At the moment coordinate lists are used by the following computation tools:
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Additionally, such lists are generated by | ||
Empty rows and pure comment rows are ignored.
In each other row of a coordinate list one point is defined. Each row consists of three up to five fields separated by semicolon or white space (= column separator):
The succession of rows in a coordinate list may be arbitrary, except for polygon computations and for the line scale factor, where the succession defines the polygon or the line.
Every coordinate list requires a name of coordinate system, i.e. an almost arbitrary string with restrictions as for point names, a type of coordinate system and a column format.
The following types are accepted:
The following rules must be obeyed:
The following formats are accepted:
pointname coordinates | pointname code coordinates | coordinates |
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Example: | Example: | Example: |
P1 23.06 16.10 17.11 Q2 14.02 19.63 17.05 007 63.3 44 //2D point | P1 Code1 23.06 16.10 17.11 Q2 Code1 14.02 19.63 17.05 007 Code2 63.3 44 //2D point //Code is currently ignored | 23.06 16.10 17.11 14.02 19.63 17.05 63.3 44 //2D point //Points are auto- //matically named. |
All three lists are identical, but in the latter list the points are automatically named. The standard automatic pointnames are 1,2,3,… Different options can be selected via . Please note the following examples:
initial name | increment | automatical pointnames |
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1 (default) | 1 (default) | 1; 2; 3; … |
10 | 100 | 10; 110; 210; … |
10 | -100 | 10; -90; -190; … |
abc10 | 100 | abc10; abc110; abc210; … |
abc10 | -100 | abc10; abc-90; abc-190; … |
abc | 100 | abc0; abc100; abc200; … |
Grid systems (type of system: Northing Easting Height or Easting Northing Height) are based on a local grading of the curved ellipsoid of revolution by Gaussian mapping (= Transversale Mercator projection on the ellipsoid). Due to the inevitable deformations the unit of grid coordinates does not coincide with the metric length unit . As a result of the conformity of the Gaussian mapping, the grid scale factor k is nearly constant for a small point area and can be computed automatically.
When doing computations with grid coordinates, it is supposed that all other metric values and scales are not distorted by the grid scale.
Details are found here: Other metric values and scales
If you want to compute an accurate grid scale for each individual point you should use .
The provides a reference point for testing your mobile navigation device. In the with ellipsoidal height h the point has the following coordinates:
λ = 13.734806°, | φ = 51.033778°, | h = 160.5 |
or | ||
λ = 13°44`.0884, | φ = 51°2`.0267, | h = 160.5 |
or | ||
λ = 13°44`5``.304, | φ = 51°2`1``.602, | h = 160.5 |
or | ||
E = 33U 411287.9 m, | N = 5654342.8 m, | h = 160.5 |
Below we give a number of equivalent notations for the coordinates of this point. Alternative notations of latitude and longitude explains units of measurement . In this table the chosen output decimal separator is not in effect.
Settings | Notation of coordinates | Comment |
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Type of system Longitude Latitude Height , unit of latitude/longitude Grad , column format Point Coordinates | HTW-reference-point 13.734806 51.033778 160.5 | |
and now with column format Point Code Coordinates | HTW-reference-point pillar 13.734806 51.033778 160.5 | |
and now with column separator semicolon | HTW-reference-point;pillar; 13.734806;51.033778;160.5 | |
and now with column format Coordinates | 13,734806 51,033778 160.5 | Input optionally with decimal comma |
and now with unit of latitude/longitude DegMin | 13.440884 51.020267 160.5 | Format ggg.mmddddd |
and now with unit of latitude/longitude DegMinSec | 13.4405304 51.0201602 160.5 | Format ggg.mmssddd |
and now without height specification | 13.4405304 51.0201602 | not possible with all computing tools |
and now with alternative notation for angles | 13.44`05.304`` 51°02`01.602`` | units of measurement |
and now with type of system Latitude Longitude Height | 51.0201602 13.4405304 160.5 m |
What follows the third coordinates on a row, is ignored (here m) |
and now with type of system Easting Northing Height | 411287.9 5654342.8 160.5 m | |
and now with type of system Northing Easting Height | 5654342.8 411287,9 160,5 | Input optionally with decimal comma |
and now with easting preceeded by the zone number | 5654342.8 33411287.9 160.5 | For the easting only 6 digits before the decimal separator are used. |
and now with easting preceeded by the last digit of the zone number | 5654342.8 3411287.9 160.5 | |
and now with abbreviated coordinates | 54342.8 11287.9 160.5 | Use false northing= -5600000 and false easting= -400000 |
and now without height specification | 54342.8 11287.9 | not possible with all computation tools |
and now with type of system X Y Z righthanded | 3904281.170 954274.291 4936033.017 | |
and now with type of system Y X Z righthanded | 954274.291 3904281.170 4936033.017 |
Coordinate lists may be
Two saved coordinate lists can be managed at the same time. When filtering and sorting by pointnames the comparison is lexicographic, this means that e.g. 1610 is between 10 and 20. The comparison is case-sensitive. The comparison of coordinates is of course numerical.
The third coordinates (Z or height) of a list may be manipulated as follows:
The filtered and/or sorted list may be transferred to some computation tool and processed or it may be transferred to ''Edit/view list'', while the original list is overwritten.
If in the coordinate lists of the computed points not enough decimal digits are displayed for you, it is recommended to load this list in a new browser tab or to a new coordinate list. Then you see more decimal digits.
When saving a list, possibly a previously saved list is overwritten. But for displaying a list in or or in a new tab this is not necessary.
If you use overlong pointnames, they are truncated in tables mostly to 12, sometimes to 9 leading characters. A warning is issued. To see the pointnames in full length, the same trick can be used.
See Filter, load and save coordinate lists.
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