We find identically duplicated map markers so that they can be removed with a text editor. github 
We read the markup from the first map on the page. Lines that begin with a digit are considered markers.
Duplicated lines are listed within the Frame with line numbers attached.
Map marks local hams heard on digital mode. New lines added as they appear.
Hams on FT8 WEBLINK https://www.google.com/maps/search/?api=1&query={LAT},{LON} 45.5223312,-122.6314468 K7REK 45.5413568,-122.7996473 WQ3U 45.4375907,-122.7697429 N7KPN 45.4030093,-122.9952450 K7YDL 45.6972326,-122.5115791 KB7AK 45.4200594,-123.0259679 N7IDB 45.4595954,-122.8148624 KA7EXM 45.4498134,-122.7072812 WA6GBW 45.6557622,-122.5283492 W6IWW 45.6975419,-122.5829146 NE7O 45.4200594,-123.0259679 N7IDB 45.4375907,-122.7697429 N7KPN 45.5477002,-122.8520895 WJ7WJ 45.4891249,-122.7220492 WB6OEE 45.6028566,-122.4485276 K7NOJ
Duplicate markers found above.
http://trails.ward.asia.wiki.org/assets/pages/places-heard-on-ft8/call-sign-check.html HEIGHT 100