Output Scale Factor
Moderators: Brian Sloman, Jason Poitras, James Johnston
Output Scale Factor
I am working in UTM coordinates and want to publish ground distances. When I toggle on the Output scale factor I can view the ground distance but MSCAD labels the line with the grid distance. Is there a way around this?
The only way I know is that you have to change your UTM grid
coordinates to ground coordinates. MSCad just gives you the distances
as they are are and not what you want to change it to.
You can edit every distance, but that would be a pain.
You make a copy of the plan and change it to ground and copy the distances back the Grid plan.
Both sound painful.
Or you can do what I do and keep it simple.
I take my ground plan and move and rotate it into UTM.
All my distances are ground and yet have UTM coordintes.
Yes they are NOT Grid coordintes. You can't have it both ways.
The scale factor is so little that it make not much difference over
short distance.
I would set up two Control points that are on the plan that are grid.
I move the plan to one coordinte and rotate to the other point.
Now my plan is in UTM and all the distances will be ground and my bearings grid.
That how I do it.
coordinates to ground coordinates. MSCad just gives you the distances
as they are are and not what you want to change it to.
You can edit every distance, but that would be a pain.
You make a copy of the plan and change it to ground and copy the distances back the Grid plan.
Both sound painful.
Or you can do what I do and keep it simple.
I take my ground plan and move and rotate it into UTM.
All my distances are ground and yet have UTM coordintes.
Yes they are NOT Grid coordintes. You can't have it both ways.
The scale factor is so little that it make not much difference over
short distance.
I would set up two Control points that are on the plan that are grid.
I move the plan to one coordinte and rotate to the other point.
Now my plan is in UTM and all the distances will be ground and my bearings grid.
That how I do it.
 Darcy Detlor
 Site Admin
 Posts: 205
 Joined: Tue Oct 29, 2002 10:14 am
 Location: West Kelowna, BC
 Contact:
Use the Distance Labeling Scale Factor
Hi there,
We built in a special scale factor option that can be used for exactly this problem. The scale factor is under the MicroSurvey > MicroSurvey Defaults > Distances menu item. On the right side there is a edit field labeled "Scale Factor:". The default is 1, but if you put in a value it will be multiplied by the distance before the label is applied.
We built in a special scale factor option that can be used for exactly this problem. The scale factor is under the MicroSurvey > MicroSurvey Defaults > Distances menu item. On the right side there is a edit field labeled "Scale Factor:". The default is 1, but if you put in a value it will be multiplied by the distance before the label is applied.
Hi Darcy
Yea I knew about that one. Its OK if your wanting to say
put feet distances on a metric plan.
I may be wrong, but in UTM coordintes, the x and the y have two different
scales and every point also has a different scale. You have to apply each
scale fator to each points x, y then if you subtract you get Ground Distance between them.
Now maybe the distance scale factor might be close enough.
As you know I have been wrong a lot.
Just another thought.
Yea I knew about that one. Its OK if your wanting to say
put feet distances on a metric plan.
I may be wrong, but in UTM coordintes, the x and the y have two different
scales and every point also has a different scale. You have to apply each
scale fator to each points x, y then if you subtract you get Ground Distance between them.
Now maybe the distance scale factor might be close enough.
As you know I have been wrong a lot.
Just another thought.
OK, I was not quite right. Example:
Here is a small sample of UTM8317 points
Each point has its own scale factor.
I have not been able to view Grid Distance because of this.
I have had to convert each point thats on the grid to get the distance.
Or would I use the Scale Factor at the Centre Meridian. I my case, scale 0.9996 would be right.
Site Scale Elevation
ID Site Descriptor Convergence Factor Factor
1 0034 099940034  0 00.000 1.00015337 0.99997211
2 0507  0 00.000 1.00014992 0.99996796
3 0033 099940033  0 00.000 1.00014782 0.99996456
4 0201 001963021  0 00.000 1.00016909 0.99996587
5 0508  0 00.000 1.00014841 0.99996767
6 0510  0 00.000 1.00013861 0.99996195
7 0509  0 00.000 1.00013961 0.99996276
8 0512  0 00.000 1.00014896 0.99996647
9 0511  0 00.000 1.00014809 0.99996766
Here is a small sample of UTM8317 points
Each point has its own scale factor.
I have not been able to view Grid Distance because of this.
I have had to convert each point thats on the grid to get the distance.
Or would I use the Scale Factor at the Centre Meridian. I my case, scale 0.9996 would be right.
Site Scale Elevation
ID Site Descriptor Convergence Factor Factor
1 0034 099940034  0 00.000 1.00015337 0.99997211
2 0507  0 00.000 1.00014992 0.99996796
3 0033 099940033  0 00.000 1.00014782 0.99996456
4 0201 001963021  0 00.000 1.00016909 0.99996587
5 0508  0 00.000 1.00014841 0.99996767
6 0510  0 00.000 1.00013861 0.99996195
7 0509  0 00.000 1.00013961 0.99996276
8 0512  0 00.000 1.00014896 0.99996647
9 0511  0 00.000 1.00014809 0.99996766

 Posts: 1395
 Joined: Fri Nov 08, 2002 12:18 pm
 Location: Corbeil, Ontario, Canada
 Contact:
Scales
When dealing with UTM coordinates and labling the distance between two points, the scale factor to be used is normally the average factor between the two points or a local scale factor. When working over longer distances, a single factor for the entire job may not be possible.
Cheers,
Cheers,
Glen W. Cameron, C.E.T.
City of North Bay, Ontario
City of North Bay, Ontario
input/ output scale factor
Just a word of caution, if using grid coordinates and output scale factor,if doing a radial stakeout, don't use the radial stakeout icon, it does not apply the s/f. The perpendicular offset does not apply the scale factor.
Distance output scale factor
I use this feature regularly to annotate survey plans with ground distances from a UTM data base. This feature works fine for lines including short lines in a table. Unfortunatately it does not work for arcs connecting the lines in the table. Can you possibly fix this problem?