Alignment of Old Survey to be verified.

34. In every case where a new survey is connected with an old one the
    surveyor shall range sufficient of the old boundary to verify the alignment
    thereof.

Datum of Survey to be described.

35. The datum upon which a survey is based shall be shown on the plan;
    if obtained by the adoption of an original boundary, the original marks
    found on it and the data by which they were identified shall be described
    in the field-book.

Limit of Angular Closure.

36. The angular closure of the points of intersections of all surveyed
    lines shall be shown. Should the error in closing exceed the undermentioned
    limits the work must be revised:

Rural surveys : 2 minutes of arc in open, level, or undulating country;
3 minutes of arc in bush or rough country.
City and town surveys : 20 seconds of arc in lines over 10 chains in
length; 90 seconds of arc in short lines.

Limiting Error of Lineal Closure.

37. Rural surveys: 2 links per mile in level and undulating country;
    4 links per mile in rough and hilly country.
    City and town surveys: 1 link per mile in level and undulating
    country; 2 links per mile in rough and hilly country.
    Should the work of a surveyor exceed the above-mentioned limits such
    survey must be revised. As accurate surveys and a high standard of work
    should be the first object of surveyors, they will be expected to obtain
    as nearly as possible a true closure, and the accumulated error shall not
    exceed 10 links.

Topographical Information to be obtained.

38. In every survey the position of all buildings, improvements, tracks,
    watercourses, &c., on or near the line of survey shall be noted and shown
    on the plan.

COMPUTATIONS.

Traverses to be co-ordinated on Initial Station.

39. All traverses executed by the surveyor are to be computed and
    co-ordinated in terms of the meridian and perpendicular of the initial
    station.

Connecting Triangle.

40. The calculation of a connecting triangle is to be made and recorded
    upon the printed form. The co-ordinates of all stations are to be reduced
    to the meridian and perpendicular of the initial station of the circuit.
    (See Appendix D.)

Repairs to Trigonometrical Stations.

41. Surveyors shall report to the Chief Surveyor all trigonometrical
    stations that are seen to be dilapidated, and surveyors engaged on
    Government work shall renew all stations that are out of repair, or
    report their inability to do so. All renewed stations are to retain the
    same letter or number as the originals.

Measurements to be checked by Closure.

42. The measurements made on each survey shall be checked by the
    calculation of the difference of latitude and departure of each line, computed
    to tenths of links for rural and to hundredths of links for town surveys.
    These computations must be kept up to date so that measurements do
    not get in advance of this mode of check.

Computations to be forwarded.

43. Calculation of closure on the authorized forms shall be dated and
    signed by the surveyor, and forwarded with the field-book and plans to
    which they refer. The number of the field-book and of the respective
    pages shall be shown in the proper column of the printed form. (See
    Appendix E.)

Areas by Double Longitudes.

44. Areas of portions or subdivisions, except such as are rectangular,
    shall be accurately computed by double longitudes on the authorized
    printed forms. (See Appendix F.)

Limit of Fractional Quantities in Areas.

45. After computing the exact areas of portions, modifications to avoid
    fractional quantities, not to exceed one-sixteenth per cent. less than the
    exact computed area may be made in areas of rural land.. The maximum
    number of perches by which a computed area may be modified is therefore
    equal to a tenth part of such area expressed in acres.