Collector reports accuracy based on the most accurate information available. Collector first tries to determine accuracy from NMEA sentences, which can be outputted by both internal and external receivers. Collector can read various types of NMEA sentences, including GST and GSA sentences.

If Collector receives GST sentences, which contain accuracy information for a particular coordinate, it uses them to determine accuracy. By default, the horizontal and vertical accuracy numbers are specified in root mean square (RMS). The level of confidence using RMS is 63 percent to 68 percent for horizontal accuracy, and 68 percent for vertical accuracy. If the 95% confidence accuracy setting is enabled, Collector applies a conversion factor to the RMS calculation and reports horizontal and vertical accuracy with a 95 percent confidence level.

If Collector doesn't receive a GST sentence from a GPS receiver, but does receive a GSA sentence, Collector estimates accuracy using horizontal dilution of precision (HDOP) and vertical dilution of precision (VDOP). The estimated horizontal accuracy is calculated by multiplying HDOP by 4.7, and the estimated vertical accuracy is calculated by multiplying VDOP by 4.7.

If Collector does not receive valid NMEA sentences from a receiver, it uses the accuracy reported by the device's location service.

What level of accuracy can I expect from an external GPS receiver?

The best way to determine the accuracy level to expect from a particular external GPS receiver is to check the website of the receiver's vendor for GPS specs. If you would like to compare accuracy levels of various external GPS receivers, you might find the MTDC GPS Receiver Horizontal Accuracy Reports and Tested Accuracies published by the USDA Forest Service helpful. This organization has been testing GPS receivers of various grades to determine their horizontal accuracy in different canopy cover conditions, and in some cases, different GPS settings. While Esri does not endorse the Forest Service's results, they may be a useful guide to determine which receiver best suits your organization's needs. Esri does not officially recommend any specific receiver for use with Collector.

Using an Android device, can I save my downloaded basemaps to my SD card rather than my device's internal storage?

Yes, you can save your downloaded basemaps to your Android device's SD card. To use the SD card, go to the Map Gallery and select Settings from the Overflow menu Overflow. Under General, set Basemap download location to SD card. By default, it is set to Internal storage.


If your device doesn't support using an SD card, you won't see the Basemap download location setting.