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I have reviewed Getting polygon boundaries of City in JSON from Google Maps API? as well as the answers by german_martin and Kamil Latosinski. There are two critical weaknesses in Nominatim, using Malaysia as a case study:

1) The polygons include water (left = Nominatim, right = Google Maps)

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Above are searches for 'Selangor'. I am aware that the boundary over water is the true administrative boundary, but for most visualisation exercises, this would make it look quite weird.

2) Postcode-level data is very coarse, at least for Msia (left = Nominatim, right = Google Maps)

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Above are searches for '11900, Penang'. Nominatim just doesn't have it.

So, you can see why I really need to extract the JSON from Google Maps.

Does anyone know how to do this, preferably programatically so I can iterate over 2000 postcodes?

However, if it requires manual effort, I'm willing to do it.

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  • Just because you don't like the answer doesn't make this a new question - there is no way to steal Google's data. – Ian Turton♦ Jan 24 at 11:47
  • @IanTurton that wasn't my attention so much as wondering if new techniques were available. Do you know if it's possible to pay for it? I'm not necessarily after a free solution. – Thev Jan 24 at 13:55