FIELD CHALLENGE // FIVE SITES

TOPO SURVEY.

You cannot see the true ground yet. Choose where to take shots, build your surface, then compare your model with the terrain that was hiding underneath.

THE BRIEF

READ THE GROUND WITH POINTS.

Each shot gives you one accurate elevation. The challenge is deciding where another point will improve the model—and where it will only waste time.

Start with coverage around the site, then add observations where the ground appears to change. On a keyboard, move the survey cursor with the arrow keys and press Enter to take a shot.

Site: 24 × 24 m. Elevations are simulated for this educational challenge.

Tap or click the plan to take a shot. Keyboard: arrows move the cursor; Shift + arrows move faster; Enter records a shot.

Take your first shot.

Recorded shots (0)

FIELD NOTE

THE EDGES MATTER.

A model can only describe what your observations support. Shots around the limits help establish coverage; additional shots reveal ridges, valleys and sudden changes in slope.

Minimum: three shots
Every shot is exact
Your surface is interpolated between shots
Outside the observed area, uncertainty increases

This is an educational game—not surveying software, professional advice or a statement of acceptable survey tolerance. Real topographical surveys require appropriate control, equipment, observations, breaklines, checks and a scope suited to the intended use. See the website terms.