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Re: reading shapefiles & IDL objects [message #78842 is a reply to message #78778] Wed, 21 December 2011 13:27 Go to previous messageGo to previous message
desertdryad is currently offline  desertdryad
Messages: 39
Registered: August 2011
Member
On Dec 21, 2:16 pm, desertdryad <dry...@gmail.com> wrote:
>> The simplest way is just to march through the entities
>> and keep track of the entities's bounds. This is how
>> cgDrawShapes works, when you set the AutoDraw keyword.
>
>>        FOR j=0,N_Elements(*entities)-1 DO BEGIN
>>           thisEntity = (*entities)[j]
>>           entityMinX[j] =  thisEntity.bounds[0]
>>           entityMaxX[j] =  thisEntity.bounds[4]
>>           entityMiny[j] =  thisEntity.bounds[1]
>>           entityMaxY[j] =  thisEntity.bounds[5]
>>        ENDFOR
>>        xrange = [Min(entityMinX), Max(entityMaxX)]
>>        yrange = [Min(entityMinY), Max(entityMaxY)]
>>        cgPlot, xrange, yrange, ....
>
>> Cheers,
>
>> David
>
> I think I get that.  Thanks, David!!

PS - all the pieces are in the same directory.. I know GIS better than
I know IDL :)

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