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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Perform scaling and mensuration of vertical and oblique aerial images 
SAQA US ID UNIT STANDARD TITLE
244511  Perform scaling and mensuration of vertical and oblique aerial images 
ORIGINATOR
SGB Air Defence 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 08 - Law, Military Science and Security Sovereignty of the State 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  8 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2007-08-16  2010-08-16  SAQA 0572/07 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2011-08-16   2014-08-16  

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 will enable qualifying learners to understand and utilise scaling and mensuration on analogue and digital images in different contexts such as earth observation, intelligence, geo-sciences, geohydrology, archaeology, mapping of watersheds and environmental management.

Qualifying learners will be able to:
  • Determine the scale of a vertical aerial image.
  • Determine the dimensions of objects on oblique aerial images.
  • Determining the dimensions including height and volume of objects displayed on vertical aerial image. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Map reading at NQF Level 4.
  • Mathematics at NQF Level 4. 
    		•

    UNIT STANDARD RANGE 
    Military, industry, environmental and Law Enforcement. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Determine the scale of a vertical aerial image. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Scaling equipment is used in measurements of features to determine exact image distance. 
    ASSESSMENT CRITERION RANGE 
    Scaling equipment refers to but not limited to proportional dividers, steel rulers, measuring magnifiers.
     

    ASSESSMENT CRITERION 2 
    Conversions between metric and imperial standards are done using standard conversion tables. 

    ASSESSMENT CRITERION 3 
    The scale on a vertical image is expressed in universal formats. 
    ASSESSMENT CRITERION RANGE 
    Universal formats of scale refer to Representative Fraction, Plain Statement and Line Scale.
     

    ASSESSMENT CRITERION 4 
    The scaling methods and its comparative formula are applied to determine the scale of vertical images. 
    ASSESSMENT CRITERION RANGE 
    Scaling methods include photo/map comparison, recognition and flying height/focal length method.
     

    SPECIFIC OUTCOME 2 
    Determine the dimensions of objects on oblique aerial images. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Scaling equipment is used in measurements of features to determine exact image distance. 
    ASSESSMENT CRITERION RANGE 
    Scaling equipment refers to but not limited to proportional dividers, steel rulers, measuring magnifiers.
     

    ASSESSMENT CRITERION 2 
    Oblique measuring methods are applied to determine exact feature dimensions. 
    ASSESSMENT CRITERION RANGE 
    Oblique measuring methods include Basic method, Alderton method and Graphic method.
     

    ASSESSMENT CRITERION 3 
    The principle of perspective is applied when conducting measurements of oblique photography. 

    SPECIFIC OUTCOME 3 
    Determine the dimensions including height and volume of objects displayed on vertical aerial image. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Mensuration equipment is used in measurements of features to determine exact image dimensions. 
    ASSESSMENT CRITERION RANGE 
    Mensuration equipment refers to but not limited to proportional dividers, steel rulers, measuring magnifiers.
     

    ASSESSMENT CRITERION 2 
    Objects on an image are measured to determine dimensions using the applicable formula. 
    ASSESSMENT CRITERION RANGE 
    Dimensions include distance, height, size and volume.
     

    ASSESSMENT CRITERION 3 
    Conversions between metric and imperial standards are done using standard conversion tables. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • An individual wishing to be assessed (including through RPL) against this Unit Standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, or an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Anyone assessing a learner against this Unit Standard must be registered as an assessor with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this Unit Standard or assessing this Unit Standard must be accredited as a provider with the relevant ETQA or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Moderation of assessment will be conducted by the relevant ETQA at its discretion. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Attributes, properties, characteristics related to:
  • Describe basic terminology used with oblique photography.
  • Define principle point as applied on oblique photography.
  • Define apparent horizon as applied on oblique photography.
  • Define principle vertical as applied on oblique photography.
  • Define true horizons as applied on oblique photography.
  • Define verticals as applied on oblique photography.
  • Define diagonals as applied on oblique photography.
  • Define parallels horizon as applied on oblique photography.
  • Define angle of depression as applied on oblique photography.

    Theory - rules, laws, principles:
  • Operate a simple stereoscope. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identifying and solving problems in which responses display that responsible decisions using critical and creative thinking have been made when:
  • Determining dimensions. 
    		•

    UNIT STANDARD CCFO WORKING 
    Working effectively with others as a member of a team, group, organisation, and community during:
  • Expressing the scale of a vertical image in a universal format. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organising and managing oneself and one's activities responsibly and effectively when:
  • Applying oblique methods. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collecting, analysing, organising and critically evaluating information to better understand and explain:
  • Determining the dimensions including height and volume of objects displayed on vertical aerial image. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Using science and technology effectively and critically, showing responsibility towards the environment and health of others when:
  • Using mensuration equipment in measurements of features to determine exact image dimensions. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrating an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation when:
  • Conversions between metric and imperial standards are done using standard conversion tables.
  • Performing scaling and mensuration of vertical and oblique aerial images. 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  58784   National Diploma: Geospatial Image Analysis  Level 5  NQF Level 05  Passed the End Date -
    Status was "Reregistered"     		 2020-07-30  As per Learning Programmes recorded against this Qual 


    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.