home > Experience > Determination of altitude above sea level. Sufficient altitude above sea level

Determination of altitude above sea level. Sufficient altitude above sea level

The highest capital in the world is the capital of the state of Mexico (Mexico City). It is located at an altitude of just over two thousand two hundred meters above level. Do you know the altitude of your city above sea level?

What might it be useful for? For example, to calculate atomic pressure.

And from knowing the pressure you can find out, for example, when, in which city the water will boil faster and where it will be hotter (when it boils). Again, there are rumors that the higher you live (for example in the mountains), the longer you will live.

Although, in my opinion, long-livers in the mountains simply do not have crazy neighbors who listen to music at night or work with a hammer drill in the morning.

But if it’s easier for us to live because our city is higher than others, then so be it.

Regarding the accuracy of altitude calculations, this is for the Google API.

For example, Yandex has completely different data. For example, if we take the city of Ufa, but our bot (taking data from Google) believes that the city is located at an altitude of 176.39 meters above sea level, and Yandex is 136.7 meters. So, there was a “small” error of 40 meters between the two search engines.

But for Saratov there are no such discrepancies.

Which of the two to believe, I will leave to your discretion. Faith is a subtle matter.

Where else can the result be used?

Again, the height above sea level will allow us to calculate, for example, how far we can see what is there on the horizon..

In addition, the bot will calculate the radius vector from the center of the Earth to sea level using the formula, in kilometers

The radius vector, which the bot calculates, also takes into account in its result the altitude at sea level for a specific locality.

By the way, relative to which sea is the height measured, where is the zero point relative to which they calculate the strength of the tide, or how much the level of this or that section of the ocean has risen?

The Baltic Sea is generally accepted as this sea, since it is least susceptible to tides and currents. There are several such places on Earth, the level of which can be taken as the zero point, but all of them are points located somewhere where there is no civilization, or any land at all.

Let's calculate several cities as an example.

Vladivostok

The resulting height of the object at sea level, in meters

Serrrgay 07-04-2012 10:56

Now my wife and I are choosing a house in the village. Budget is limited.

Criteria:

No further than 300 km from St. Petersburg.
Not further than 50 km is the regional center with a hospital, police, etc.
Availability of hardware in case of car breakdown.
The concentration of villages is no closer than 5-6 km from each other.
A village on the edge of the forest is a must.
Lack of large bodies of water and interesting places (there weren’t enough turiyas).
Lack of correctional facilities, prisons, military units, chemicals. production facilities, strategic facilities.
Away from major highways, at least 5 km.
Lack of profitability of the region in terms of development (oil pipelines, minerals, etc.).
Away from the borders (in this direction - east, northeast, southeast of the Leningrad region and Novgorod region).
So that there are no fellings.
So that the hunting grounds are for public use, loir, voo, etc. (I don’t want to be under the “pumps” renting the forest).
Individual housing construction status.
Not less than 15 acres.
The house is “living” for the first years while we are building it.

Isn't it a modest list? %) I've been searching for six months now.

Altitude above sea level... The most damn difficult thing. At first I wanted at least 150-200 meters. Then I lowered it to 60-100 meters. The hardest damn thing. All the places that are “interesting” to me are 30-40 meters above sea level.
So I’m thinking, maybe I’m wasting my time trying to find high places?
I know that the weather is much better at higher elevations. Once we were working on a business trip at Valdai. So you drive up to it, everything is in clouds, but the weather itself is sunny.
And for agriculture - is it relevant?
It’s paranoid, of course, to look for a site with such a reserve for the future that the World Ocean will not be flooded, if that happens.

Criticize

Joker.udm 07-04-2012 11:18

I thought somehow. 70 meters all the ice of Greenland and the South Pole. Don't worry. At the same time, I did not subtract the flooded area.

