For hundreds of years, the only way to measure ocean depth was a kettlebell, usually lead, with a thin rope. Not only was this method time-consuming, it was highly imprecise. The drift of the vessel or water currents could pull the rope off at an angle, making the depth measurement inaccurate. Then the ropes were replaced by echo sounders (sonars). Bathymetric studies have shown that the topography of the ocean floor is very diverse. Plains, canyons, active and extinct volcanoes, as well as mountain ranges are hidden under the water.
In 1978, an experimental satellite was launched to study the oceans. One of the amazing discoveries then was the fact that the surface of the ocean is not "flat", but sinks and rises in different areas. When the ocean surface was mapped, the falls corresponded to the depressions in the seabed, and the rises corresponded to the sea mountains and ridges. Over time, the technical capabilities have increased. Satellites appeared and detailed maps of the depths of the entire world ocean were compiled.
The reason for these drops and rises in the ocean surface is in the gravitational field of the Earth. This is the gravitational model created by the GRACE satellite:
As a result of the painstaking work of the satellites, other interesting maps appeared. This great infographic visualizes the deepest places in the world. There is also Lake Baikal, which can be compared with other deep lakes in the world.
But finally, all the secrets of the topography of the ocean were discovered with the help of satellites such as Jason-1 and Jason-2.
Satellite altimeters measure sea surface elevation and other features of the ocean surface. Using the emitted microwaves, they measure the height of the water in the ocean, help make weather maps, predict the formation of hurricanes and observe the level of the oceans.
To create just such a map, we needed a summary knowledge of bathymetry and seabed topography. Here you can see the relief features of the earth's surface under water, and on the graph you can find out the depth of the world ocean in meters.
Download the installation file:
About the program
naviGorodomlyru Is a free gps navigator using google maps service.
The program is designed to work in android devices.
To determine the geographical coordinates, the device's GPS module or WIFI is used.
Installation
Attention! Minimum Android version required for naviGorodomlyru to work correctly: 4.0.3. *** Read how to determine the version of your device.The program must be installed in the main memory of the device.
Please make sure you have enough free space on your device before installing.
- Copy the installation file to your device (the file has the extension "apk")
- Find this file on your device using the file manager (depending on the android version, the name of the manager may change) and run it.
- After a short time, naviGorodomlyru will be installed on your device.
- After finishing the installation of the program, a message about this will be displayed
Having problems installing naviGorodomlyru, read it.
How to use
After correct installation, naviGorodomlyru can be found in the general list of programs on your device.
At the first launch of the program, databases are additionally installed (they require ~ 1 Mb free space on the device).
After the first launch, the program settings menu will immediately open. You don't need to change anything, click OK.
This will open a google map (subject to internet availability). If there is no Internet access, the map will be displayed empty (with the exception of some markers)
In the first version of the program, maps of the depths of several reservoirs, fishing spots and hotels, houses or camp sites along the reservoir are available.
System menu. The appearance may vary depending on the version of Android. When using naviGorodomlyru, you need to choose how the device will determine the geographic coordinates. To do this, press the "GPS" button in the main window of the program and select the method for determining the coordinates. After that, you can return to the program.
The most accurate way to determine coordinates: GPS.
What will be shown on the map (hotels, fishing spots, depth maps) can be specified in the program settings.
The full functionality of the naviGorodomlyru program is available when using the program in devices with android versions 4.1.2 and higher.
When using devices with android version 4.0.3, when you change the coordinates of your location marker, the center of the displayed map will not follow the location of the marker. On such devices, the map must be manually pulled behind the location marker.
Markers
| marker | Decoding |
| Hotels, camp sites and private sector houses | |
| Places of active biting of bream | |
| Places of active biting of perch | |
| Places of active biting of pike | |
| Active biting sites for pike perch |
Information on markers can always be viewed in naviGorodomlyru. To do this, click on the "HELP" button in the main window.
Depth maps
Depth maps are displayed only at a sufficiently high magnification google maps. For example, if you use a map zoom value at which the entire central part of Russia fits on it, then the display of depth maps will be forcibly blocked. This is done to prevent memory overflow on your device.
A delay in the display of the depth map of about 5 seconds is allowed at the beginning of the display of a fragment of the reservoir for which there is a depth map.
Read about which depth maps are available in your version of the program.
Fish places
Fish spots are also displayed only at large zoom on google maps.
At the first display of fish spot markers, a delay of up to 5 seconds is allowed for their display on the map.
Read about which bodies of water are available for fishing in your version of the program.
Hotels, private sector
The markers of objects that provide hospitality services are available for display only with a high magnification of a fragment of a google map.
Using markers, you can book a hotel, hotel, etc. If you click on the marker, an information window will appear with brief information on this object. If you click on this window, you can go to the online object booking page.
A delay of up to 5 seconds is allowed when displaying these markers at the first display of a map fragment.
Bottom relief (location of pits and "cool" fishing spots) is a key factor influencing the success of fishing. It has a lot of weight compared to the quality of the tackle, the fishing technique, the choice of baits, baits, and even experience. Full equipment and expensive ammunition will not give anything when casting in a remote, poor place, where the fish is absent or weakly bite. A map of depths, pits and fishing spots gives knowledge of the bottom topography of reservoirs. The depth map visualizes the features of the underwater landscape, its key characteristics. The tool helps to predict promising fishing areas promising a significant catch, read the underwater landscape, helps to calculate depth lines, potentially catching points. The fishing card is useful when fishing from the shore and from a boat.
The map functionality provides great information for any fishing method. The map is useful for fishermen, regardless of their experience, due to the large list of parameters necessary for successful fishing. The system is multilevel, based on information from Yandex.Maps. The base includes a compilation of three cartographic resources, which guarantees the accuracy of the calculation results with small errors. The program displays depth indicators in navigable rivers, seas and oceans, calculates potential pits, where bites are more frequent, fishing places of all members of the site. You can leave personal "beacons" from successful places where the catch has impressed, so that if necessary, return to a familiar point next time.
Displayed data: depths, pits (including Navionics data), user-added fishing spots, exact coordinates of the desired location. Fishermen have access to zoom and search options, they can select the desired map layer, calculate the current location. Full screen mode introduced. The interface of the card is intuitive - the functionality is balanced, all the necessary buttons are at hand, nothing more. It is easy to use, regardless of fishing experience - the data of the depths of rivers and reservoirs is exhaustive.
Identification of pits, international depths and fishing spots. When you click on the appropriate buttons, you will see the pits fixed by the program that are available in the reservoir of interest. Natural depressions from 3 m are displayed, the starting value depends on the bottom relief of a given river, sea, ocean and can be reduced. Please note: fishing pits are taken out of the fairway zone. The service does not determine the length, extent, direction of the depressions and other additional characteristics of the landscape. Its functionality is focused solely on calculating the depths of a certain zone and their location. With the help of the presented platform, you can find out the data of rivers, oceans and seas of any region, area.
Visually visualizes the landscape, showing the user the latitude and longitude of a given location / point. After clicking on the desired location, the program displays a detailed geographic summary. The function will help to plot a route without geographical names, the coordinates calculated by the fishing map are enough. The location determination option is universal - the information can be used in an echo sounder, GPS device, navigator, chartplotter. The program helps you navigate the terrain thanks to a convenient zoom function and accurate calculation of distances between any number of points.
