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What I have:

  • an Excel file with 11 thousand address (street + zip code + city)
  • all address are from Portugal
  • the address are not accurate (some address have the name street in a short way)

What I am looking for:

  • get "geocodes" (latitude/longitude) of all address.
  • using a opensource API, or a service of a website

What I will do with the data collected:

  • with the "geocodes" I will create a file like a KML file with all address and some others information about each address
  • the "geocodes" will be use in a commercial product by the company I am working.

In my research I have found some API and websites. But I am not sure if they suit my requirements

  • Google Maps API
    • I think it was a limit if 2500 requests per IP per day.
    • I think I can not collect the latitude/longitude, only show the location in a Google Map webpage
  • Yahoo PlaceFinder API
    • I think it is not free
  • website Gisgraphy
    • The results on my test are not good for Portugal address
  • website GPS Visualizer's Address Locator
    • uses Google and API Yahoo API, So have the same restrictions above

Some links I found:

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I think you will find numerous answers to similar questions on our site by searching the geocode tag.

A few that stick out are:

  • Good job with the recursive answer! Thanks for including some specific answers. – Jeffrey Jun 11 '13 at 18:20
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Maybe this will also work for you: How to find coordinates for a lot of locations based on the town or village name?

The presented programme uses Nominatim (Open Street Map). I expect it to also work well with street names in most cases.

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