Vasek 07-04-2012 11:41

quote: Originally posted by Joker.udm:

70 meters all the ice of Greenland and the South Pole

I have repeatedly seen a figure in the region of 80 m when all the ice melts

Vovan-Lawer 07-04-2012 11:49

Don't forget that approximately 70% of the Earth's population lives on the shores of seas and oceans. And where will all this crowd rush when the BP comes? It is not so much the sea waves that need to be feared as the human waves.

Joker.udm 07-04-2012 11:57

Well, about the same thing. Plus minus bast shoes. I didn’t count on supercomputers either. Our country of evergreen tomatoes will be higher in every way

Taraz999 07-04-2012 12:04

The GPS navigator near my house shows 571 m above sea level
Chinese watch with altimeter 563 m
I think that's enough for the flood

borsek 07-04-2012 12:45

I’m also puzzled by something high. Distance from the coastline also plays a role, but 60 in my opinion is not enough. 100 will be just right.

I saw a similar map somewhere online, only there you add the level of the world’s oceans by at least a meter and see where the islands are, if I find it I’ll give you a link.

borsek 07-04-2012 13:00

quote: Interesting article

yeah. but large cards need to be bought...for dead presidents.

Serrrgay 07-04-2012 14:10

quote: Don't forget that approximately 70% of the Earth's population lives on the shores of seas and oceans. And where will all this crowd rush when the BP comes? It is not so much the sea waves that need to be feared as the human waves.

You're right! I thought about this too, I’m looking for this place in the middle of nowhere. And it would be desirable to have a local height, so that human waves would pass by, to where the heights are consistently high.

Bahing308 07-04-2012 16:08

Generally a button accordion.

http://www.floodmap.net/

Only if all the ice begins to melt will the flooding rate be 10 millimeters per year. so 1 meter in 100 years. calculate how long you can use the area before drowning

Puschistik 07-04-2012 16:32

quote: only if all the ice begins to melt, the flooding rate will be 10 millimeters per year. so 1 meter in 100 years. calculate how long you can use the area before drowning

Well, you also need to take into account that if it melts somewhere, then it freezes somewhere...

Gardener 07-04-2012 16:39

The topic came down to flood maps.
At least there is logic on floodmap.net, but in Scallion’s predictions there is mysticism and... Business. Because this entity sells flood wall maps for $50 each on its website.

Meanwhile, floods are just one of the points.
You will like the list of criteria. I myself am also from St. Petersburg, but I have not yet found such an ideal place for a house in the village (read: shelter). As an option, I’m considering the Vologda region, only it’s not 300 km, but 600, and there’s an unrealistic amount of deforestation there(

ShtroffRus 07-04-2012 16:53

scientists call the figure 100 meters, Zetas say 250m

As for me, so much is not enough

Volunteer 07-04-2012 17:30

Sergey, do you want 30 acres with a house 50 km from the LP towards Alekhovshchina, Savozero, Looir, I don’t know about the height. price 400 with kopecks.

Nuxa 07-04-2012 17:38

As for me, it’s enough for our lifetime. Everything will not melt... Only it can be flooded in different ways - from rain to hurricanes. The weather is changing much faster than the glaciers are melting. Or an accident involving chlorine, for example. So I wouldn't bother with the absolute height, but would look at a higher location relative to the rest of the area in the area.

cms2176 07-04-2012 19:17

There is a WORLD FLOOD MAP application on Android - add meters and see the result.

Volga sky 07-04-2012 23:25

+72 meters - at the entrance. At 92, the city turns into an island.

Serrrgay 08-04-2012 12:20

quote: I’m considering the Vologda region as an option, only there it turns out not 300 km, but 600, and there’s an unrealistically lot of deforestation there(

Why not? You can get closer. In the area of Boksitogorsk, north. part of Novgorod. Good places near Podporozhye, but cleared areas

quote: Generally a button accordion.
Here's a link to flooding and choose as many as you want.
http://www.floodmap.net/

I use another card: http://www.vhfdx.ru/karta-vyisot
The floodmap is too approximate, but here each specific place can be accurately “measured”.

