again
If you want something quick and dirty
If it is not on the 10 cm but in meters this can help
the earth is 40.000 km around
this is 360 degrees
than you can say
1 meter = 360 / 40.000.000 = 0.000009 degree
if you want to alter the degrees just use this knowloge
CadInputQueue.SendCommand "Gcoord point " & Longitude + (Xdisp *
0.000009) &
"," & Latitude + (Ydisp * 0.000009)
This gives results that are more by the throuth
But be aware, this is a quick and dirty trick
The results are not precise but far better as you did before
Greetings Olaf
olaf.giezen...@[EMAIL PROTECTED]
schreef:
> Hello
>
> What are you doing ??
>
> first if you use a gps you get WGS84 coords (lat, long)
> This are degrees!, not meters, feet or something
>
> What you have to do
> 1: make from the lat/long XY in your projected coordinate system,
> 2: here you can add/substract the coords out of the distcance measure
>
> For the proper formulas just google, it is all out there.
>
> be aware that lat / long is not equal lat/long
> there are many systems, it can difference as much as 100 meter
>
> Success
>
> Greetings Olaf
>
> freeman.matt@[EMAIL PROTECTED]
schreef:
>
> > So I posted this thread over in the Bentley groups last week, but no
> > responses and I'll give it a shot here...
> >
> > My group does a lot of mapping using Geographics, a GPS (which returns
> > lat and long) and a rangefinder (which returns distance and bearing
and
> > heading). The five datums are written into a log file for each point
we
> > want to plot on a drawing. I've been tasked with writing a program
> > which will read this logfile, im****t the base lat and long coordinates
> > into geographics, and then offset the coordinates using the distance
> > and bearing information from the rangefinder.
> >
> > At this point, I can break the log file entrties into the individual
> > components (lat,long,dist,bear,inclin) and place these points in the
> > drawing in the following manner...
> >
> > CadInputQueue.SendCommand "Place Point" CadInputQueue.SendCommand
> > "Gcoord point " & Longitude & "," & Latitude
> >
> > I am also able to use trig and solve for the appropriate X and Y
> > displacment like this...
> >
> > Angle = Angle * 3.14159 / 180
> > Xdisp = Cos(Angle) * Distance
> > Ydisp = Sin(Angle) * Distance
> >
> > Unfortunatly, this is where I run into trouble. If I simply do it like
> > this...
> >
> > CadInputQueue.SendCommand "Gcoord point " & Longitude + Xdisp &
> > "," & Latitude + Ydisp
> >
> > ...Geographics interprates the X and Y disp variables as degrees
> > instead of feet. Needless to say, this tends to skew the offset by a
> > few million feet instead of the hundred or so desired.
> >
> > If anyone has an idea as to how I could select the actual coordinate
> > points of the last thing drawn or run the geographics coordinate
> > conversion in a way to return the coordinates in a manipulable form,
or
> > anything that would work, please let me konw.
> >
> > Thanks in advance.
> >
> > -Matt
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