"t line" and only t line

[Ben Burford <benb@xxxxxxxxxxxx>]

Hello Lasers,

I have time series (station) data at a point.  Some of this data is at multi
ple levels (measured at 2, 10, 20 and 40 meter heights on a tower).  I'm hap
py with my menus for the data that is not on levels, the "Select view" menu 
shows "t line" as the only choice.  But for the data that has the height sel
ection my "Select view" menu shows 3 choices ("t line", "z line" and "zt (de
pth/time) slice").  Also, for the "Select Depth" menu it allows the user to 
choose a range. 

For the data that has heights I want the user to only be able to select a si
ngle height (e.g. 20 meters) and not a range, and for the "Select view" menu
 I want it to show "t line" as the only choice.  How can I do this?

My xml structure is:

(Insitu_Datasets.xml)

<category name="Insitu">
  <category name="Surface">
    <category name="Mongolia">
      <category name="BTS">
        <filter action="apply-dataset" equals="CEOP Surface Mongolia BTS"/>
      </category>
    </category>
  </category>

  <category name="Tower">
    <category name="ARM_NSA">
      <category name="C1">
        <filter action="apply-dataset" equals="CEOP Tower NSA C1"/>
      </category>
    </category>
  </category>
</category>


Where BTS doesn't have levels, but C1 does.  Part of the xml for C1 is:

<axes>
 <NSA_BTS_X units="degree_east" type="x">
  <arange start="191.143" step="1" size="1"/>
 </NSA_BTS_X>
 <NSA_BTS_Y units="degree_north" type="y">
  <arange start="53.8433" step="1" size="1"/>
 </NSA_BTS_Y>
 <NSA_BTS_Z units="Meters" type="z">
  <v>2</v>
  <v>10</v> 
  <v>20</v>
  <v>40</v>
 </NSA_BTS_Z>
 <NSA_BTS_T units="hours" type="t">
  <arange start="2002-Oct-01 01:00:00" step="1" size="48"/>
 </NSA_BTS_T>
</axes>

Do I need a different structure for z to force it to allow selecting only a 
single choice for height (rather than choosing a range of heights)?


In ui.xml I see:
	<menu type="views" name="Views_StdVec">
And 
	<menu type="views" name="Views_Std">

How does LAS determine which one to use?  Perhaps I could create something l
ike:

	<menu type="views" name="Views_Tower">
	    <ifitem view="t" values="t">t line</ifitem>
	</menu>

Where the only option is "t line".  But how do I get LAS to use the <menu ty
pe="views" name="Views_Tower"> version?

Thank you,

Ben