first What is an ellipsoid?
is at an ellipsoid is a three-dimensional shape in which the surface can be described mathematically. The form is a höhendimensionale equivalent of an ellipse.
Source: www.rpdms.com / ellipsoid.gif
second What is the name of the ellipsoid used in the GK system?
In 1841, led by Wilhelm Bessel in Europe, Russia and India, large-scale surveys, and calculated an earth ellipsoids that today still serves as the basis of the national survey. For this reason, we speak the ellipsoid of GK system from a "Bessel earth ellipsoids.
Source: www.wikipedia.org
third What is the difference between geographic and projected Cartesian coordinates?
Projected Cartesian coordinates: The points will be described in terms of mutually orthogonal axes. In the two-dimensional space, two axes needed to describe all the points clearly to. In the space dreidiensionalen successful expansion to an additional axis.
Source: www.geoinformatik.uni-rostock.de/einzel.asp?ID=1022
Geographic Coordinates: The position of a point on the earth is described in terms of longitude and latitude. And the earth in 180 degrees of latitude and 360 degrees of longitude is divided.
Source: www.wikipedia.org
4th What is the Gauss-Krüger projection system based on? (brief explanation)
called The projection method in the Gauss-Krüger Transverse Mercator projection system itself. The distortion at the equator is prevented by a conformal, cylindrical projection.
Source: www.geoinformatik.uni-rostock.de/einzel.asp?ID=1022
5th What advantages does a Cartesian coordinate system?
The major advantages of a Cartesian coordinate system lie in the orthogonal axes and the uniform metric classification.
Source: www.geoinformatik.uni-rostock.de/einzel.asp?ID=1069
6th Which units are to GK coordinates?
The laws and high value of Gauss-Krüger-coordinates in meters.
7th What is in this context, the term 'Meridian'?
Half meridian of the earth's surface that connects the poles beidne called Meridian.
Source: www.wikipedia.org
8th Why are used in the GK system called meridian strip?
The area between two meridians is called the meridian strip. Because with the conformal mapping of the Gauss-Krüger-System (GK-figure) in the-loving to length and area distortion, the extension of the meridian strip of usually three or six degrees of longitude is limited.
Source: www.geoinformatik.uni-rostock.de/einzel.asp?ID=-1673474302
9th How to recognize the code used the GK-strip to a coordinate?
Each meridian strip is divided by the central meridian in the middle. This ratio is derived from the integer multiples of 3 ° from the central meridian.
Source: en.giswiki.net / wiki / Gau% C3% 9F-Kr% C3% BCger coordinate system
10th Which formula can be the easiest of the central meridian of any GK-strip charge?
Accordingly, the formula for calculating the ratio "number of degrees of central meridian divided by 3".
11th Translate the terms Easting 'and' Northing 'in the current context.
The term "Easting" is the distance in the east. Here we also speak of the value of law. "Northing", however, is the high value.
12th What is meant by the terms 'False Easting' and 'False Northing'?
under "false easting" and "false northing" means a procedure in which the coordinates are changed by means of addition constants. Thus, a shift of the system being built on the x-and y-axis.
Source: en.mimi.hu / gis / or false_easting.html en.mimi.hu / gis / false_northing.html
13th Be 'False Easting' and 'False Northing' used in the GK system? (Why or why not?) When GK is
system used only "false Easting". The additive constant is 500 000m and causes avoid negative numbers are. "False Northing" however, is not used because this would change the distance to the equator, which in the case of the GK system is not necessary.
Source: www.wikipedia.org
14th Briefly explain the abbreviations 'OGC', 'SRS' and 'EPSG code'.
OGC (Open Geospatial Consortium): This refers to the development of spatial data based on common standards for the purpose of interoperability.
SRS (Spatial Reference System): This refers to the geographic area of reference.
EPSG code (European Petroleum Survey Group): Hiebei is a key for the reference system in which coordinates the geometry fields in a spatial database.
Sources: www.opengeospatial.org / www.geoinformatik.uni-rostock.de/einzel.asp?ID=-43809376 / http://62.153.231.87/alk/edbs2wkt/help/optdb.htm
15th What 'EPSG codes' in Germany (when using the GK system) used?
in Germany are currently used 9 different EPSG codes. These are:
- EPSG: 31 466
- EPSG: 31467 EPSG
- : 31 468
- EPSG: 31 469
- EPSG: 2166 EPSG
- : 2167
- EPSG: 2168 EPSG
- : 2398
- EPSG: 2399
0 comments:
Post a Comment