Also Russian Wikimapia, there are even some military units marked (not all) and prisons, and much more.

Also a map of soils, geological faults, geological, map of oncological diseases, background radiation, etc. But this is all secondary.

quote: scientists call the figure 100 meters

ShtroffRus 08-04-2012 11:06

Where did the hundred come from? It seems like they always promised 60?

Well, apparently they took into account the results of gradual melting

and in Russia, high places are where the population is least and (or) simply wilderness.
Belarusians will have nowhere to hide anyway

gee, just now I asked the Internet your question, data from 91SM to 240M, the govcheg campaign is our everything

Joker.udm 08-04-2012 11:11

Maybe the creator of the topic should look at a dlomik in Finland? Well, as an option... I don’t think it’s more expensive there than in Russia. On the way back he will buy Swedish pots and shop in Russia

Kazbich 08-04-2012 22:00

quote: Originally posted by Volga sky:
TS Elovenko misread himself. After reading it, I also rushed to
+72 meters - at the entrance. At 92, the city turns into an island.

At +150, I’ll have some water right at the entrance.

NE 09-04-2012 02:20

It is difficult to guess here in order to meet all the conditions. It is not known when, where and what will be built and carried out.
At the dacha it was a remote place, 150 km from Moscow, forests, fields, almost the Tver region.
A year ago, a power line of 500 kV was laid a kilometer away from the site! Now the gas is supplied through the main line, at high pressure, closer to the site.

Nothing at all will be built, only probably in some government reserve.

otar07 09-04-2012 03:33

quote: Originally posted by Serrrgay:

Now my wife and I are choosing a house in the village. Budget is limited.

Damn! Competitors!

------------------
Bring a long gun to a gunfight. Bring all you friends with the long guns.

sauer 09-04-2012 04:28

The height above sea level is of course good, but take into account the flood situation.
Lensk, altitude above sea level 240m. in 2001 the city was completely washed away.

Taraz999 09-04-2012 07:01

quote: The height above sea level is of course good, but take into account the flood situation.

not only the flood situation

max82 09-04-2012 07:54

23m and the house sank

Serrrgay 09-04-2012 17:49

quote: Maybe the initiator of the topic should look at a dlomik in Finland? Well, as an option... I don’t think it’s more expensive there than in Russia. On the way back he will buy Swedish pots and shop in Russia

I can't afford it financially. And in Russia, oddly enough, it is freer. (strictness of laws, etc...)

ZanudaIII 09-04-2012 19:52

By the way, it is necessary to take into account not only the presence of a reservoir upstream, but also the possibility of constructing an artificial reservoir or the formation of a natural dam (landslide, collapse) downstream. Source - memories of the famous bell tower in the Volga...

Kazbich 10-04-2012 01:22

quote: Originally posted by Taraz999:

we need to see if there is a reservoir nearby...

There were floods in Moscow. It's been a long time, really. If you remove all the dams, then to hell with Red Square, let them walk on it in waders.

ShtroffRus 10-04-2012 06:20

TS, at the rate of ice melting, the water will reach the level of your flooding, then this will worry your great-grandchildren

How are heights measured?

This question is followed by related ones. What are absolute and relative heights? Why are there triangulation signs on the peaks? When was height first determined? What does "above sea level" mean? Does this level fluctuate? How is altitude measured from airplanes? What are command points?

Displaying the area in a reduced form on diagrams and maps, people have always paid attention to the mountains. They were noticeable and necessary landmarks. The geographical map did not appear immediately: it survived its development from clay, parchment, and birch bark samples to perfect cartographic models. At first, much depended on the draftsman, his sense of space, and his ability to mentally view the Earth from above. The mathematical reliability of the relief, of course, was absent.

Over time, the profession of renter appeared. We used a measuring cord, a measuring wheel, and a compass. In the 16th century, prototypes of measuring geodetic instruments were invented - scales, theodolite, then range finders and levels. Physicists helped measure the height of the mountain, or, as topographers say, “take vertical marks.”

