Node-RED block in Snap4City Microservice library node-red-contrib-snap4city-user is "recommendations-within-circle">
    <p>It provides a list of suggestions of services near to indicated circle.
    </p>

    <h3>Inputs</h3>
    A JSON with these parameters:

    <dl class="message-properties">
        <dt>latitude
            <span class="property-type">number</span>
        </dt>
        <dd> latitude of a GPS position</dd>
        <dt>longitude
            <span class="property-type">number</span>
        </dt>
        <dd> longitude of a GPS position</dd>
        <dt>profile
            <span class="property-type">string</span>
        </dt>
        <dd> Profile of the user to get recommendations
        </dd>
        <dt>maxdistance
            <span class="property-type">number</span>
        </dt>
        <dd> maximum distance from the GPS position of the services to be retrieved, expressed in Km (0.1 is used if parameter
            is missing) if it is equal to “inside” it searches for services with a WKT geometry that contains the specified
            GPS position (e.g a park)</dd>
        <dt>maxresults
            <span class="property-type">number</span>
        </dt>
        <dd> maximum number of results to be returned (if parameter is missing 100 is assumed), if it is 0 all results are returned</dd>
    </dl>

    <h3>Outputs</h3>
    <dl class="message-properties">
        <dd> It provides a JSON Object with all the routes that have stops on the specified area. For each route the following
            properties are provided: • lineNumber: the line short name • lineName: the line long name • route: the route
            name • routeUri: an URI identifying the route (it can be used to retrieve all the stops of the route) • direction:
            with first and last stop • agency: with agency name • agencyUri: with agency URI • polyline: with the WKT geometry
            of the route</dd>
    </dl>

    <h3>Details</h3>
    <p>The node can receive a JSON with the parameters described in the Inputs section and with them generate the output JSON.
        If the values are not present in the input JSON, these are read by those in the configuration. If they are not present
        in either part, an error is generated for the necessary parameters.</p>