Getting coordinates from multiple providers
Thomas Kandler b82258d186 Updated 8 years ago
API.json Created 8 years ago Updated 8 years ago
cities.csv Created 8 years ago
cities.txt Created 8 years ago
console_output.txt Created 8 years ago Created 8 years ago
outliers.txt Created 8 years ago



Getting a unified way to access the most important geocoding APIs (Nominatim, Google, MapQuest, HERE, OpenCage) to compare and evaluate.


Just run the script by providing a .txt file with each location to geocode on a new line, e.g.:

cat places.txt
python places.txt

The script will access API.json for API keys (if neccessary) and will output cities.csv as well as outliers.txt. Don't forget to update your API.json to get access to the MapQuest, HERE and OpenCage geocoding results. The outliers.txt is some kind of shoot from the hip for evaluating the quality of the data. Outliers will be summarized in the console and simply mean that the coordinates for a location are not within the standard deviation of all 5 providers. This is by no means a real measure for quality, just a hint or a reminder to implement some real quality measurement.


API.json - credentials for the geocoding APIs
cities.csv - main output; CSV with header; example results included
cities.txt - input file; each location on new line; examples included
console_output.txt - example for console output
outliers.txt - supposed outliers


  • querying APIs works
  • generating a CSV works
  • getting (somewhat questionable) descriptive statistics works


  • well-thought quality control
  • optimized output
  • arguments, e.g. choice of providers
  • error/exception handling
  • simplification/refactoring