I want set values to my html inputs via event emitter and when submitting the form the values are not binding

this.lat.emit(this.latitude.toString());
this.lon.emit(this.longitude.toString());

This is my parent.component.html

 <ngx-map (lon)="getLon($event)" (lat)="getLat($event)" ></ngx-map>

This is my parent.component.ts where catch the emitted values
<form [formGroup]="form" (ngSubmit)="create()">

            <input
              status="primary"
              placeholder="Longitude"
              formControlName="longitude"
              type="text"
              nbInput
              fullWidth
              [value]="lon"

            />
            <input
              status="'primary'"
              placeholder="Latitude"
              formControlName="latitude"
              type="text"
              nbInput
              fullWidth
              [value]="lat"
            />
     </form>

I am facing issue while html inputs via event emitter of 
my perfect essay writing website's HTML. 
Kindly help me out by checking my code. Thanks!