Update README.md
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@@ -119,7 +119,7 @@ SELECT (geocode_postalcode_points(Array['03204'],Array['ESP'])).*
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2. Georeference the table using field11 as longitude and field10 as latitude in order to construct the_geom.
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3. Add column iso3 (text) and run sql/build_zipcode_points_table.sql.
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3. Add column `iso3 (text)` and run `sql/build_zipcode_points_table.sql`.
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**Alternative manual process for importing and preprocessing**
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@@ -173,6 +173,7 @@ Import the file ignoring step 2.
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# Known issues:
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* The name of the countries added in a column are not being sanitized https://github.com/CartoDB/cartodb/issues/3392
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* Incorrect table usage for polygons and free text https://github.com/CartoDB/data-services/issues/173
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# Known deficiencies of the service
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* For the USA polygon zipcode service, Zipcode Tabulation Areas (ZCTA) are being used which [don't correspond to actual zipcode regions](http://web.archive.org/web/20050209030255/http://www.manifold.net/cases/zip_codes/zip_codes.html).
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