Geocoding
Geocoding is the process of finding the correct geographic position for a record in a
table and then adding latitude and longitude values for each record in a table.
There are two main types of geocoding:
- Address geocoding uses the values of address fields such as street, city, state or province,
and postal code to attempt to position a record. Address geocoding requires a
specialized database that gives the position of various address ranges for
different streets. As a practical matter, address information is extremely rare and
expensive outside of the United States. Even within the United States,
because of the highly irregular nature of addresses in the US and the poor quality
of most address databases, address geocoding provides at best an approximation
of where a given address is truly located. See the Street Address Geocoding topic for more information.
- Spatial Geocoding matches the values of records in a database table with field values in the
table of an available drawing. The spatial layout and locations of the drawing
objects are used to determine locations for records that match object data
fields. In Manifold marketing documents this capability is at times referred to as
"generic geocoding." Spatial geocoding has the advantage of allowing spatial
matches to any available drawing. See the Spatial Geocoding with Match topic for information on spatial geocoding with Manifold.
See Also
About Geocoding
Linked Drawings and Geocoded Tables
Create a Map from a Geocoded Table
Create a Geocoded Table from a Map
Create a Linked Drawing from a Geocoded Table
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