EDIGéO Reader

Licensing options for this format begin with FME Desktop Professional Edition.

The EDIGéO Reader allows FME to read files in the EDIGéO (Electronic Data Interchange in the field of Geographic Information) format established by the French standards association (AFNOR).

This chapter assumes familiarity with this format.

Overview

EDIGéO is a standardized format commonly used in France for the exchange of geographical information.

Reader Overview

The top-level data structure for an EDIGéO dataset is the exchange. An exchange appears as a single .THF file. This file does not hold the main data; instead it specifies which lots belong to the exchange. An exchange, therefore, consists of one or more lots.

A lot in EDIGéO is conceptually a dataset. Within a lot, all data is self-contained. Therefore, opening an exchange file with multiple lots is conceptually identical to opening several exchange files each having one lot.

An EDIGéO lot is described in several plain text files. These files are listed below:

Extension	Cardinality (per lot)	Description
.GEN	one	General information
.GEO	one	Geographical information
.QAL	zero or one	.QAL files hold quality information. Quality data may describe information about the source of the data, or its up-to-dateness.
.DIC	zero or one	.DIC files hold nomenclature data, such that EDIGéO objects, attributes, and relationship entities can be matched with a standardized nomenclature scheme.
.SCD	zero or one	.SCD files holds schema information. This file holds conceptual model information for attributes, relationships, and topological data entities. (This information is used to generate feature types in FME.)
.VEC	one to N	.VEC files holds vector data. Each .VEC file describes an EDIGéO subset. Multiple subsets can share the same schema, quality, and nomenclature data. Data in .VEC files comes in five forms: node, edge, face, link, and feature primitives. These primitives form the building blocks for the topological features.