Question

Как определять абсолютную высоту любой точки и горной местности? Пожалуйста помогите!

Answer 1

Абсолютную высоту какой-либо точки местности, отметка которой на карте не подписана, определяют по отметке ближайшей к ней горизонтали. Поэтому необходимо уметь определять отметки горизонталей, используя отметки других горизонталей и характерных точек местности, подписанных на карте

Answer 2

Determining the Absolute Height of a Point in Mountainous Terrain

Determining the absolute height of a point in mountainous terrain involves using various methods and tools to accurately measure the elevation above a specific reference point. Here are some key points to consider:

1. Global Navigation Satellite System (GNSS) Technology: - GNSS technology, such as GPS, can be used to determine the absolute height of a point in mountainous terrain. By utilizing satellite signals, GNSS receivers can provide accurate elevation data for a specific location.

2. Topographic Maps and Contour Lines: - Topographic maps, which depict the shape and elevation of the land surface, can be used to estimate the absolute height of a point in mountainous terrain. Contour lines on these maps represent constant elevation levels, allowing for the estimation of elevation at a specific point.

3. Altimeter Devices: - Altimeters, whether in the form of handheld devices or integrated into GPS units, can provide real-time elevation data based on atmospheric pressure. These devices are commonly used by hikers, mountaineers, and pilots to determine their current elevation above sea level.

4. Geodetic Surveys and Benchmarks: - Geodetic surveys involve the precise measurement of the Earth's shape, orientation, and gravitational field. Benchmarks, which are permanent markers with known elevations, are established as reference points for determining the absolute height of other locations.

5. Digital Elevation Models (DEMs): - DEMs are digital representations of terrain elevation data. They can be used to extract elevation information for specific geographic coordinates, providing a means to determine the absolute height of a point in mountainous terrain.

6. Trigonometric Leveling: - Trigonometric leveling involves measuring vertical angles and distances between known points to calculate the elevation of an unknown point. This method is commonly used in surveying and geodesy to determine absolute heights.

In summary, the absolute height of a point in mountainous terrain can be determined using a combination of GNSS technology, topographic maps, altimeter devices, geodetic surveys, DEMs, and trigonometric leveling techniques.

I hope this information helps! If you have any further questions or need additional details, feel free to ask.