A Charles Sturt University (CSU) historian has contributed to the development of a new heritage trail on the theme of early surveyors as part of the continuing story of Bathurst.Dr Robin McLachlan, adjunct senior lecturer in the CSU School of Humanities and Social Sciences, is the researcher and writer for new signage to accompany a banner flag for the heritage trail which is being developed by Bathurst Regional Council with the Institution of Surveyors NSW Incorporated, and NSW Land and Property Information.The Macquarie's Meridian banner flag and accompanying interpretation sign will be unveiled at 12pm Wednesday 30 November by the Mayor of Bathurst, Councillor Gary Rush, and Dr McLachlan."The Macquarie Meridian banner flag offers a visual reminder of Bathurst's connection with Governor Macquarie's plan in 1815 for a town on this site," Dr McLachlan said."It underscores Bathurst's claim of being a Macquarie Town, as it was built on the site chosen in 1815 by Governor Macquarie and drew on his flag staff for the laying out of its blocks and streets in 1833."It also provides a visual connection between today's Bathurst and the first settlement, established in 1815, of which nothing remains to be seen."The accompanying interpretation sign also draws attention to the original form of the landscape, namely a broad ridge running from the river to Wahluu (Mount Panorama) which offered a well-drained site for a town."The flagpole, with the banner, sits alongside the survey line (the meridian) that runs from the site of Macquarie's 1815 flag staff, now the site of the Bathurst Bicentenary Flag Staff, through the centre of Bathurst town, as set out in 1833. The same flag staff site was used as the survey base point in 1833, which sees the meridian running exactly midway between William and George streets.​"Macquarie's Meridian is a significant feature in the story of Bathurst," Dr McLachlan said. "Bathurst has an amazing history and there are many stories yet to be found and shared. As an historian, I expect to be kept very busy for a very long time."