You can define your coordinate systems such as this to use all these pre-defined
units.
"--- Non-Earth ---"
"Non-Earth (inches)", 0, 2
"Non-Earth (feet)", 0, 3
"Non-Earth (yards)", 0, 4
"Non-Earth (miles)", 0, 0
"Non-Earth (millimeters)", 0, 5
"Non-Earth (centimeters)", 0, 6
"Non-Earth (meters)", 0, 7
"Non-Earth (kilometers)", 0, 1
"Non-Earth (US Survey Feet)", 0, 8
"Non-Earth (Nautical Miles)", 0, 9
"Non-Earth (Links)", 0, 30
"Non-Earth (Chains)", 0, 31
"Non-Earth (Rods)", 0, 32
Then upon Saving a file into this system after determining an appropriate set of
bounds, and then exporting to MIF, it will look like this example below. If
creating a MIF from scratch, etc., you need to have these defined in the
mapinfow.prj file first, then a MIF such as this will import correctly. This
example MIF header is a simple New York State boundary map in Non-Earth (Rods)
units.
Version 300
Charset "WindowsLatin1"
Delimiter ","
Index 1,2,3,5,20
CoordSys NonEarth Units "rd" Bounds (-1763537.17, 895418.11) (-1590726.56,
995157.86)
Regards,
-Bill
Mail List:owner-mapinfo-l
From: "Jacques Paris" <[EMAIL PROTECTED]> on
07/08/99 06:57 PM GMT
To: [EMAIL PROTECTED]
cc:
Subject: MI: non-earth maps and distance units
Non-earth maps can be defined for one of 8 different units
(in,ft,y,mi,mm,cm,m,km) but there are another 5 types of distance unit
(survey ft, li,rd,ch and nmi). I am able to generate maps in these units,
with a
create map for ... coordsys nonearth units "rd" bounds ...
and they seem to perform well.
However, when I query the projection of such maps I receive a plain lon/lat
(default when MI does not find the exact projection in its .prj file). For a
non-earth, that prj has a line like
"Non-Earth (millimeters)", 0, 5
The numbers 0 to 7 identify the 8 units mentionned above.
Would it be possible to add new projections for the 5 other units and what
could be their id?
TIA
Jacques Paris
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