GPS Collection

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General

As described in 'Collecting Feature Data', your device's GPS (or external GPS) can be used to collection new spatial point, line and polygon features.  To collect new features via GPS, follow these steps

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• GPS Elevation Field Name - If this field name is found in point feature layers, it will be used to store the elevation value (in the currently selected units) returned by the GPS, and will be the average elevation if GPS averaging is used.

• GPS Point Count Field Name - If this field name is found in the point feature layers and GPS point averaging is used, it will be used to store the number of points averaged.

• GPS Root Mean Squared Error Field Name - IF this field name is found in a point feature layer and GPS point averaging is used, it will be used to store the RMSE of points

GPS Editing of

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Geometry

Existing features can have their geometry updated using GPS.  This is most common with point features, but is possible with line and polygon features as well.  A typical scenario is the repositioning of an inventory plot with your current GPS location.  To edit the geometry of an existing feature using your device's GPS, follow these steps:

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• Collect a new feature geometry using GPS by following the steps above for point, line or polygon

• If the feature is a polygon and the new and old geometries overlap, you will be asked if you want to replace, truncate, expand, split, etc. (see MobileMap: Editing Features  for more details)

Tracks (Travel Path, Bread Crumbs)

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MobileMap supports collecting track features via GPS.  Set the tracking feature layer in the Tracking Feature Layer setting, under the GPS and Compass section of MobileMap's general settings (gear icon). Best practice is to use a line feature layer for recording tracks. Polygons features are supported but may have issues recording if the MobileMap display shuts down due to inactivity.

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