Civil Engineering Reference
In-Depth Information
16.4 Information Shown on a Boundary Survey Plan
The information which is shown on a plan will be dependent on the plan's pur-
pose. If the plan is to be submitted to a planning board or other agency, they will
probably have their own specific requirements. Even if an approving agency or
statue requires certain information to be shown on a plan, there are some general
rules and good practices to be considered when drafting a plan. This section is not
intended to be an exhaustive treatment of drafting survey plans, it is only intended
to provide the reader with a general introduction to some of the more important
points.
16.4.1 General Requirements
North should point generally toward the top of the sheet as in Figs.
16.1
and
16.2
.
A north arrow must be shown on every drawing and the arrow should be labeled
showing the basis of bearing system used as in Fig.
16.3
. In this plan the north
arrow is labeled
Magnetic
.
The plan must be drawn to scale and the scale noted on the plan. In most CAD
programs the units are real world units so everything is automatically to scale.
Scale notation is often done in the title block as in Figs.
16.1
and
16.2
. If it is
necessary to show a detail of some area, the detail should show the scale or, if the
detail is not drawn to scale, it should be labeled “No Scale”. Because a plan can
be reduced or enlarged using a copier it is a good idea to show a graphic scale.
Fig.
16.4
shows a typical graphic scale. When a graphic scale is drawn on the plan,
shrinking or enlarging the plan also shrinks or enlarges the graphic scale to it can
always be used with a divider or ruler as an aid to estimating distances on the plan.
If the location of the parcel is not apparent from the plan itself, it is usually a
good idea to add a
Locus Map
. A locus map is a small map on the drawing show-
ing the distance from the nearest road intersection or some other prominent feature
which would help someone unfamiliar with the locus to find it.
Abutter's names should be shown on the plan as in Fig.
16.3
. Sometimes the
topic and page of the abutter's deed is also shown. It is customary to show dashed
lines dividing the ownership of abutting properties, as in Fig.
16.3
. This differenti-
ates them from the locus boundary lines. Sometimes this would be obvious but
other times it is not. Abutting properties should usually not be dimensioned, unless
there is a clear reason for doing so. The surveyor was not retained by the abutter
so liability may be incurred. If a monument on an abutting property was used, the
surveyor should be careful to indicate that the dimensions from the locus to the
monument are labeled as tie lines so they will not be interpreted as boundary lines.
Streets should be labeled as
Public
or
Private
. The street width should also
be shown. If the width of the street varies or is unknown, the street can be labeled
Variable Width
. Figure
16.5
shows a convenient way to do this. If there is a
