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World Circle Radius Population Challenge

Directions

The object of this quiz is to adjust each circle’s radius so it contains the target population shown at the right. When you click Start you will be shown a marker on a random populated world grid square (there are over 800K 10×10 km grid squares used for the data, courtesy of https://human-settlement.emergency.copernicus.eu/index.php). Also you will see an adjustable circle of radius 500 km to start. Adjust the circle’s radius by dragging it until it contains the target number of people shown – this target will be between 2.5 and 250 million people. Then click submit. You are scored on how close your circle’s population is to the target.

Enter guesses above to begin.

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World Circle Population Guess Challenge

You will be shown 10 different circles of radius 250-2000 km. Using the slider (or manually typing into the box below the slider), guess the population contained within each circle then click SUBMIT for each one. Populations are based on world population density at https://human-settlement.emergency.copernicus.eu/index.php.

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Any INTERSECTING areas are only counted one time, so no population will be counted more than once.

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World 10 Circle Population Challenge

The object of this quiz is to place 10 circles of radius 1000 km on the map so that they contain the largest total population.

When you begin you'll be given a 1000-km radius circle centered on the map. Move it using the mouse and click SUBMIT. You will be given a score for that circle corresponding to the total population contained within it based on world population density at https://human-settlement.emergency.copernicus.eu/index.php. Try to complete all 10 circles with the highest total score.

Any INTERSECTING areas are only counted one time, so no population will be counted more than once.

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BautyArg

1 month ago

Report youself if you came from JetPunk :3

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darin

1 month ago

Reply to BautyArg

What’s the page with the link from Jetpunk?

sillyguri

1 month ago

Reply to darin

It was just sharing this quiz among a variety of friends in the corresponding Jetpunk discord server.

mlnbld

2 months ago

Really fun quiz idea!