-$extra_columns[]=array('tagname'=>'asn', 'header'=>'AS', 'source'=>'tophat', 'type'=>'string', 'title'=>'AS Number', 'fetched'=>false);
-$extra_columns[]=array('tagname'=>'city', 'header'=>'LCY', 'source'=>'tophat', 'type'=>'string', 'title'=>'City', 'fetched'=>false);
-$extra_columns[]=array('tagname'=>'region', 'header'=>'LRN', 'source'=>'tophat', 'type'=>'string', 'title'=>'Region', 'fetched'=>false);
-$extra_columns[]=array('tagname'=>'country', 'header'=>'LCN', 'source'=>'tophat', 'type'=>'string', 'title'=>'Country', 'fetched'=>false);
-$extra_columns[]=array('tagname'=>'continent', 'header'=>'LCT', 'source'=>'tophat', 'type'=>'string', 'title'=>'Continent', 'fetched'=>false);
-$extra_columns[]=array('tagname'=>'hopcount', 'header'=>'HC', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Hop count from reference node', 'fetched'=>false);
-//$extra_columns[]=array('tagname'=>'rtt', 'header'=>'RTT', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Round trip time from reference node', 'fetched'=>false);
-//$extra_columns[]=array('tagname'=>'agents', 'header'=>'MA', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located measurement agents', 'fetched'=>true);
-//$extra_columns[]=array('tagname'=>'agents_sonoma', 'header'=>'MAS', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located SONoMA agents', 'fetched'=>true);
-//$extra_columns[]=array('tagname'=>'agents_etomic', 'header'=>'MAE', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located ETOMIC agents', 'fetched'=>true);
-//$extra_columns[]=array('tagname'=>'agents_tdmi', 'header'=>'MAT', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located TDMI agents', 'fetched'=>true);
-//$extra_columns[]=array('tagname'=>'agents_dimes', 'header'=>'MAD', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located DIMES agents', 'fetched'=>true);
+//NOTE: Uncomment these lines if TopHat provides information for your nodes
+//$extra_columns[]=array('tagname'=>'asn', 'header'=>'AS', 'source'=>'tophat', 'type'=>'string', 'title'=>'AS Number', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'city', 'header'=>'LCY', 'source'=>'tophat', 'type'=>'string', 'title'=>'City', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'region', 'header'=>'LRN', 'source'=>'tophat', 'type'=>'string', 'title'=>'Region', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'country', 'header'=>'LCN', 'source'=>'tophat', 'type'=>'string', 'title'=>'Country', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'continent', 'header'=>'LCT', 'source'=>'tophat', 'type'=>'string', 'title'=>'Continent', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'hopcount', 'header'=>'HC', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Hop count from reference node', 'fetched'=>false);
+////$extra_columns[]=array('tagname'=>'rtt', 'header'=>'RTT', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Round trip time from reference node', 'fetched'=>false);
+////$extra_columns[]=array('tagname'=>'agents', 'header'=>'MA', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located measurement agents', 'fetched'=>true);
+////$extra_columns[]=array('tagname'=>'agents_sonoma', 'header'=>'MAS', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located SONoMA agents', 'fetched'=>true);
+////$extra_columns[]=array('tagname'=>'agents_etomic', 'header'=>'MAE', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located ETOMIC agents', 'fetched'=>true);
+////$extra_columns[]=array('tagname'=>'agents_tdmi', 'header'=>'MAT', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located TDMI agents', 'fetched'=>true);
+////$extra_columns[]=array('tagname'=>'agents_dimes', 'header'=>'MAD', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Co-located DIMES agents', 'fetched'=>true);