How can i get another field value in partial balde?

[somnath-dev-dapl]

$form->add(
Input::make()->name('lat')->label('Latitude')
);
$form->add(
Input::make()->name('lon')->label('Longitude')
);

    $form->add(
        BladePartial::make()->view('admin.dealer_map')->render()
    );

In public function getForm(TwillModelContract $model)
And i created a dealer_map.blade.php

<iframe width="425" height="350" src="https://www.openstreetmap.org/export/embed.html?bbox=88.363892%2C22.572645%2C88.363892%2C22.572645&layer=mapnik&marker=22.572645%2C88.363892" style="border: 1px solid black"></iframe>

Here i want to add dynamic lat long in edit page. How can i get value Latitude and Longitude in partial balde?