Features read from Informix Spatial consist of a series of attribute values and geometry. The feature type of each feature is defined in its Feature Type parameters.
Features written to the database have the destination table as their feature type, and attributes as defined in the Feature Type parameters dialog.
In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Attributes), the IBM Informix Spatial module adds the format-specific attributes described below:
|
Attribute Name |
Contents |
|---|---|
|
infx_type |
The type of geometric entity stored within the feature. The valid values for the object model are listed below: infx_null infx_point infx_linestring infx_polygon infx_geometry |
Features read from, or written to, Informix Spatial also have an attribute for each column in the database table. The feature attribute name will be the same as the source or destination column name. The attribute and column names are not case-sensitive.
No Coordinates
infx_type: infx_null
Features with no coordinates are tagged with this value when reading from or writing to Informix Spatial.
Points
infx_type: infx_point
All Informix Spatial point and multipoint features are read as infx_point. The only difference being the geometry type of feature, which will be set to fme_aggregate if it is a multipoint and fme_point if it is a point.
Lines
infx_type: infx_line
All Informix Spatial linestring and multilinestring features are read as infx_line. The only difference is the geometry type of feature, which will be set to fme_aggregate if it is a multilinestring and fme_line if it is a linestring.
Polygons
infx_type: infx_polygon
All Informix Spatial polygon and multipolygon features are read as infx_polygon. The only difference is the geometry type of feature, which will be set to fme_aggregate if it is a multipolygon and fme_polygon if it is a polygon. Polygon features include donut polygons with one or more holes.
The following table summarizes all of the infx_type values that are possible with Informix Spatial geometry, and provides a description of each representation.
|
infx_type |
Informix Spatial type |
Representation |
|---|---|---|
|
infx_null |
Not applicable |
No geometry |
|
infx_point |
POINT |
Single point geometry. fme_geometry = fme_point fme_type = fme_point |
|
MULTIPOINT |
Aggregate containing one or more points. fme_geometry = fme_aggregate fme_type = fme_point |
|
|
infx_line |
LINESTRING |
Single line geometry. fme_geometry = fme_line fme_type = fme_line |
|
MULTILINESTRING |
An aggregate of linestrings. fme_geometry = fme_aggregate fme_type = fme_line |
|
|
infx_polygon |
POLYGON |
A single polygon or donut geometry. fme_geometry = fme_polygon or fme_donut fme_type = fme_polygon |
|
|
MULTIPOLYGON |
An aggregate of simple polygons or donut polygons. fme_geometry = fme_aggregate fme_type = fme_polygon |
|
infx_geometry |
GEOMETRY |
An arbitrary geometry. |