Wednesday, March 1, 2017

What is Geocoding?

Geocoding is the process of finding geographical coordinates (latitude and longitude) of an address or place and locating it on map. It can also be termed as transforming address string into spatial data. Geocoding determines the location from the address by comparing and matching it against large database or a gazetteer. Match can be based on numerous parameters such as street, locality, ward, district, city, pincode, etc.

The input address to be geo-coded can be any valid string viz. name of place, building, locality, any mountain, bridges, rivers, etc. The accuracy of the geocoding is measured on various parameters and input data for best match. The match can be absolute and relative basis input string as well as database and gazetteer against which it is matched. Generally, the location is calculated based on central location for a group of address like common location for all address in a block, society. It can also be precise for any famous landmark such as monuments, historical places.

Geocoding can be performed on single address or on list of addresses. The former process is known as single line geocoding while the later is called as batch geocoding process. It is basically implemented with the help of goecoder. Geocoder is a software that performs the task of finding geographical coordinates from a geographical information system.
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