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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Demonstrate an understanding of different visual variables used on maps 
SAQA US ID UNIT STANDARD TITLE
258654  Demonstrate an understanding of different visual variables used on maps 
ORIGINATOR
SGB Geographical Information Sciences 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 12 - Physical Planning and Construction Physical Planning, Design and Management 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 6  Level TBA: Pre-2009 was L6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard has been developed for the GIS occupational area and is intended for persons who aim to achieve career advancement by gaining GIS skills leading to a qualification based on unit standards. A person who has successfully completed this unit standard will be able to produce an appropriate thematic map.

A person credited with this unit standard is able to:
  • Demonstrate the use of different visual variables with point data.
  • Demonstrate the use of different visual variables with line data.
  • Demonstrate the use of different visual variables with polygon data.
  • Demonstrate the use of different charts. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that learners are already competent in terms of the following:
  • Communication at NQF Level 5.
  • Mathematical Literacy at NQF Level 5. 

  • UNIT STANDARD RANGE 
    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate the use of different visual variables with point data. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Size of point symbol is used to represent the magnitude of an attribute. 
    ASSESSMENT CRITERION RANGE 
    Ordinal, Interval, Ratio data.
     

    ASSESSMENT CRITERION 2 
    Symbol shape is used to differentiate between point attribute values. 
    ASSESSMENT CRITERION RANGE 
    Nominal data.
     

    ASSESSMENT CRITERION 3 
    Symbol orientation is used to indicate directional attributes. 

    SPECIFIC OUTCOME 2 
    Demonstrate the use of different visual variables with line data. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The line width is used to differentiate between line attribute values that differ in magnitude. 
    ASSESSMENT CRITERION RANGE 
    Interval or Ratio data.
     

    ASSESSMENT CRITERION 2 
    The line style is used to differentiate between line attribute values. 
    ASSESSMENT CRITERION RANGE 
    Nominal or Ordinal data.
     

    ASSESSMENT CRITERION 3 
    Colour hue is used to differentiate between line attribute values. 
    ASSESSMENT CRITERION RANGE 
    Interval or Ratio data.
     

    ASSESSMENT CRITERION 4 
    Colour saturation is used to differentiate between line attribute values. 
    ASSESSMENT CRITERION RANGE 
    Interval or Ratio data.
     

    ASSESSMENT CRITERION 5 
    Colour value is used to differentiate between line attribute values. 
    ASSESSMENT CRITERION RANGE 
    Interval or Ratio data.
     

    ASSESSMENT CRITERION 6 
    Combinations of at least three visual variables are used to differentiate between three different line attribute values. 

    SPECIFIC OUTCOME 3 
    Demonstrate the use of different visual variables with polygon data. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Areas are filled with symbols which are varied in size in order to demonstrate magnitude of area attributes. 
    ASSESSMENT CRITERION RANGE 
    Ordinal data.
     

    ASSESSMENT CRITERION 2 
    Areas are filled with symbols which are varied in shape in order to demonstrate different area attributes. 
    ASSESSMENT CRITERION RANGE 
    Nominal data.
     

    ASSESSMENT CRITERION 3 
    Areas are filled with textured lines and offset patterns in order to demonstrate different area attributes. 
    ASSESSMENT CRITERION RANGE 
    Nominal data and Ordinal data. Interval and ratio data are used to determine offsets between hatch lines.
     

    ASSESSMENT CRITERION 4 
    Areas are filled with lines orientated differently in order to demonstrate different area attributes. 
    ASSESSMENT CRITERION RANGE 
    Nominal data and Ordinal data.
     

    ASSESSMENT CRITERION 5 
    Areas coloured with different colour hues in order to demonstrate different area attributes. 

    ASSESSMENT CRITERION 6 
    Area entities are coloured with different levels of colour saturation in order to demonstrate differences in associated attributes. 

    ASSESSMENT CRITERION 7 
    Areas coloured with different colour values in order to demonstrate different area attributes. 

    ASSESSMENT CRITERION 8 
    In order to demonstrate differences areas are filled with symbols or dots which are varied in density according to attribute values. 

    SPECIFIC OUTCOME 4 
    Demonstrate the use of different charts. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Pie charts are understood and added to maps. 

    ASSESSMENT CRITERION 2 
    Bar charts are understood and added to maps. 

    ASSESSMENT CRITERION 3 
    Normalization is understood in relation to field value charts. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard. 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Solve problems. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team/group/organisation or community. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself and one`s activities responsibly and effectively. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, organise and critically evaluate information. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematics and language skills in the modes of oral and written presentations. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically (showing responsibility towards the environment and health of others). 

    UNIT STANDARD CCFO DEMONSTRATING 
    Display an understanding of the world as a set of related systems. 

    UNIT STANDARD CCFO CONTRIBUTING 
    Contribute to the full development of each learner and the social and economic development of society at large. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Notes to Assessors:
  • See Robinson, A.H. et al, 1995, Elements of Cartography, 6th edition. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  63589   National Diploma: Geographical Information Science  Level 5  NQF Level 05  Reregistered  2023-06-30  CETA 
    Core  63689   Bachelor of Arts: Geographical Information Science  Level 6  Level TBA: Pre-2009 was L6  Passed the End Date -
    Status was "Reregistered" 
    2018-06-30   
    Elective  63711   Bachelor of Geographical Information Science (GISc)  Level 7  NQF Level 07  Passed the End Date -
    Status was "Reregistered" 
    2018-06-30   


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.