What you need to know about reverse geocoding API
Geocoding is the process that involves the conversion of addresses into geographical coordinates, which are commonly used for placing markers on maps and map positioning. Reverse geocoding is the conversion of geographic coordinates into readable addresses. The reverse geocoding API service also lets the map user find the address of a given place ID. This service is available in Google maps where the user is provided with a direct way to assess the services mentioned earlier through an HTTP request. Check out Ziptastics mobile API for zip codes and learn more how this works.
Before Using The Service
It is also important to note that geocoding is a resource intensive task. If possible, pre-geocode the available addresses and store the result in a tentative cache that you have designed personally.
To use the Google Maps API, you are required to have an API key. Before you commence the development of the geocoding API, consult the API usage limits and requirements.
Vital Parameters In A Reverse Geocoding Request
- Longitude and latitude values were showing the exact location which the user needs to obtain the readable addresses or the place identification of the region the user intend to obtain the human-readable addresses.
- The user’s applications API key. This key is for identifying the user’s applications for quota management
- The language in which the results will be returned. The supporting languages are often updated by Google. Therefore this should not be daunting. If the language is not available, you will notice that the geocoder attempts to use the language you selected in the Accept-Language header.
- Different address types separated by a pipe. Note that if you specify a type, the resulting list will be restricted. On the other hand, if you select multiple types, the API will match any of the types in the results by returning them.
- Different location types also separated by a pipe. This will also work the same as the address types.
Reverse Geocoding Status Codes
The field within the geocoding objects shows the status of the request and may provide information as to why reverse geocoding is not working together with a debugging option.You may also notice the following values in the field:
- “OK” to show that no errors occurred in the returning of addresses
- “ZERO RESULTS” to show that reverse geocoding was a success
- “OVER QUERY LIMIT” to show that the user is way above their quota
- “REQUEST DENIED” to indicate the denial of a request due to not following instructions