Licensing options for this format begin with FME Professional Edition.
Overview
FME provides read and write access to CartoDB databases. CartoDB databases may contain tables. FME treats these tables as feature types, and can read features from them, as well as write features to them. FME treats each column in a table as an attribute, and each row as a feature.
CartoDB is a Software as a Service (SaaS) cloud computing platform that provides GIS and web mapping tools for display in a web browser. CartoDB is open source, so users can either make use of the CartoDB web platform, or they can deploy their own instance of the software.
CartoDB is based on PostgreSQL and PostGIS as an underlying database.
More information about the CartoDB can be found at www.cartodb.com.
Format Usage Notes
- At the time of writing, CartoDB does not fully support the creation of tables through their SQL API. However, there exists a workaround, which is described in the Writer Overview below.
- The CartoDB reader and writer do not expose the integer primary key column (cartodb_id) for CartoDB tables as an attribute.
- Reader: When getting the list of tables in a CartoDB account, some “ghost” tables may be included. These “ghost” tables are tables that do not show up in the CartoDB tables dashboard. They can be read to and written from, just as any other table, but doing so will not cause them to appear in the tables dashboard.
- Writer: CartoDB does not distinguish between line and multiple line geometries, nor does it distinguish between polygon and multiple polygon geometries. To improve consistency, FME will promote lines to multilines and polygons to multipolygons before writing to a CartoDB table.
Reader Overview
The CartoDB reader supports reading multiple tables from the same CartoDB account. Because of this, a separate reader must be created for each CartoDB account.
The tables must be defined in the workspace before they can be read.
Writer Overview
The CartoDB writer module stores attribute records into a Table associated with a CartoDB account. It provides the following capabilities:
Table Creation
The CartoDB writer uses the information within the FME workspace to automatically create CartoDB Tables as required. All tables will be created when the first input feature is processed. If no features are sent to a feature type, then the corresponding table will not be created.
Notes:
- CartoDB may take several minutes to register tables that have been newly created by FME.
- To create tables in a CartoDB Multiuser Enterprise account, a valid username must be entered in the Writer Parameters.
Table Overwrite
If the Table Handling Format Parameter for a feature type is set to Drop and Create, then the writer will drop and re-create the table before writing any features to it.
Tables will be overwritten when the first input feature is processed. If no features are sent to a feature type, then the corresponding table will not be overwritten.