<?xml version="1.0" encoding="UTF-8"?>
<!-- Public marketing routes only. Add new landing pages here as they ship.
     App/auth routes (/portal, /signin, /admin, /api/*) are intentionally absent
     and Disallowed in robots.txt. Update <lastmod> when the page content changes. -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url>
    <loc>https://subsurfacemodels.com/</loc>
    <lastmod>2026-05-28</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>
</urlset>
