[LandXML] Re: Direction units

Hopefully this modified documentation clears up any confusion between angles
and directions in LandXML:

 

Angle - a simple angular value, such as the delta angle for a circular
curve. Also the angle measured between two directions.

 

Direction - a horizontal angle that indicates a direction, such as a bearing
or azimuth.

 

 

<xs:element name="Units">

   <xs:annotation>

    <xs:documentation>All angular and direction values default to radians
unless otherwise noted. Angular values, expressed in the specified
<Units>.angleUnit are measured counter-clockwise from east=0. Horizontal
directions, expressed in the specified <Units>.directionUnit are measured
counter-clockwise from 0 degrees = north</xs:documentation> ...

 


<xs:simpleType name="angle">
    <xs:annotation>
        <xs:documentation>Represents a normalized angular value in the
specified Angular units. Assume 0 degrees = east</xs:documentation>
    </xs:annotation>


<xs:simpleType name="direction">
    <xs:annotation>
        <xs:documentation>Represents a normalized angular value that
indicates a horizontal direction, expressed in the specified Direction
units. Assume 0 degrees = north</xs:documentation>
        </xs:annotation>


Regards,

Nathan Crews
w <http://www.landxml.org> ww.landxml.org


  _____  

From: landxml-bounce@xxxxxxxxxxxxx [mailto:landxml-bounce@xxxxxxxxxxxxx] On
Behalf Of Janne Porkka
Sent: Tuesday, September 13, 2005 6:32 AM
To: landxml@xxxxxxxxxxxxx
Subject: [LandXML] Direction units



Dear all,

 

We have remarked overlapping descriptions on angular & direction definitions
in LandXML1.0 and 1.1. Please upgrade these verbal descriptions.

    

 

east=0

 

<xs:element name="Units">

   <xs:annotation>

    <xs:documentation>All angular and direction values default to radians
unless otherwise noted. Direction values are measured counter-clockwise from
east=0.</xs:documentation> ...

 

 

north=0

 

<xs:simpleType name="direction">

   <xs:annotation>

     <xs:documentation>Represents a normalized angular value that indicates
a horizontal direction, expressed in the specified Direction units. Assume 0
degrees =  north</xs:documentation> ......

 

 

 

Best Regards,

 

-----------------------------------------------------------

 

Janne Porkka 

Research Scientist

VTT BUILDING AND TRANSPORT

Business and Process Management

Lämpömiehenkuja 2

P.O.Box 1800

FIN-02044 VTT, Finland

Email: Janne.Porkka@xxxxxx 

Phone: +358 20 722 6203

Mobile: +358 40 578 6055

Fax: +358 20 722 6251

  

 

 

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