====== map_GetMipmapResStep ======

===== Description =====

Get the resolution step factor between successive mipmaps for a given map.

===== Function prototype =====

<code>long CExtAPI::map_GetMipmapResStep(ZMAP hMap);</code>

===== Arguments =====

^ Name ^ Type ^ Comment ^
| hMap | ZMAP | A handle to a map variable, the mipmap resolution step factor of which is to be retrieved. |

===== Return value =====

An integer greater than one if mipmaps have been initialised. Otherwise, zero is returned. 

===== Comments =====

As an example; if a value of 4 is returned by this function, it means that the first mipmap level that can be accessed by [[zeolite:functions:map_GetMipmapLevel]] is 4, the next is 16, after that is 64, and so on up to the maximum mipmap level given by [[zeolite:functions:map_GetMipmapMaxLevel]].