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

Apply image analysis techniques 
SAQA US ID UNIT STANDARD TITLE
244539  Apply image analysis techniques 
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 
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 apply image analysis techniques in different contexts such as earth observation, intelligence, geo-sciences, geohydrology, archaeology, mapping of watersheds and environmental management. Learners will be able to view imagery under stereo while applying scaling and mensuration. They will also be abele to use elimination techniques. This unit standard supports the application of interpretation methodology and will allow learners to use and apply these methodologies in various contexts.

Qualifying learners will be able to:
  • View imagery under stereo.
  • Apply scaling and mensuration skills on aerial photographs.
  • Apply elimination keys.
  • Apply interpretation methodology. 

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

  • UNIT STANDARD RANGE 
    Given situation may refer to but is not limited to structured scenario's case studies, role-plays, controlled scenes. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    View imagery under stereo. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The importance of stereo viewing is explained in terms of overlapping imagery. 

    ASSESSMENT CRITERION 2 
    The requirements for the formation of stereo viewing are explained using a three dimensional viewer. 

    ASSESSMENT CRITERION 3 
    Stereo vision is explained in terms of potential errors which may influence imagery viewing. 
    ASSESSMENT CRITERION RANGE 
    Errors refer to but is not limited to radio displacement, parallax, reverse stereo, pseudo stereo and non-stereo.
     

    SPECIFIC OUTCOME 2 
    Apply scaling and mensuration skills on aerial photographs. 
    OUTCOME RANGE 
  • Aerial photographs refer to vertical, oblique and panoramic.
  • Methods of scaling refers to but is not limited to include the photo map comparison, recognition method and flying height and focal length method. 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Objects on imagery are measured using measurement equipment. 
    ASSESSMENT CRITERION RANGE 
    Measuring equipment includes but not limited to measuring magnifier, dividers, rulers, stereoscope, parallax bar.
     

    ASSESSMENT CRITERION 2 
    Measurement units are converted between imperial and metric systems. 

    ASSESSMENT CRITERION 3 
    A vertical photograph is scaled for measurement purposes. 

    ASSESSMENT CRITERION 4 
    The scale of an image is stated using various expressions. 
    ASSESSMENT CRITERION RANGE 
    Various expressions include representative fraction, plain (word) statement and line scale.
     

    ASSESSMENT CRITERION 5 
    Height of objects on a vertical photograph is calculated using various methods. 
    ASSESSMENT CRITERION RANGE 
    Methods of calculating height refers to parallax method and the shadow factor method.
     

    ASSESSMENT CRITERION 6 
    The scale of an object on an oblique photograph is calculated using various methods. 
    ASSESSMENT CRITERION RANGE 
    Methods of scaling include basic method, Alderton method and the Graphic method.
     

    ASSESSMENT CRITERION 7 
    The height of an object on an oblique photography is determined using various methods. 
    ASSESSMENT CRITERION RANGE 
    Methods of measuring the height include the Z scale method, The McNeal method and the Katz approximation method.
     

    ASSESSMENT CRITERION 8 
    Panoramic photograph is measured using various methods. 
    ASSESSMENT CRITERION RANGE 
    Methods include X scale and Y scale.
     

    SPECIFIC OUTCOME 3 
    Apply image interpretation keys. 
    OUTCOME RANGE 
    Image interpretation keys include both elimination keys as well as selective keys. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Image interpretation keys are explained in terms of their significance during the interpretation process. 

    ASSESSMENT CRITERION 2 
    Image interpretation keys are applied in accordance with prescribed processes. 
    ASSESSMENT CRITERION RANGE 
    Prescribed processes refers to organization specific processes.
     

    SPECIFIC OUTCOME 4 
    Apply interpretation methodology. 
    OUTCOME NOTES 
    Application may be assessed in a given situation. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Interpretation methodology is described in terms of their elements. 
    ASSESSMENT CRITERION RANGE 
    Elements refer to identification, technical analysis, detection, recognition and interpretation.
     

    ASSESSMENT CRITERION 2 
    Interpretation methodology is applied to interpret an image. 

    ASSESSMENT CRITERION 3 
    Features on an image are annotated in accordance with the prescribed formats. 
    ASSESSMENT CRITERION RANGE 
    Prescribed formats refers to organization specific processes.
     

    ASSESSMENT CRITERION 4 
    The report on findings is quality assured by comparing it to existing reference material. 


    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 
    Methods of scaling:
  • Photo map comparison.
  • Recognition method.
  • Flying height and focal length method.
  • Single photo method.
  • Parallax method.
  • The shadow factor method.
  • Basic method.
  • Alderton method.
  • Graphic method.
  • Knowledge of the human ability to perceive binocular vision (stereovision).
  • Mathematical calculations such as percentage.
  • Operate a simple stereoscope.
  • Curvature of earth. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identifying and solving problems when interpreting information for image analysis purposes. 

    UNIT STANDARD CCFO WORKING 
    Working effectively with others as a member of a team, group, organisation, and community during interpretation for accuracy purposes. 

    UNIT STANDARD CCFO COLLECTING 
    Collecting, analysing, organising and critically evaluating information interpret given images. 

    UNIT STANDARD CCFO SCIENCE 
    Using science and technology when demonstrating the ability to calculate, using methods and equipment. 

    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  63589   National Diploma: Geographical Information Science  Level 5  NQF Level 05  Reregistered  2018-06-30  CETA 
    Core  58784   National Diploma: Geospatial Image Analysis  Level 5  NQF Level 05  Reregistered  2018-06-30  As per Learning Programmes recorded against this Qual 
    Elective  63689   Bachelor of Arts: Geographical Information Science  Level 6  Level TBA: Pre-2009 was L6  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.