How to avoid namespace in child nodes using FOR XML PATH?

I want to create a sitemap xml file (including images) directly from the database without another process (like transformation or another trick).

My query is:

;WITH XMLNAMESPACES(
    DEFAULT 'http://www.sitemaps.org/schemas/sitemap/0.9',
    'http://www.google.com/schemas/sitemap-image/1.1' as  [image] )  
SELECT  
    (SELECT             
        'mysite'    as [loc],
        (select   
            'anotherloc'
            as [image:loc]
        for XML path('image:image'), type
        )
    for xml path('url'), type
)
for xml path('urlset'), type

Returns:

<urlset xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    <loc>mysite</loc>
    <image:image xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
      <image:loc>anotherloc</image:loc>
    </image:image>
  </url>
</urlset>

But I need this output, without repeated namespace declaration:

<urlset xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url>
    <loc>mysite</loc>
    <image:image>
      <image:loc>anotherloc</image:loc>
    </image:image>
  </url>
</urlset>