Write Alignment to LandXML File

This option will write a Road/Drain/Sewer Alignment (Longsection) to a LandXML file using the special Alignment data format.

Note that the LandXML Alignment data format only allows the Longsection data to be written to the file.

Output File
Choose a suitable name so you can identify it later, include the road name and the word alignment.

Section
Choose a longsection from the list presented, it will list all Road, Drain and Sewer Longsections in the job.

Design or natural Surface Levels
If the road has a design surface you should write out the Design Surface levels.

Machine Guidance Files

Two files required for machine guidance.
1. The Alignment (longsection) file
2. The Surface File

You must prepare your job data carefully and then generate each of these files separately.
This option (above) is used to generate the Alignment file.
The Write Surface to LandXML File option should be used to generate the Surface file

Preparing Job for Alignment File

Create a Road String, longsections and cross sections
Add IPs, vertical curves to create a vertical design
Add CS design templates to create a design surface

Alignment File Format

This is a standard XML file format, with data format defined by the LandXML standard.
This is a sample of some Alignment file data


  <Alignments>
    <Alignment name="R3L" staStart="4.805329" length="34.841115">
      <CoordGeom>
        <Line staStart="4.805329">
          <Start>58.166362 96.336988</Start>
          <End>58.109736 96.523242</End>
        </Line>
        <Line staStart="5">
          <Start>58.109736 96.523242</Start>
          <End>56.655326 101.307036</End>
        </Line>
      </CoordGeom>
      <Profile>
        <ProfAlign name="Vertical Geometry">
          <PVI>4.805329 100.099543</PVI>
          <PVI>5 100.098755</PVI>
          <PVI>39.646444 99.953351</PVI>
        </ProfAlign>
      </Profile>
    </Alignment>
 
   <Feature code="RR Stringline Layers">
      <Feature code="RR Stringline Layer">
        R3L,R3End,R3,R3R
        <Property label="name" value="Road 3"/>
        <Property label="centreline" value="R3"/>
      </Feature>
    </Feature>
  </Alignments>

Explanation

<Alignments> - indicates the start of Alignments section, we only have one alignment in a file
<Alignment name="R3L" staStart="4.805329" length="34.841115">
name is the name of the longsection string;
staStart is the Start chainage for the alignment
length is the length of the longsection string;
<CoordGeom> - This is the start of the geometry (XY/NE) definition of the alignment
<Line staStart="4.805329"> - Defines a line, staStart is the start chainage
<Start>58.166362 96.336988</Start> - The start co-ords (Northing,Easting) of the line
<End>58.109736 96.523242</End> - The end co-ords (Northing,Easting) of the line
Multiple line segments will appear one after the other, curves are allowed
</CoordGeom> - end of the geom (XY/NE) definition
<Profile> - start of the vertical info
<ProfAlign name="Vertical Geometry"> - start of vertical info
<PVI>4.805329 100.099543</PVI> - Chainage, RL(Z) value. Repeated for each point on the alignment
</ProfAlign> - end of profile
</Profile> - end of profiles
</Alignment> - end of aligment definition