View do Mapa

MapaPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:maps="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps"
             xmlns:CustomMap="clr-namespace:RouteMap.CustomRender;assembly=RouteMap"
             x:Class="RouteMap.Views.MapaPage">
    <ContentPage.Content>
        <StackLayout Padding="30">
            <Entry Placeholder="Origem" Text="{Binding Origem}"/>
            <Entry Placeholder="Destino" Text="{Binding Destino}"/>
            <Button Text="Pesquisar Rota" Command="{Binding PesquisarCommand}"/>
            <CustomMap:MapCustomRender x:Name="MyMap" 
                                       WidthRequest="320" 
                                       HeightRequest="300" 
                                       IsShowingUser="True" />
        </StackLayout>
    </ContentPage.Content>
</ContentPage>