Blaise Pascal asked his acquaintances in Clermont to climb Mount Puy de Dome with a mercury tube. The scientist’s assumption was confirmed at altitude: the mercury column dropped. Since then, it has become common to measure the height of the area using a mercury barometer. Instruments appeared for determining altitude by the temperature of boiling water vapor: hypsometer, thermobarometer, hypsothermometer. The principle of operation is this: as you rise, the air pressure decreases. At the same time, the boiling point of water also decreases - approximately 0 degree per 0.27 mm of mercury. According to the tables, atmospheric pressure is indicated, and the altitude of the area is determined from it.

This is, one might say, a “field” method. But not every peak is so easy to climb to take measurements. And in the 17th century, the Dutch astronomer Snellius proposed a triangulation method, when heights are determined “from the side,” using reference points. This method is also used for topographic surveys from aircraft and artificial satellites.

The heights of the peaks began to be distinguished: absolute - from sea level and relative - from the foot of the mountain, from the underlying plain. It is clear that the absolute heights of mountains are always greater than the relative ones. For the unity of the measurement system in geographical science, it is customary to count these measurements from the level of the World Ocean. So, after indicating the height, a noticeable prefix “above sea level” appeared, or if it is not there, then it is simply implied. But the ebbs and flows are known. Sea levels are not constant: they began to be distinguished: instantaneous, tidal, average daily, average annual, average long-term. This latter, according to international agreements, has become the most stable in order to “link” the height of the mountains to it.

It is clear that many peaks and ridges in the oceans that do not reach the surface are measured differently. This highest seamount was discovered in 1953 near the Tonga Trench off New Zealand. It rises from the seabed to 8690 m, and its peak is 365 m below the surface of the water. And if we start not from sea level, but measure the height from the underwater base, then the tallest mountain in the world turns out to be Mauna Kea (“White Mountain”) on the Hawaiian Islands. Its total height is 10,203 m, of which only 4,205 m are above sea level.

The other day I was asked at what altitude above sea level are the Crimean cities of Yalta, Alushta and Simferopol. At first I wanted to brush this question aside, but curiosity prompted me to check what the Internet was writing on this topic. It turned out that it is almost impossible to find references to the height of most cities of the former Union on the Internet. Struck by this fact, I decided to correct the situation.

To begin with, I went to Wikipedia and made inquiries about what altitude above sea level is and from which sea it should be calculated. Here's what they write there:
Height above sea level- a coordinate in three-dimensional space (the other two are latitude and longitude), showing at what level relative to the sea level taken as zero this or that object is located.
Baltic height system(BSV) is a system of absolute altitudes adopted in the USSR in 1977, which is counted from the ground zero in Kronstadt. The heights of reference geodetic points are measured from this mark, which are marked on the ground with various geodetic signs and plotted on maps. Currently, BSV is used in Russia and a number of other CIS countries.

In theory, everything is clear - you need to take a detailed topographic map and see what heights are indicated there. But where can I get this card?
The first thing that came to mind was to look into OziExplorer. This is a special program for working with GPS (satellite navigator). One of its functions allows you to determine the height simply by pointing the cursor at a place on the map. With her help, I easily found out that Alushta is located at altitudes from 0 to 130 meters above sea level. Yalta - from 0 to 200 meters, Sevastopol - from 0 to 100, Simferopol - on average 250 meters above sea level.

However, this method is not very universal. After all, the question still remains: “where can I get a map?”, this time digitized. I had maps of Crimea, but things didn’t work out with the rest of the world...

The answer literally lay on the surface, that is, on the Internet. This is not the first year that the service has been operating there. Google Earth- a kind of digital globe glued together from photographs of the earth’s surface from a “cosmic” height. There certainly should be a height detection function. I downloaded the Google Earth distribution (free version), installed it and started exploring the menu. There were no altimeters there. Strange... Maybe I should read the certificate? I didn't find it either :(
Almost in despair, I suddenly noticed numbers running quickly at the bottom of the screen. Eureka!!! This was the altimeter.

