land:Spiral

An "infinite" spiral radius is denoted by the value "INF".

This conforms to XML Schema which defines infinity as "INF" or "-INF" for all numeric datatypes

Element information

Namespace: http://www.landxml.org/schema/LandXML-1.1

Schema document: external/landxml/1.1/LandXML-1.1.xsd

Type: Anonymous

Properties: Global, Qualified

Content

Sequence [1..1]
1. Choice [3..3]
  - land:Start Represents a 2D or 3D Starting or beginning PointDefined by either a coordinate text value ("north east" or "north east elev") or a CgPoint number reference "pntRef" attribute.
  - land:PI Represents a 2D or 3D Point of IntersectionDefined by either a coordinate text value ("north east" or "north east elev") or a CgPoint number reference "pntRef" attribute.
  - land:End Represents a 2D or 3D Ending PointDefined by either a coordinate text value ("north east" or "north east elev") or a CgPoint number reference "pntRef" attribute.
2. land:Feature [0..*] Used to include additional information that is not explicitly defined by the LandXML schema, Feature may contain one or more Property, DocFileRef or nested Feature elements. NOTE: to allow any valid content, the explicit definitions for Property, DocFileRef and Feature have been commented out, but are still expected in common use.Each Property element defines one piece of data.

Attributes

Name	Occ	Type
length	[1..1]	xsd:double
radiusEnd	[1..1]	xsd:double
radiusStart	[1..1]	xsd:double
rot	[1..1]	land:clockwise
spiType	[1..1]	land:spiralType
chord	[0..1]	xsd:double
constant	[0..1]	xsd:double
desc	[0..1]	xsd:string
dirEnd	[0..1]	land:direction
dirStart	[0..1]	land:direction
name	[0..1]	xsd:string
theta	[0..1]	land:angle
totalY	[0..1]	xsd:double
totalX	[0..1]	xsd:double
staStart	[0..1]	xsd:double
state	[0..1]	land:stateType
tanLong	[0..1]	xsd:double
tanShort	[0..1]	xsd:double
oID	[0..1]	xsd:string

Used in

Anonymous type of element ConnSpiral
Anonymous type of element InSpiral
Anonymous type of element OutSpiral
Anonymous type of element land:CoordGeom

Sample instance

<land:Spiral length="1.0" radiusEnd="1.0" radiusStart="1.0" rot="cw" spiType="biquadratic">
   <land:Start>Any text, intermingled with:1.0 1.0</land:Start>
   <land:Feature>
      <!--any element-->
   </land:Feature>
</land:Spiral>