min_max_range.earth

<!-- 
Demonstrates the "min_range" and "max_range" properties.

As you zoom in, you will see the aerial imagery transition into
a street map. Zoom in further and see it transition back to aerial.

TIP: set your OSG_NUM_HTTP_DATABASE_THREADS to 4 or more!
-->

<map name="MapQuest Open Aerial" type="geocentric" version="2">
 
    <image name="mapquest_open_aerial" driver="xyz">
        <url>http://oatile[1234].mqcdn.com/naip/{z}/{x}/{y}.jpg</url>
        <profile>spherical-mercator</profile>
    </image>
    
    <image name="mapquest_osm" driver="xyz" max_range="5e6" min_range="1e6">
        <url>http://otile[1234].mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg</url>
        <profile>global-mercator</profile>
    </image>
    
    <options>
        <lighting>false</lighting>
        <cache_policy usage="no_cache"/>
        <terrain>
            <min_tile_range_factor>9</min_tile_range_factor>
        </terrain>
    </options>
    
</map>