Source: https://developers.woosmap.com/products/geofencing-sdk/flutter-plugin/guides/find-nearest-pois/

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# Tracking Profiles



## Use Search API to monitor regions around POIs

Regions creation is enabled on the nearest result of the Search API request. More details in
the [Monitor POIs documentation](/products/geofencing-sdk/flutter-plugin/guides/monitor-pois/#create-regions-from-woosmap-search-api-assets)

### Radius of POI

When you create a Geofence around a POI (previously imported from Woosmap), manually define radius value:

``` dart
Future<String?> returnVal = _geofencingFlutterPlugin.setPoiRadius("100");

returnVal.then((value){
    showToast(value!);
}).catchError((error) {
    showToast('An error occurred: ${error.message}');
});
```

or choose user_properties subfield that corresponds to radius value of the Geofence:

``` dart
Future<String?> returnVal = _geofencingFlutterPlugin.setPoiRadius("radiusPOI");

returnVal.then((value){
    showToast(value!);
}).catchError((error) {
    showToast('An error occurred: ${error.message}');
});
```

### Get POI (Woosmap Assets) from the local database

Call `getPois` method to get an array of POIs from local DB.

``` dart
// Get single POI
Future<List<Poi>?> returnVal = geofencingFlutterPlugin.getPois(poiId);

returnVal.then((pois){
    if (pois != null){
        debugPrint('POIs: ${pois.length}');
    }
}).catchError((error) {
    debugPrint('An error occurred: ${error.message}');
});

// Get all POIs
Future<List<Poi>?> returnVal = geofencingFlutterPlugin.getPois();

returnVal.then((pois){
    if (pois != null){
        debugPrint('POIs: ${pois.length}');
    }
}).catchError((error) {
    debugPrint('An error occurred: ${error.message}');
});
```

### Remove POI (Woosmap Assets)

Call `removePois` method to remove all POIs

``` dart
Future<String?> returnVal = geofencingFlutterPlugin.removePois();

returnVal.then((value){
    debugPrint(value!);
}).catchError((error) {
    debugPrint('An error occurred: ${error.message}');
});
```

### Refresh POI (Woosmap Assets)

Call the `refreshPois` method to get updated information about POIs from the Woosmap server

``` dart
Future<String?> returnVal = geofencingFlutterPlugin.refreshPois();

returnVal.then((value){
    debugPrint(value!);
}).catchError((error) {
    debugPrint('An error occurred: ${error.message}');
});
```