Crowdsourced City Extents

Following up from my Glasgow Regions Mapped Update.

Alasdair Rae recently started a crowdsourcing project for four cities in the UK: London, Birmingham, Manchester, and Glasgow. Original page. Write up of the results. The post was however very popular and resulted in responses from around the world.

Since the project was created with the excellent code from Nick Martinelli, the data can be downloaded by anyone.

So I created a breakdown of the number of responses in 1 km grids for each city that received at least 5 responses.

The full album, ordered by country name and then city name can be found:

Here.

Highlights

Glasgow

The west end is the true Glasgow.
UnitedKingdom_Glasgow_extents46

Edinburgh

Very inclusive.
UnitedKingdom_Edinburgh_extents33

Liverpool

Much larger and inclusive than Manchester.
UnitedKingdom_Liverpool_extents20

London

The M25 provides a very handy limiting barrier.
UnitedKingdom_London_extents29

LA

Far reaching urban sprawl.
UnitedStatesofAmerica_LosAngeles_extents10

New York

Probably some selection bias, with crowd sourcing more popular in Brooklyn.
UnitedStatesofAmerica_NewYork_extents32

Washington

DC.
UnitedStatesofAmerica_Washington_extents21

All cities.

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