Shape_length and Shape_Area

Discussion created by sylvain.kerdreux on Jun 3, 2010
Latest reply on Jul 19, 2010 by smalgin-esristaff
Using Json to get back layer's description I do not have shape_length or shape_area :

However if I did a query on this layer :*&f=html

I have two "hidden" fields :
Shape_Length: 34.5280654146724
Shape_Area: 45.1343021062329

so is there any other field which are not present in layer's description but present in a query layer ?