Interactive Tab
In the interactive tab you can perform transformation of single
points and view information like scale and meridian convergence of
the output system.
Spatial reference systems are specified as so called MiniLabel,
see a description of the syntax here.
You can select predefined systems from the drop down lists.
NOTE: It is also possible to type MiniLabels yourself in the text
fields for input and output systems. In this way all valid
MiniLabels are available independently of the region you
have chosen to work in, which only determines the predefined default
systems. Hitting enter in the input or output system fields will
trigger a new transformation.
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Contents
/Affine modifications
For some systems, notably System34, it is usual for GIS-datasources to use an inverted / negative first axis in order for geometries to look right (north up, east right) when displayed in a GIS-system.
KMSTrans2 is able to handle such modified systems by applying an affine transformation to input or output coordinates. E.g. one can multiply the first axis coordinates by -1 to get "real" System34 coordinates
before applying the actual transformation.
Affine modifications can be setup using the menu entry 'Setup affine modifications' in the 'Settings' menu.
Units
You can specify units at the end of coordinates, if you like, but
this is not necessary. Generally units are in meters (m), except for
geographic systems where the angular units for coordinates can be:
- degrees (dg) ddd.ddddd...
- radians (rad) r.rrrrrrrrr...
- nautical units (nt), ddd mm.mmmmmm
- sexagesimal format (sx), ddd mm ss.sssss
You can specify the units to use for geographic systems and derived
angular output (meridian convergence, azimuth) in the 'Settings'
menu item.

Triggering a
transformation
To trigger a new transformation, hit enter in either an input
coordinate field, input or output system fields or simply by
changing input or output system from the drop down list.
A transformation can also be triggered by pressing the 'Transform'
button below the output fields.
Changing the input system will not automatically alter the
coordinates in the input fields (as in the 'old' KMSTrans)
- instead this triggers a transformation of what is already in the
input fields, as when the output system is changed. If you want to
change the input system and also have the input coordinates
transformed/updated, use the 'swap input/output' button.
Regions
Changing the region will have an effect on the predefined systems
in the input and output system drop down lists, where systems
relevant for the selected region are listed. You will still,
however, be able to use any system you like by typing in the text
fields. For example a Danish projection like dkmt1 can be selected
by typing the mini label when using the 'World' region.
Message Box
Error messages and various extra information from the
transformation will appear in the message box in the lower right
corner of the window. For example if a transformation produces an
error or warning it will be displayed in the message box.
