To Add two fields to product for storing a latitude and a longitude, then for this you have to create a new form widget to display the latitude and longitude of a product's origin on a map.
Displaying the two position fields and a map widget using them in a new notebook page of the product's form view.
For example see the code is given below.

local.WidgetCoordinates = instance.web.form.FormWidget.extend({
    start: function() {
        this._super();
        this.field_manager.on("field_changed:provider_latitude", this, this.display_map);
        this.field_manager.on("field_changed:provider_longitude", this, this.display_map);
        this.display_map();
    },
    display_map: function() {
        this.$el.html(QWeb.render("WidgetCoordinates", {
            "latitude": this.field_manager.get_field_value("provider_latitude") || 0,
            "longitude": this.field_manager.get_field_value("provider_longitude") || 0,
        }));
    }
});

instance.web.form.custom_widgets.add('coordinates', 'instance.oepetstore.WidgetCoordinates');
<t t-name="WidgetCoordinates">
    <iframe t-attf-src="https://maps.google.com/?ie=UTF8&amp;ll={{latitude}},{{longitude}}&amp;output=embed" height="300" width="400">
    </iframe>
</t>