<?xml version="1.0" encoding="UTF-8"?>
<customMapSource>
    <name>USGSImageryOnly</name>
    <minZoom>0</minZoom>
    <maxZoom>15</maxZoom>
    <tileType>png</tileType>
    <tileUpdate>None</tileUpdate>
    <url>https://basemap.nationalmap.gov/ArcGIS/rest/services/USGSImageryOnly/MapServer/tile/{$z}/{$y}/{$x}</url>
    <backgroundColor>#000000</backgroundColor>
</customMapSource>