[LandXML] Re: LandXML vertical angle clarification
- From: "Nathan Crews" <nathan.crews@xxxxxxxxxxxx>
- To: <landxml@xxxxxxxxxxxxx>
- Date: Tue, 3 Jun 2003 15:16:14 -0400
Good morning, afternoon and evening,
There is a need to clarify vertical angle types in the LandXML schema. I
mistakenly defined some of them in the <Survey> definitions to be of type
'direction' which is not appropriate for vertical angles. We can change our
interpretation of this value informally in all LandXML-1.0 files and add the
new datatype to LandXML-1.1.
The proposal is to define all vertical angle measurements in LandXML as zenith
angles with the 0 origin as straight up and measured in a clockwise direction.
This new data type will be defined as
<xs:simpleType name="zenithAngle">
<xs:annotation>
<xs:documentation>Represents zenith angles with the 0 origin as straight
up and measured in a clockwise direction in the specified Angular
units.</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:double"/>
</xs:simpleType>
Specifically the following attributes would be intepreted this way until
LandXML-1.1 is ready with documentation:
<Survey>.<RawObservation>.zenithAngle from 'angle' to 'zenithAngle'
<Survey>.<ReducedObservation>.zenithAngle from 'angle' to 'zenithAngle'
Please let me know if the cause any concern or complications.
Regards,
Nathan Crews
www.landxml.org
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