Update 'VRAPoten-API.md'

VRAPoten-API.md

@@ -74,6 +74,20 @@ Response 401 Not authenticated
 Response 403 No WRITE permissions in item  
 Response 404 Item not found  
 
+
+##### Optional input parameters #####
+There are some optional task attribute input parameters for greater flexibility.
+
+* **countPerArea**  
+Allows you to specify if spacing in cm needs to be calculated to count per area in m2.
+
+default is false
+
+```javascript
+{
+    "countPerArea": true,
+}
+
 ###### Create taskmap
 [Create Taskmap](Create-Taskmap.md)