Geospatial Models and Representations

Answer these questions as a self-assessment, and discuss any emerging questions with your peers and teachers:

• Which are the main layer types in the vector / feature data model?
• Why are snapping functions important for digitizing lines and polygons?
• How would you suggest to define 'spatial resolution' compared to 'accuracy' for line features?
• For defining a line feature layer, what steps are needed?
• Why is it important to define field (attribute) value domains?
• What is an indispensable requirement for a table join operation?
• ...

Suggestions for further practical exercises:

• Create a simple map of your campus by digitizing building blocks, green spaces and paved/traffic areas; walking paths and signs and ...
• Find other map and attribute data sets to practice a join operation, e.g. districts and municipalities in your country to be combined with census data.

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