To celebrate, I began to run around the map and measure the height of all the cities in a row.

The height of Yekaterinburg above sea level is 250 meters.
The height of Moscow above sea level is 130 meters.
Saratov - 40
Makhachkala - 15
Krasnoyarsk - 140
Perm - 150
Chelyabinsk - 250
Ufa - 125
Kazan - 90
Nizhny Novgorod - 70
Ivanovo - 130
Yaroslavl - 98
Voronezh - 104
St. Petersburg - 13
Arkhangelsk - 7
Novgorod - 28
Murom - 105

Altitude above sea level of some cities in Ukraine:
The height of Kyiv above sea level is from 90 (the level of the Dnieper) to 190 (the famous Dnieper steeps) meters.
Kharkov - 122
Chernivtsi - 240
Khmelnitsky - 299
Ternopil - 336
Vinnitsa - 294
Cherkasy - 80
Krivoy Rog - 85
Zaporozhye - 75
Kherson - 50
Donetsk - 241
Dnepropetrovsk - 68
Sumy - 125
Poltava - 150
Chernigov - 117

In the western part of Ukraine I was interested in the heights of such settlements:
Lviv - 270
Ivano-Frankivsk - 343
Uzhgorod - 187
Mukachevo - 181
Rakhiv - 430
Yasinya - 650
Yablunytsky pass - 930

I hope you understand that all the data obtained is not very accurate. Google Earth is not a professional tool with guaranteed accuracy and reliably known errors. She has completely different goals.
In addition, the term “city height above sea level” itself is very conditional. After all, a city is not a point, but a huge object, different areas of which have different heights.

The most famous mountains in Russia are the Caucasus. They inspired the creators of the Golden and Silver Ages. Lermontov’s poems are an excellent confirmation of this, as is Pushkin’s “Prisoner of the Caucasus” and Tolstoy’s story of the same name. And someone happened to live here, near the very mountain peaks. TravelAsk will tell you about the highest city in Russia.

City in Kabardino-Balkaria

Tyrnyauz is the center of the Elbrus region, which is located in Kabardino-Balkaria. It is located in the southwest of the republic, on the banks of the Baksan River, just 40 kilometers from Elbrus. Just look at the views from the windows of the houses.

This is the highest mountainous city in Russia: it is located at an altitude of 1307 meters above sea level.

The city is small, its area is only 61 square kilometers. But the landscapes here are impressive, especially against the backdrop of the “dead” panels.

The elevation changes are enormous: 1.5–2 kilometers.

The entire area is rugged with ridges and gorges in which mountain rivers “live.”

The city even has “its own” peak - the highest point of this settlement is considered to be rocky and steep Toturbashi, its height reaches 2786 meters.

They say that during fogs and low clouds, cranes fly near the surface of the river. This is probably why the city got its name: Tyrnyauz is translated from the Karachay-Balkar language as “crane gorge.”

History of the high mountain city

In 1934, a tungsten-molybdenum deposit was discovered in this territory, where a mining and processing plant was opened. This is where Tyrnyauz grew up. At first, workers from the local Gulag worked here, and then civilian workers took their place. After the collapse of the USSR, the city had a hard time: the metal mining plant, suffering from periodic mudflows, was slowly dying. People began to move to larger cities. And now it’s some kind of ghost town with dilapidated houses and terrifying crime stories, leaving an eerie impression.

Of course, there are plans to revive the city and the plant in particular, but this has been going on for the last 15-20 years.

Today, the road leading to Elbrus passes through the city, so many tourists see Tyrnyauz.

Who is taller than Tyrnyauz

But the highest settlement in Russia is the village of Kurush. It is also the southernmost point of the country. It is located in the Dokuzparinsky district of Dagestan at an altitude of 2560 meters above sea level.