What is the absolute elevation of the Yellow Sea?

The absolute elevation of the Yellow Sea is 56, and the elevation difference is 29 mm from the elevation 85. In 1956, China stipulated that the multi-year mean sea level of the Yellow Sea (Qingdao) should be used as a unified baseline"Elevation of the Yellow Sea in 1956.

system"It is the first national elevation system in China, thus ending the complicated situation of elevation systems in the past. However, due to the short data series (1950 to 1956) of the Qingdao tide gauge station on which this base is calculated, the Chinese surveying and mapping authorities decided to recalculate the mean sea level of the Yellow Sea, and based on the tidal observation data of the Qingdao tide gauge station in 1952 and 1979, it was called "1985 National Elevation Datum, and the 1985 National Elevation Datum was obtained by using precision leveling to measure the level origin of the People's Republic of China in Qingdao.

The relationship between the elevation and the elevation of the Yellow Sea in 1956 is as follows: the elevation of the national elevation datum in 1985 = the elevation of the Yellow Sea in 1956, the national elevation datum was put into use in May 1987, and the elevation system of the Yellow Sea was abolished at the same time in 1956. The elevation of the origin of the 1956 Yellow Sea elevation level is meters.

The elevation of the horizontal origin of the 1985 National Elevation System is meters. Customary saying is"The new one is lower than the old one", the mean sea level of the Yellow Sea is"The new one is taller than the old"。

The Yellow Sea"Elevation" is the zero point of elevation established by China in 1985. Refers to the distance from a point to the sea level of the Yellow Sea in the direction of the plumb lineThe ground elevation is determined by the distance of the building ground relative to the plumb line, and the elevation ground elevation at 1m below the ground is obtained by subtracting 1m.

To put it simply, the elevation of the Yellow Sea is a reference point when we calculate the elevation, which is often referred to as the absolute elevation.

We define the level elevation of the Yellow Sea Sea as the elevation, and when we are in a place that is higher than the level of the Yellow Sea, it is a positive number.

The level represents the vertical height of a part of the building relative to the datum (the zero point of the level). Elevations are divided into relative elevations and absolute elevations. Relative elevation is to set the ground height of the first floor of the interior as the zero point of the relative elevation, which is used in buildingsConstruction drawings, the elevation dimension.

In 1985, China decided to adopt Qingdao Dagang.

The average sea level of the Yellow Sea determined by the tide gauge station in 1952 and 1979 is used as the zero point of elevation in China. The absolute elevation of any point in the territory is derived from this.

In China, the mean sea level height of the Yellow Sea near Qingdao (the average value of many years of observation.

It is determined as the absolute zero point of the terrain elevation, which is the absolute elevation, and the absolute elevation of the ground and buildings all over the country is based on this. In other words, the absolute elevation of the first floor of a building generally refers to the height of the first floor of the building relative to the average point of the Yellow Sea.

Indoor elevation is equivalent to the absolute elevation is the elevation of the datum as the zero point uniformly stipulated by a country or region, and China stipulates that the average sea level of the Yellow Sea near Qingdao in summer is used as the zero excavation point of the elevation; The calculated level is called the absolute level. In addition to the general plan, the relative elevation is generally adopted, that is, the floor outside the ground floor is used as the zero point of the relative elevation.

The zero elevation of the main ground in the interior is written in the ground floor plan of the absolute lead elevation as . If it is lower than the zero point elevation, it is a negative elevation, and the elevation number is preceded by a "-" sign, such as. If the elevation is higher than the zero point elevation, the "+" sign can be omitted before the elevation number, such as.

Summary. Hello,: The elevation of the Yellow Sea is 55 meters = 55 meters above sea level Because the altitude of our country is based on the sea level of the Yellow Sea. Wish.

Hello,: The elevation of the Yellow Sea is 55 meters = 55 meters above sea level Because the altitude of our country is based on the sea level of the Yellow Sea. Wish.

Hello, what is the relationship between the elevation of the Yellow Sea and the relative elevation.

Hello, the elevation of the Yellow Sea is the absolute elevation (that is, the elevation of the elevation), usually the level of the Yellow Sea is zero, such as a landmark height of 20m, that is, this place is 20m higher than the level of the Yellow Sea, the relative elevation is the elevation of a certain point as the zero point, such as the meter elevation on the architectural drawings is the elevation of the first floor of the ground is zero, and the elevation of the outdoor floor is relative to the ground of the first floor, 30cm lower than the ground of the first floor. The relative elevation and the absolute elevation are actually the relationship between addition and subtraction, the relative elevation is just the elevation of our site relative to a fixed control level point and the refueling, the number is simple, and the difference between the height measured by the nearby absolute elevation level point, addition and subtraction is the absolute elevation of our relative elevation control point. For example:

Our on-site building is , and the fixed elevation point (temporary leveling point) we set is, which is the relative elevation. The absolute elevation of the quasi-control point of the country near the annihilation of the Cong is that we measure it higher than it with a fixed point, so the absolute elevation of our fixed point is, and the absolute elevation of our building is. Wish.

Then what is the absolute elevation of 55 meters for the relative elevation?

For example, if the plus or minus zero point of the Dachunguo project is relative to the absolute elevation, then the position on the floor is equivalent to the elevation, and the absolute elevation is. On the contrary, the absolute elevation of a certain position is, and the relative elevation of Suinian is.

Therefore, it is difficult to give you an accurate answer if you only give me one piece of data.