Danish DSFL Feature Representation

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).

DSFL features consist of geometry and attributes. When reading-in a feature, the DSFL reader holds a set of currently active DSFL data fields. These active data fields are controlled by definitions of the %D token, found in the DSFL input file. The active data fields are given as attributes to the feature being read. The active set of data fields may be empty. In this case, the feature has no DSFL data fields attributes. The name for these attributes are of the form Dx, where x is a positive integer.

If the feature references any of the accuracy and origin definitions processed at the beginning of the file, these definitions will also become attributes for the referencing feature.

All DSFL features contain a dsfl_type attribute that identifies the geometric type. Depending on the geometric type, the features may contain additional attributes that are specific to them.

Attribute Name	Contents
dsfl_type	The DSFL geometric type of this feature. Range: dsfl_point dsfl_line dsfl_polygon dsfl_text dsfl_aggregate dsfl_none dsfl_header dsfl_origin Default: No default

General Attributes

Attributes specific to each dsfl_type are described below. All DSFL features, except those features having dsfl_text and dsfl_header as the value of their dsfl_type, may contain the following attributes:

Attribute Name	Contents
dsfl_class	This is the DSFL feature code class.
dsfl_subclass	This is the DSFL feature code subclass.
dsfl_origin_ND1	Acronyms for production, also known as data generation, method Range: DU | DF | DL | SK | SL | UU | FF | LL Default: No default
dsfl_origin_ND11	Standard deviation for plane coordinates, in metres with decimals. Default: No default
dsfl_origin_ND12	Standard deviation for height coordinate, in metres with decimals Default: No default
dsfl_origin_ND21	Date of base map generation Range:yymmdd Default: No default
dsfl_origin_ND22	Date of land surveying Range: yymmdd Default: No default
dsfl_origin_ND23	Date for photo flight Range: yymmdd Default:No default
dsfl_origin_ND32	Scale of photogrammetric photos Default: No default
dsfl_origin_ND41	Producer of digital data Range: String, maximum 40 characters Default: No default
dsfl_origin_ND51 to dsfl_origin_ND59	Descriptive text Range: String, maximum 40 characters Default: No default

Points

dsfl_type: dsfl_point

DSFL point features specify a single x and y coordinate for two-dimensional (2D) data or a single x, y, and z coordinate for three-dimensional (3D) data. Point features may have the following additional special attributes associated with them.

Attribute Name	Contents
dsfl_point_rotation	DSFL angles are defined as grades. The DSFL reader automatically converts these into degrees. The degrees are measured counterclockwise from horizontal. Range: 0.0 .. 360.0 Default: 0.0
Z	When the DSFL data is 3D, the dsfl_point will contain this attribute having as its value the third, or z, coordinate of the point.

Lines

dsfl_type: dsfl_line

DSFL line features specify linear features by a sequence of x and y coordinates for 2D data or by a sequence of x, y, and z coordinates for 3D data.

Polygons

dsfl_type: dsfl_polygon

DSFL polygon features specify polygon features by a sequence of x and y coordinates for 2D data or by a sequence of x, y, and z coordinates for 3D data. The first and last coordinates of the polygon are equal.

Text

dsfl_type: dsfl_text

DSFL text features are used to specify annotation information. Each text feature has a single x and y coordinate for 2D data or a single x, y, and z coordinate for 3D data. The following table lists the special FME attribute names for the DSFL text feature.

Attribute Name	Contents
dsfl_text_code	The DSFL data field code.
dsfl_text_value	The value for the DSFL data field.
dsfl_rotation	DSFL angles are defined as grades. The DSFL reader automatically converts these into degrees measured counterclockwise from horizontal. Range: 0.0 .. 360.0 Default: 0.0
dsfl_text_justification	Indicates the position of the text coordinate in relation to the text. Range: dsfl_top_left | dsfl_top_center | dsfl_top_right | dsfl_middle_left | dsfl_middle_center | dsfl_middle_right | dsfl_bottom_left | dsfl_bottom_center | dsfl_bottom_right Default: No default

Aggregate

dsfl_type: dsfl_aggregate

DSFL aggregates are a collection of dsfl_line or dsfl_polygon features.

The geometry of the dsfl_aggregate feature is homogeneous. The dsfl_type attribute of this feature will be set to dsfl_polygon if all composing features are polygons. If all composing features are lines, it will be set to dsfl_line.

None

dsfl_type: dsfl_none

This is a DSFL feature with no geographic representation.

Header

dsfl_type: dsfl_header

This DSFL feature contains the metadata stored in the header section for the input DSFL file. The feature contains no geometry.

The following table lists the attributes that this feature contains. In essence, all header tokens with their values become attributes for this feature.

Attribute Name	Contents
H0	Character string specifying the three special Danish characters in upper- and lowercase.
H1	Plane coordinate system—this value is used to set the coordinate system on the features Range: S34J | S34S | S45B | U32 | U33 | U32W | U33W | LOK
H2	Acronym for the height coordinate system Range: DNNGI
H3	Coordinate sequence Range: XY | XYZ | YX | YXZ | NE | NEH
H9	Specific value for “no available height” Range: Real
H11	Supplier’s company name Range: String
H12	Supplier’s address Range: String
H13	Supplier’s postal code Range: String
H14	Supplier’s postal district Range: String
H15	Supplier’s phone number Range: String
H16	Supplier’s fax number Range: String
H41	Date and time of generation for the data set Range: yymmdd hhmm
H58	Data content Range: Basis-udgave 970901 for the DSFL basic format
H59	Version date of DSFL format Range: yymmdd