[Therion] Revise command for previews

[Bruce]

> I cannot get preview/offsets to work for projected elevations, should

they, the thbooks seems to say any map!!

 

So yes, I checked a projected elevation.

Both offset and preview work OK, just like plan projections.

The difficulty I recalled may have been associated with 'map-level'.

 

 

In the diagram below, the shaded passage is 'preview below', and the outline
is 'offset 100m above'.

 



 

The definition is like this.

map AblutionInceptionElev020Map \

  -title "Greenlink System Elevation looking 020 deg" \

  -projection [elevation 020 deg]

   

   #in front

   JM-DigiPlusElev020 at MiddleEarth [000 100 m] above

   IK-LuckyCowboyElev020 at MiddleEarth [000 100 m] above 

   break

   JG-TrainElev020 at MiddleEarth

   .

   break 

   preview below IJ-CarpeDiemElev020 at MiddleEarth  

   .

endmap

 

and in the th-config the map is invoked directly with 

 

   select AblutionInceptionElev020Map

 

Hope that helps

Bruce

 

 

 

 

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