| 
 | 
| Name | IndexMap | 
|---|---|
| Type | gml:IndexMapType | 
| Nillable | no | 
| Abstract | no | 
 
            
         'If absent, the implied value is \"Linear\".'
'Index position of the first grid post, which must lie somwhere in the GridEnvelope. If absent, the startPoint is equal to the value of gridEnvelope::low from the grid definition.'
