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 driver="gdal" name="world-tiff" cache_enabled="false">
        <url>../data/world.tif</url>
        <cache_policy usage="no_cache"/>
    </image>
    
    <image name="readymap_imagery" driver="tms" max_range="1e7" min_range="1e6">
        <url>http://readymap.org/readymap/tiles/1.0.0/7/</url>
    </image>
    
    <options>
        <terrain attenuation_distance="6000000"/>
    </options>
    
</map>