8801 version 6

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Use contemporary software to carry out survey computations

Level / 4
Credits / 6

Purpose This unit standard is for people working, or who intend to work, in the surveying profession as a survey technician.

People credited with this unit standard are able to: set up a job using surveying software; calculate and adjust closures using surveying software; calculate boundaries and areas using surveying software; calculate joins and offsets using surveying software; calculate intersections and resections using surveying software; calculate volumes using surveying software; and calculate contours using surveying software.

Subfield / Surveying
Domain / Survey Practice
Status / Registered
Status date / 25 February 2008
Date version published / 25 February 2008
Planned review date / 31 December 2012
Entry information / Recommended: Unit 5251, Choose and apply trigonometric methods to solve problems involving lengths and angles, or demonstrate equivalent knowledge and skills.
Accreditation / Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) / Infrastructure ITO
Accreditation and Moderation Action Plan (AMAP) reference / 0101

This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.

Special notes

1 Calculations must comply with:

Surveyor-General’s Rules for Cadastral Survey 2002/2, Surveyor-General’s Rulings and Advisory Notes, published by Land Information New Zealand at http://www.linz.govt.nz; and

Accuracy Standards for Geodetic Surveys SG Standard 1, version 1.1 published by the Office of Surveyor-General, available at http://www.linz.govt.nz.

2 Documentation relevant to this unit standard includes:

job specifications;

software instructions.

3 To achieve credit for this unit standard, competency must be demonstrated using a contemporary software package that is capable of producing surveying computations.

4 Definitions

Job requirements take account of site conditions to meet contract specifications, and accord with procedures and work instructions written in quality manuals.

Workplace procedures refer to documented procedures specific to an enterprise which set out the quality management requirements for the business practice and activities of that enterprise.

Elements and performance criteria

Element 1

Set up a job using surveying software.

Performance criteria

1.1 A survey job is created and initialised in accordance with job specifications.

Range projection details, job headings, job details.

1.2 Data protection is instigated in accordance with workplace procedures and software instructions.

Range protection – auto-save configuration options, back-up.

1.3 Software parameters for traverse data entry are set to suit the type of data to be entered.

Range reduced or raw data, data rounding parameters, traverse misclosure tolerances.

1.4 Initial and closing coordinates are entered in accordance with software instructions.

1.5 Traverse bearings and distances are entered or downloaded in accordance with software instructions.

Element 2

Calculate and adjust closures using surveying software.

Performance criteria

2.1 Traverse is closed and adjusted in accordance with the Surveyor-General’s Ruling 2005/4.

Range bowditch or least squares.

2.2 Field errors are identified and isolated for field checking in accordance workplace procedures.

2.3 Traverse sheets are completed in accordance with the job specifications.

Element 3

Calculate boundaries and areas using surveying software.

Performance criteria

3.1 The area of a closed or adjusted polygon figure is calculated to specified tolerances in accordance with the Surveyor-General’s Rules.

3.2 Area calculations are carried out based on digitised boundary points in accordance with software instructions.

3.3 Bearings and distances are computed for joins between existing points to specified tolerances in accordance with the Surveyor-General’s Rules.

3.4 Gross error is identified by inspecting results in accordance with workplace procedures and software instructions.

Element 4

Calculate joins and offsets using surveying software.

Performance criteria

4.1 Perpendicular and parallel offsets relative to a reference line are computed in accordance with workplace procedures software instructions.

4.2 Bearing and distance data are extracted for the offset lines to specified tolerances in accordance with the Surveyor-General’s Rules.

4.3 Bearings and distance are checked in accordance with workplace procedures.

Element 5

Calculate intersections and resections using surveying software.

Performance criteria

5.1 Intersection points are computed from two known points in accordance with workplace procedures.

Range two bearings, one bearing and one distance, two distances.

5.2 Coordinates are checked in relation to the two known points in accordance with workplace procedures.

5.3 Coordinates are computed from directions observed to four or more known stations in accordance with workplace procedures.

5.4 Orientation bearings are computed from the calculated coordinates in accordance with known points and acceptable tolerances to the observed angles.

Range two or more known points.

5.5 Least squares calculation is checked in accordance with adjustment statistics.

Element 6

Calculate volumes using surveying software.

Range an earthworks cut and fill, a stock pile, a pond.

Performance criteria

6.1 Volumes are calculated between two surfaces from cross sections, prisms, and contours.

Element 7

Calculate contours using surveying software.

Performance criteria

7.1 Breaklines are established which join points along abrupt changes in terrain.

7.2 A triangle mesh is created between all points and checked for accuracy in accordance with job requirements.

7.3 Contours are smoothed and labelled in accordance with workplace procedures.

Please note

Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact Infrastructure ITO if you wish to suggest changes to the content of this unit standard.

Ó New Zealand Qualifications Authority 2014