GML
The Geography Markup Language (GML) is the XML grammar defined by the Open Geospatial Consortium (OGC) . It allows for the transmission of the digsite polygon as a spatial object rather than as a picture.
California Example Nevada Example
<?xml version="1.0" encoding="utf-8"?>
<gml:FeatureCollection xmlns:gml="http://www.opengis.net/gml"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:onecallgml="http://www.pelicancorp.com/onecallgml"
xsi:schemaLocation="http://www.pelicancorp.com/onecallgml http://www.pelicancorp.com/digsafe/onecallgml.xsd">
<gml:featureMember>
<onecallgml:OneCallReferral gml:id="digsite">
<onecallgml:LocationDetails>
<surfaceProperty xmlns="http://www.opengis.net/gml">
<Polygon srsName="EPSG:4326">
<exterior>
<LinearRing>
<posList>
-119.681818572409 36.8177109047475 -119.680681303184 36.8174532364565 -119.680981713923 36.8168605960953 -119.681657638085 36.8168004729037 -119.682419393886 36.8173158130133 -119.681818572409 36.8177109047475</posList>
</LinearRing>
</exterior>
</Polygon>
</surfaceProperty>
</onecallgml:LocationDetails>
</onecallgml:OneCallReferral>
</gml:featureMember>
</gml:FeatureCollection>