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Question / Vraag 4 [12] A GIS analyst is analysing gully erosion data collecte...
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Question / Vraag 4 [12]
A GIS analyst is analysing gully erosion data collected from 120 field sites.
The attribute table contains:
- Gully_ID
- Area_m²
- Soil_Type
- Severity_Class
- Survey_Date
4.1 (3)
Identify the most appropriate data type for:
- Area_m²
- Severity_Class
- Survey_Date
4.2 (3)
Explain the difference between mean and median values.
Why may the median sometimes better represent environmental datasets?
4.3 (3)
Describe TWO common attribute data errors that may occur in GIS databases.
4.4 (3)
Explain how joins and table relationships can improve GIS analysis.
’n GIS-ontleder analiseer data oor geul-erosie wat by 120 veldterreine versamel is.
Die attribuuttabel bevat:
· Gully_ID
· Area_m²
· Soil_Type
· Severity_Class
· Survey_Date
4.1 (3)Identifiseer die mees geskikte datatipe vir:
• Area_m²
• Severity_Class
• Survey_Date
4.2 (3)Verduidelik die verskil tussen gemiddelde (mean) en mediaanwaardes.Waarom kan die mediaan soms ’n beter voorstelling van omgewingsdatastelle wees?
4.3 (3)Beskryf TWEE algemene attribuutdatfoute wat in GIS-databasisse kan voorkom.
4.4 (3)Verduidelik hoe koppelings (joins) en tabelverhoudings GIS-analise kan verbeter.