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Creating a Vector GIS Database.docx

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York University
Earth, Space Science and Engineering
ESSE 3600

Creating a Vector GIS Database Refer to diagram Spatial Models A spatial model is a conceptualization. Perception is subjective, and conceptual models are formalized models to represent the real world. Ie physical description, spatial description How can we digitize and convert what we have? How can the flat Google Images map be conceptualized to show 3D? ie fire at Petrie Science Building From the real world to the physical model, we have ONE DATA SHAPEFILE. If we look at the vertical axis and degree of simplifications, it is high at the bottom level on the flowchart. Geographical data is never organized. Note that object-based models deal with descriptive data, and field based models deal with points and arbitrary locations. The inexact boundary has to be generated to become a more exact boundary. Field based raster, object based raster. Measurement uncertainty needs to be modelled in data. The road can be
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