Background, examples and recipes for common use cases and questions
Overview / General Background
Why Open Data?
What benefits does open data offer?Geocoding vs Geosearch
What is the difference between geocoding and geosearch?Geocoding
Concepts
Reverse Geocoding
All aspects of converting coordinates into location informationComparing and testing geocoding services
Evaluating geocoding services.Geocoding and postal codes
Common questions and misunderstandings related to post codes.
Tips for using the OpenCage Geocoding API
Formatting your query
Clean up your geocoding queries to get the results you want.Speed up your geocoding
Run your geocoding faster.Geocoding large datasets
Points to consider when processing massive volumes of locations.Geocoding accuracy
Is this the result you are looking for?Limit API results to a certain country or region
Only get the geocoding results you need.Formatting Addresses
Presenting location information in the format users expect.Show an imprecise location
Show only a rough or imprecise location to preserve privacy.
Recipies for common situatons
Putting results on a map
How to display geocoding results on a map.Convert image GPS coordinates into location information
How to turn image coordinates into useful location information.Convert coordinates to country
Determining which country coordinates are located in.Determine the ISO codes for a location
Map coordinates or addresses to ISO 3166 codes.Determine the county for an address
Which county is this address in?
Migrating to OpenCage
Dealing with API keys
Other geocoding topics
Geosearch / Autosuggest
What is Geosearch?
Helping users turn search queries into locations.Why is geosearch needed?
Location search is not the same as traditional web search.Consumer expectations for location search
UX challenges in building a location autosuggest.Geosearch: Technical Considerations
Technical challenges in building a location autosuggest.Other Geolocation Technologies
Browser Geolocation
Determine a user's location with browser geolocation.IP Geolocation
What is IP geolocation? How does it differ from geocoding?
This image shows the node density of OpenStreetMap data in summer 2015.
It's one of many data sources we use.
Data © OpenStreetMap contributors, Imagery © Martin Raifer, cc-by
Open as larger interactive map
It's one of many data sources we use.
Data © OpenStreetMap contributors, Imagery © Martin Raifer, cc-by
Open as larger interactive map