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Table

loaders.gl defines a number of table types.

  • ObjectRowTable
  • ArrayRowTable
  • GeoJSONTable
  • ColumnarTable
  • ArrowTable

These all have a shape field on the top level.

(If you are an advanced TypeScript programmer, you will appreciate that this lets typescript treat table types as a "discriminated union", meaning that once the type has been checked in an if or switch statement, the typing of the table is implied).

Table Schemas​

Each table has an optional schema field. If it is present, it contains a list of fields (name, type and metadata for each field), as well as metadata for the table itself.

There are also utilities for deducing schemas.

Table Utilities​

A set of utilities are provided to work with tables independently of which of the supported representations they are in.

  • `tableLength``
  • ...