A man in a khaki shirt and dark grey vest peers down at his phone beside a river bank crowded with vegetation

Sonoma Ecology Center’s Alex McDonald field checking Arundo donax in Stanislaus County. Photo: Dana Morawitz

CalWeedMapper enables natural resource managers, scientists, and others to:

  • Create maps and reports of invasive plant distribution
  • Identify management opportunities in a county, WMA, or region
  • Update species distribution data


CalWeedMapper provides a dynamic tool for mapping invasive plant distribution at the landscape level using expert knowledge.