The feature, running approximately North to North-East, on which the trigonometrical station is located is a

The feature running approximately North to North-East on which the trigonometrical station is located is a ridge. A ridge is a narrow strip of high land with steep sides, often with a continuous elevated crest. It is a long, narrow, elevated strip of land that rises above the surrounding area and is usually formed by the movement of tectonic plates. A trigonometrical station is a point on the Earth's surface that is used as a reference point for measuring angles and distances. These stations are often located on high points such as hills or mountains, which provide a clear line of sight for measuring angles to other points. A ridge is an ideal location for a trigonometrical station as it provides a high vantage point with clear views in multiple directions.