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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Perform spatial and hybrid queries 
SAQA US ID UNIT STANDARD TITLE
258795  Perform spatial and hybrid queries 
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 7  Level TBA: Pre-2009 was L7  12 
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 qualification based on unit standards. A person who has successfully completed this unit standard will have an understanding of how to perform spatial and hybrid GIS queries.

A person credited with this unit standard is able to:
  • Create and execute a vector spatial query.
  • Create and execute a raster spatial query.
  • Create and execute a combination of spatial queries.
  • Create and execute hybrid. 

  • 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 outcomes or areas of learning when starting to learn towards this unit standard:
  • Skills and competencies associated with core unit standards required for GISc Operator level.
  • Basic alphanumeric queries. 

  • UNIT STANDARD RANGE 
    The following scope and context applies to the whole unit standard:
  • Re-categorisation, Overlay, Booleans, Buffering.

    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 
    Create and execute a vector spatial query in terms of the following range. 
    OUTCOME RANGE 
    Identify, buffer, coincidence, adjacency, proximity, measurement, intersection, union, overlay, containment. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Queries are created, executed and stored for identifying and measuring feature instances in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Including but not limited to identify query, Euclidean distance.
     

    ASSESSMENT CRITERION 2 
    Queries are created, executed and stored under supervision for coincidence, adjacency, containment and intersection feature instances in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Point; line; polygon.
     

    ASSESSMENT CRITERION 3 
    Queries are created, executed and stored under supervision for buffering and proximity feature instances in terms following of the range. 
    ASSESSMENT CRITERION RANGE 
    Single buffer of point, line and polygon; identify feature instances within a specified distance from point, line or polygon.
     

    ASSESSMENT CRITERION 4 
    Union and overlay queries for identifying and measuring feature instances are created, executed and stored under supervision for feature instances in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Point, line, polygon.
     

    SPECIFIC OUTCOME 2 
    Create and execute a raster spatial query. 
    OUTCOME RANGE 
    Identify pixels, position of pixel, filters, edge detection. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Pixel position and band value(s) are determined in order to create and execute a simple raster spatial query in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Image coordinates, projected coordinates.
     

    ASSESSMENT CRITERION 2 
    Simple filters are applied to single images under supervision to create and execute a simple raster spatial query in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Filter size (3x3, 5x5); smoothing filters (mean, moving spatial average, mode, average); edge-detection filters; etcetera.
     

    ASSESSMENT CRITERION 3 
    Queries for binary buffering of raster data are created, executed and stored under supervision in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Queen's case, rook's case.
     

    ASSESSMENT CRITERION 4 
    Raster data is overlaid to create and execute a simple raster spatial query under supervision in terms of the following range. 
    ASSESSMENT CRITERION RANGE 
    Addition, subtraction, multiplication, division.
     

    SPECIFIC OUTCOME 3 
    Create and execute a combination of spatial queries. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Multiple simple vector queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 2 
    Multiple simple raster queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 3 
    Combined simple vector and raster queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 4 
    Boolean queries are created, executed, stored and used to combine selection queries under supervision. 

    SPECIFIC OUTCOME 4 
    Create and execute hybrid queries. 
    OUTCOME RANGE 
    Alphanumeric, spatial. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Combined simple alphanumeric and simple vector queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 2 
    Combined simple alphanumeric and simple raster queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 3 
    Combined simple alphanumeric, simple vector and simple raster queries are created, executed and stored under supervision. 

    ASSESSMENT CRITERION 4 
    Shading and draping techniques are performed under supervision. 


    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 is dealt with under the specific outcomes section where "Demonstrate Knowledge and Understanding" is required. 

    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 
    Terminology:
  • Hybrid: A composite of mixed origin (both alphanumeric and spatial data).
  • Spatial data: Both raster and vector. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Fundamental  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.