How good is Open Data?

Mykola Kozyr
Mar 27 · 4 min read

Episode 1. OpenStreetMap Nominatim Geocoder

Coverage

It seems to be a simple task — check if the geocoder works for all the countries: find some sample of addresses for all the countries and run the geocoder. Okay, it seems easy. Let’s just find the data. Believe me or not — it is not what you can find by just googling it. I was sure GIS-geeks met similar tasks, so I went to Twitter, asked the community, and got the brilliant answer:

Direct Geocoding & Countries Data. Screenshot from EOS Vision workspace

Precision

During the previous task I have spotted an interesting thing — reverse geocoding returns not only the address but also latitude and longitude:

{  
"type":"FeatureCollection",
"licence":"Data © OpenStreetMap contributors, ODbL 1.0. https://osm.org/copyright",
"features":[
{
"type":"Feature",
"properties":{
"place_id":"111094940",
"osm_type":"way",
"osm_id":"154201801",
"place_rank":"26",
"category":"highway",
"type":"unclassified",
"importance":"0.1",
"addresstype":"road",
"name":null,
"display_name":"Palianychyntsi, Fastiv Raion, Kyiv Oblast, 08542, Ukraine",
"address":{
"village":"Palianychyntsi",
"county":"Fastiv Raion",
"state":"Kyiv Oblast",
"postcode":"08542",
"country":"Ukraine",
"country_code":"ua"
}

},
"bbox":[
29.9982289,
49.99599,
30.004028,
50.0029167
],
"geometry":{
"type":"Point",
"coordinates":[
30.000565205347,
50.0005604121134
]

}
}
]
}

Vision

Cloud based ecosystem for geodata visualization and analysis. Improve your business performance by capitalizing your data intelligence

Mykola Kozyr

Written by

Geographer. Member of of a team building revolutionizing SaaS for geospatial data analysis and visualization.

Vision

Vision

Cloud based ecosystem for geodata visualization and analysis. Improve your business performance by capitalizing your data intelligence