Hallo,
über dies Unfähigkeit von OziCE habe ich mich auch schon geärgert
Folgendes schlug gestern in der Ozi-Mailingliste auf:
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At 10:18 AM 2004/01/20, Dave Patton [DCP] wrote:
> If you want to recalibrate a map using a different datum,
> or maybe have two versions of a map's calibration file,
> with different datums, here's the steps.
Here is a slightly revised version of the steps
that I previously posted:
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If you are going to be doing a number of maps, it will be
easier if you do them in 'groups', where each group has
the same "original datum"(e.g. ADG66, NAD27, etc) and the
same "new datum"(e.g. WGS84).
1)
Put "showcalpoints.dat" in the Ozi program directory.
See my "OziExplorer DAT files" for more information:
http://members.shaw.ca/davepatton/ozi/index.html#dat
2)
Make sure Ozi is setup with the Display Datum set to
"Datum of Loaded Map". You may also want to set the
Waypoint List Datum to "Datum of Loaded Map".
3)
Make a copy of the map's .map file, and then use Ozi to
open the map by using the copy of the .map file.
4)
You will see the calibration points shown on the map.
You may want to check the map calibration(File menu,
Check Calibration of Map) to confirm the number of
calibration points, and their locations on the map.
5)
In the position display area, confirm that the display
datum is showing the "original datum" that you expected
(e.g. ADG66, NAD27, etc), and then change it to the
"new datum"(e.g. WGS84).
6)
Provided there is a difference between your "original datum"
and the "new datum", you will see that the values for the
positions of the calibration points shown on the map image
have changed, because they are now being shown using the
"new datum", not the "original datum".
7)
Create waypoints where the calibration points are shown on
the map image, in the order of the calibration point numbers
(i.e waypoint 1 for calibration point 1). Because the
"Cursor Zoom window" doesn't show the calibration points,
you may want to increase the map's Zoom Range to make it
easier to place the waypoints.
Go into the map calibration screens(File menu, Check
Calibration of Map). You can use the tabs for the
calibration points to review the calibration points,
and it will show the waypoints as well, so you can confirm
the waypoints are properly positioned.
9)
On the Setup tab, change the "Map Datum" to the "new datum".
If desired, change the "Map Name" to indicate the "new datum".
10)
For each calibration point, use the "Wp" button, select the
corresponding waypoint, and click the "Use Wp" button. That
will transfer the waypoint coordinates to the calibration
point's Lat/Long fields.
11)
Save the map calibration, replacing the .map file copy. If the
original calibration was done using grid coordinates, you will
get a message that one or more calibration points have both
lat/lon and grid coordinates, and you will have to answer "Yes"
to proceed with saving the map calibration.
12)
One way to check the new calibration is correct is to open two
copies of Ozi, and in one open the original map calibration,
and in the other open the copy that you just modified. If you
then load some waypoints or a track into both, they should
display in the same position on both map images.
13)
If you want to change another map's calibration, clear all
waypoints, and then repeat steps 3 through 11.
--
Dave Patton
Canadian Coordinator, Degree Confluence Project
http://www.confluence.org/
My website: http://members.shaw.ca/davepatton/
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/OziUsers-L/
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Wastl