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RGarcia RGarcia 37 2 2 bronze badges. Add a comment. Active Oldest Votes. Then how Geocoding works? There are some approaches that a geocoder could do in converting an address into coordinate such as absolute position, relative position and address interpolation. Absolute position is finding a coordinate of an address based on an object location, for example address The Art Institute of Chicago, , South Michigan Avenue.
The key word of the address is The Art Institute of Chicago , the location database of a geocoder stores the object position, therefore based on object's name the geocoder will take the coordinate of the address.
This approach will return a good accuracy as long as the object could be found in the database. Relative position geocoding is finding a position of address based on spatial relation. More precise an object is defined spatially with another object, will return more correct probability.
It is like asking someone, where is building X? The answer could be it is ft to the north from Y building, or it is in front of Y building. Here is Y is a reference location which is famous or a landmark that everybody is supposed to be known.
Address interpolation is the next approach in defining a location. This approach will work in an area where building distribution is in order along a road. For example a building number at Olympus street as shown in figure 1. The building is between building number and , therefore the building could be located with a good precision. Unfortunately this method won't work at any place around the world, because not every country has a good building distribution.
Figure 1. In this post, we will discuss only Nominatim geocoder service. To use this geocoding API service we have to define a query q in the nominatim address. The result of this query will return Open Street Map with a list of geocoding results as in figure 2. Figure 2. APIs for reverse geocoding are for developers that want to quickly add reverse geocoding functionality to their applications without having to learn the complete code or write it out.
Businesses in the mapping industry including GPS software manufacturers, supply chain logistics, delivery companies, tourism, and others also will find APIs with reverse geocoding helpful.
An API for reverse geocoding is important because the latitude and longitude of an area remain the same. This makes it a reliable way to locate streets, landmarks, and other places. When businesses deliver products or bill a commercial customer, knowing just the street address may not be sufficient. The customer may have several buildings on the commercial property, one for administration, another for accepting deliveries, and another for packaging.
Having the precise building address for the latitude and longitude location may help avoid confusion and expedite delivery processes. Developers can expect to bring their interactive mapping applications to market faster when they use APIs for reverse geocoding.
Businesses can expect to get more accurate and detailed responses to their queries. Reverse Geocoding and Geolocation Service by Noggle is a free API that allows developers to embed the functionality to locate the largest city or nearest one to the latitude to longitude location.
In addition, to reverse geocoding, the API can look up the street address and obtain the latitude and longitude of that location forward geocoding. Google Maps Geocoding.
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