What are bathymetric maps?

Question

write a short note on it

Answer 1

They show the depth of surface water bodies such as lakes and oceans.

Answer 2

Bathymetric charts are the submerged equivalent of above water topographic maps. They are designed to present accurate, measurable description and visual presentation of the submerged terrain.

In an ideal case the joining of a bathymetric chart and topographic map of the same scale and projection of the same geographic area would be seamless. The only difference would be that the values begin increasing after crossing the zero at the designated sea level datum. Thus the topographic map's mountains have the greatest values while the bathymetric chart's greatest depths have the greatest values. Simply put, the bathymetric chart is intended to show the land if overlying waters were removed in exactly the same manner as the topographic map.

A bathymetric chart differs from a hydrographic chart in that accurate presentation of the underwater features is the goal while safe navigation is the requirement for the hydrographic chart. A hydrographic chart will obscure the actual features to present a simplified version to aid mariners in avoiding underwater hazards.

Bathymetric surveys are a subset of the science of hydrography. They differ slightly from the surveys required to produce the product of hydrography in its more limited application and as conducted by the national and international agencies tasked with producing charts and publications for safe navigation. That chart product is more accurately termed a navigation or hydrographic chart with a strong bias toward the presentation of essential safety information.

Bathymetric surveys and charts are more closely tied to the science of oceanography, particularly marine geology, and underwater engineering or other specialized purposes

Answer 3

Bathymetric Maps, topographic maps of the sea floor, portray the size, shape,
and distribution of underwater features through the use of depth contours and
bathymetric data. These maps, which are not used in marine navigation, serve as
the basic tools for performing scientific, engineering, marine, and marine
environmental studies required in the development of energy and marine
resources. However, the primary users of these maps are fishermen. The maps
are available in 1:100,000, 1:250,000 and 1:1,000,000 scale. Many of the
1:250,000 scale maps may be ordered with an overprint of the Minerals Management
Service oil and gas lease block information.

Bathymetric Fishing maps, produced at 1:100,000 scale, are tailored to the needs
of commercial and sport fishermen. The maps identify and portray the
distribution of bottom sediment types and known bottom obstructions, in addition
to the basic information found on the standard bathymetric map. They are
intended to aid fishermen and other users in the identification of sea floor
features, the location of potential fishing grounds, and the location of wrecks
or obstructions that might cause gear damage. These maps are overprinted with
LORAN-C rates to allow operators of fishing boats to fix their positions
relative to the fishing areas

Answer 4

Who cares !>?