Lines

ff_type: ff_lines

FF line features represent linear features that may be either 2D or 3D. FF documentation often refers to these linear features as polygons. These features may have supplementary anchor, or text, points defined in their attributes. FF line features may have the following special attributes associated with them.

Attribute Name

Description

xyfel

The standard error in planimetry (X and Y)

Range: Any real number

zfel

The standard error in height (Z)

Range: Any real number

lagestat

The position status. The value must be one of the following:

0 = reliable position

1 = uncertain position

2 = planned position

Range: Integer

ff_geo_area_status

This gives the position of the feature relative to a geographic area.

The concept geographic area in a GdB has different meanings, depending on the type of operation to be carried out in the bank. It is a unit used for organizing data in the bank. The signal is set when checking out from a GdB.

The attribute may have one of the following values:

0 = inside

1 = on edges

2 = outside

linjeanp

The line adaptation of plotting style when viewed in AutoKa.

0 = adaptation of plotting style per segment

1 = adaptation of plotting style along the whole polygon

2 to 9 = reserved

10 to 300 = Adaptation to arcs during plotting: 100 is the standard value. However, lower values result in better adaptation to the original polygon, whereas higher values result in rounder shapes.

Range: Integer

ff_text_point{}.X
ff_text_point{}.Y

If this feature has a supplementary anchor point or text point, this is its location.

Range: Integer

ff_text_point{}.
rotation

If this feature has a supplementary anchor point or text point, this is its rotation.

Range: Integer

ff_text_point{}.
text_height

If this feature has a supplementary anchor point or text point, when reading if thojd > 0, this attribute is set to the height of the text point in 1/100mm.

Range: Integer

ff_text_point{}.
text_height_code

If this feature has a supplementary anchor point or text point, when reading if thojd < 0, this attribute is set to the height code of the text point.

Range: Integer

mtyp_par1
mtyp_par2
mtyp_par3
ff_source_field1_2
ff_source_field2_2
ff_source_field3_2

This feature may have up to two sources. These attributes hold the raw values of the three parameter fields for each of the two sources.

Range: Integer

ff_source_type_1
ff_source_type_2

This feature may have up to two sources. These attributes hold the type of each source, as follows:

0 = planimetry

1 = height

Range: Integer

koordsys
ff_source_coordsys_2

This feature may have up to two sources. These attributes hold the coordinate system of each source, as follows:

0 = changed when checking into GdB

empty value = will not be changed when checking into GdB

fnr = creation number for coordinate system

Range: Integer

m_typ
ff_source_method_2

This feature may have up to two sources. These attributes hold the source method of each source:

0 = unspecified

1 = field survey

2 = photogrammetry

3 = digitising

4 = pointing together

Range: Integer

ff_measurement_type_1
ff_measurement_type_2

This feature may have up to two sources. These attributes hold the measurement type of each source.

If the source method = field survey

0 = unspecified

1 = control network

2 = orthogonal/polar detail surveys

If the source method = photogrammetry

0 = unspecified.

1 = block triangulation

2 = stereo plotting

Range: Integer

ff_technique_1
ff_technique_2

This feature may have up to two sources. These attributes hold the technique of each source.

If the source method = field survey

0 = other technique

1 = conventional (if source type = 0)

1 = levelling (if source type = 1)

2 = GPS (if measurement type = 1 and source type = 0)

2 = ISS (Inertial Survey Systems) (if measurement type = 2 and source type = 0)

2 = trig. (heighting) (if source type = 1)

3 = ISS (if measurement type = 2 and source type = 1)

If the source method = photogrammetry

0 = unspecified

1 = analogue

2 = analytical

If the source method = digitising

0 = unspecified.

1 = table digitising

2 = screen digitising

3 = scanning

Range: Integer

ff_flight_altitude_1
ff_flight_altitude_2

This feature may have up to two sources. These attributes hold the flight altitude of each source.

If the source method = photogrammetry, this attribute holds the altitude in metres.

Range: Integer

ff_manuscript_1
ff_manuscript_2

This feature may have up to two sources. These attributes hold the manuscript of each source.

If the source method = digitising, the following is the case:

0 = unspecified

1 = older survey

2 = modern survey

3 = photogrammetry

4 = orthophoto

Range: Integer

ff_manuscript_scale_1
ff_manuscript_scale_2

This feature may have up to two sources. These attributes hold the manuscript scale of each source if the source method = digitising.

Range: Integer

aktdatum

This is the up-to-dateness date. This is a character string in the form:

2001-11-25, 21:14

Range: Character string

aktsign

This is the up-to-dateness signature.

Range: Character string to a maximum of 8 characters

ff_circle_radius

 

Applicable only with classic geometry.

If this feature represents a circle, the radius is stored in this attribute.

Range: Any real number

ff_arc_bulges

 

Applicable only with classic geometry.

If this is a linear feature with line bulges, they may be removed from the coordinates and replaced by multiple edges. This attribute may be present and hold information necessary to recreate line bulges where they have been vectorized on reading.

Range: Comma-Separated Value character string

ff_geo_link

If this feature is linked to a point, this attribute will be present.

Range: Yes

ff_geo_pointer_
breakpoint{}

This list attribute indicates to which coordinate or breakpoint the geo-link belongs.

Range: Integer

ff_geo_ptr{}

This list attribute holds the creation number of the polygon to which it is geo-linked.

Range: Integer

ff_up_poly_link

If this feature is a part of the boundary of a polygon area, this attribute will be present.

Range: Yes

ff_up_right_area

If this feature is part of a boundary of a polygon area, this attribute holds a list of the creation numbers of the polygons on its right. This will be a single number for proper coverages.

Range: Integer

ff_up_left_area

If this feature is part of a boundary of a polygon area, this attribute holds a list of the creation numbers of the polygons on its left. This will be a single number for proper coverages.

Range: Integer

ff_up_from_hole

If this feature is a part of the boundary of a hole within a polygon area, this attribute holds the creation number of the polygon surrounding the hole.

Range: Integer

ff_up_cluster

If this feature is linked to a cluster, this attribute will be present.

Range: Integer

ff_up_cluster_link

If this feature is linked to a cluster, this attribute will contain the creation number of the parent cluster feature.

Range: Integer

ff_up_parent_link

If this feature a member of a group, this attribute will be present.

Range: Yes

ff_up_parent

 

If this feature is a member of a group, this attribute will contain the creation number of the parent group feature.

Range: Integer