I realized that I never got back to the list with the responses I received to my question regarding COGO (Sept). Original questions:
PATRICK LADD
Unfortunately, my license does not include ARCGIS COGO.
Also from Patrick:
Now that I think about it, will problem 2 be solved under
on the Editor toolbar dropdown Editor > Options > Units and
check the Ground to Grid Correction:
This does not work when I'm using the Edit tools COGO input routine. Works well if I'm inputting directly using Edit.
From Mark Goetz:
For the curves you can try to enter them as being tangent, though
that certainly may not end up working. Regardless, start at the end if
the curve than run the COGO to the other end, then by a tangent curve to
complete. If it closes within reason then your good. If not, then you
need to end the COGO just before the curve and simply enter a curve
with the appropriate radius. You really can't "solve" these curve
issues without all of the appropriate parameters.
As
for the declination, I would skip the whole declination table approach
and work off rotating the completed surveys based on line of occupation
such as stone walls identifiable in available orthos or other
basemapping.
From Liz Crutcher:
http://gisobsessed.blogspot.com/2010/03/cogo-made-easy-in-arcgis-desktop.html
Hi
Ken, I found this article useful if you have not already come across
it. I haven’t done in a while so not sure I can help you specifically.
Liz
This was interesting and helpful.
From Eric Belt:
- When I go around a parcel, the curve direction (left or
right) is the direction I would turn if I were walking along
that line in the direction I have decided to go. Many times
there will be segments that are specified in the counter
direction to how you have chosen. Just swap north & south
and east & west to correct this. (example: n07-34-16w
would become s07-34-16e to change the direction 180 deg.)
- I frequently find that the north reference used by the
surveyor has no basis in the real world. I just go ahead and
draw the parcel, do my closure check, and convert the lines to
a polygon before rotating the whole thing the proper amount.
That sometimes requires an eyeball on features in the aerial
photos to approximate the alignment unless you can match it to
an adjoining parcel.
I've also had occasion to use the rotation routine suggested by Mark and Eric.
Thanks to all of you.