GIS for Research and Data Management
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The document discusses the application of Geographic Information Systems (GIS) for data management and research, referencing key principles of spatial analysis, such as Tobler's first law of geography. It outlines an interface framework for suitability analysis, including considerations for various geographic constraints and opportunities, using operations inspired by set theory. Prominent themes include spatial disaggregation, overlay logic, and the importance of thoughtful design to mitigate issues like information overload.
GIS for Research and Data Management
- 1. GIS FOR DATA MANAGEMENT & RESEARCH WILLIAM RIGGS, PHD
- 2. "EVERYTHING IS RELATED TO EVERYTHING ELSE, BUT NEAR THINGS ARE MORE RELATED THAN DISTANT THINGS” - WALDO TOBLER, THE FIRST LAW OF GEOG, 1970 INTERFACE ANALYSIS STARTING POINTS
- 9. OVERLAY LOGIC ANALYSIS • Really doing spatial diss-agreggation / aggregation • Can do arithmetic and logical operations • Borrow form ‘set’ theory, where • a polygon can be thought of as representing a set • when two sets (polygons) A and B are overlaid, we have a graphic interpretation of the set concepts of intersection and union • the area of overlap of A and B is A.AND.B (intersection) • the combined area is A.OR.B (union)
- 11. STUDY GUIDES Constraints • Poor Slope Stability (Geology Select+Clip) • Streams (Buffer 600ft) • Soils (Clip Loam) • Vegetation - Tree Height (Query+Select; Early Mature+Mature) • Landslides • Faults (Buffer 100ft) • Union (All Constraints Composite) Opportunities • Roads (Buffer 100ft) • Campus Area (Clip + Select) • Clip (Roads+Roads Buffer) Composite • Delta • Proximity to Roads, BART • Massing and Land Area Opportunities
- 14. STARTING POINTS GIS FOR DATA MANAGEMENT & ANALYSIS
- 21. – EDWARD TUFTE “There is no such thing as information overload, only bad design.”