The 2025 AGIC ArcGIS Online Student Competition is now open. Visit the competition webpage for more details, including deadlines, rules & guidelines, and the adult sponsor compeitition registration form. This year, adults may sponsor one or more students in grades Kindergarten through 12th grade. Prizes include a chance to win a $100 gift card. Adult sponsors must register their student(s) by April 18, 2025 and submit their student's entries no later than May 5, 2025.
One of the most challenging environments for accurate geoid models is in high, rugged mountain areas. Orthometric heights derived from GNSS and a geoid model can easily have errors at the decimeter level.
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