{"id":124707,"date":"2020-08-15T05:06:00","date_gmt":"2020-08-15T09:06:00","guid":{"rendered":"https:\/\/mp-2702.milesopedia.dev\/news\/how-works-great-circle-mapper-gcmap\/"},"modified":"2026-05-09T10:56:54","modified_gmt":"2026-05-09T14:56:54","slug":"how-works-great-circle-mapper-gcmap","status":"publish","type":"post","link":"https:\/\/mp-2702.milesopedia.dev\/en\/guide\/tutorials\/how-works-great-circle-mapper-gcmap\/","title":{"rendered":"How does Great Circle Mapper – GCMap work?"},"content":{"rendered":"\n

How does Great Circle Mapper – GCMap work?<\/h2>\n\n\n\n\n\n

Great Circle Mapper<\/a> – also known as GCMap or GCM<\/strong> – is a tool I regularly use. It provides a wealth of information on airports and the distances between two or more destinations.<\/p>\n\n\n\n

It is a particularly useful tool for flyer programs of airlines whose pricing is linked to the distance travelled.<\/a> It’s the case with British Airways Executive Club<\/a> or the new Air Canada Aeroplan program.<\/p>\n\n\n\n

It is also an ideal tool to visually present a route on a map, which is particularly used within the milesopedia<\/a> member community.<\/p>\n\n\n\n

Great Circle Mapper – GCMap settings<\/h3>\n\n\n\n

There are several parameters to be aware of depending on your objectives.<\/p>\n\n\n\n

Characters to know<\/h4>\n\n\n\n

Before getting to the heart of the matter, you should first know that there are four main characters to know with GCMAP<\/strong>:<\/p>\n\n\n\n