Merge grids with Avenue

Summary

The script in this article uses the Mosaic request to merge two or more grids into one grid theme. This code and data type require the Spatial Analysis extension.

Procedure

1. Open a new script window.
   
   
   A. Activate the Project window.
   B. Click the Scripts icon.
   C. Click New.
   
   
2. Copy the following code into the script window:
   
   

   Code:
   '-- Script: Grid_mosaic.ave
   
   v = av.getactivedoc
   gthemes = v.getthemes
   gthms = list.make
   
   for each t in gthemes
     if (t.is(gtheme)) then
       gthms.add(t)
     else
       continue
     end
   end
   
   if (v.getactivethemes.count < 1) then
      msgbox.info("Active theme must be a Grid theme","")
      exit
   end
    
   g1 = v.getactivethemes.get(0)
   if (g1.is(gtheme).not) then
      msgbox.info("Active theme must be a Grid theme","")
      exit
   end
   
   gthms2 = gthms-{g1}
   mrglist = msgbox.multilist(gthms2,
            "Pick grid(s) to mosaic with"++g1.getname,
            "Create Grid Mosaic")
   if (mrglist= nil) then exit end
   thegridlist = list.make
   
   for each gt in mrglist
     gr = gt.getgrid
     thegridlist.add(gr)
   end
   
   outgrid = g1.getgrid.mosaic(thegridlist)
   newtheme = gtheme.make(outgrid)
   v.addtheme(newtheme)
   v.invalidate
   

   
   
3. Click the
   
   button to compile the script.
4. Make the view active.
5. Click the
   
   button to run the script.