What method is used when locating ones position on a map if you are located on a linear feature on the ground?

When locating your position on a map while on a linear feature, such as a road, river, or trail, the method typically used is called "line feature navigation." This involves using a technique known as "intersection" or "resection." By identifying two or more distinct landmarks on the map that align with the linear feature you're on, you can triangulate your position accurately. Additionally, you can use your current coordinates or odometer readings to further refine your location.