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Understanding Cadaster and Raster Data in Geographic Information Systems

This article explores the foundations of cadaster and raster data within the realm of Geographic Information Systems (GIS). It delves into the distinction between cadaster and raster formats, addresses PLSS divisions, and touches on concepts like generalization, distance decay, and spatial autocorrelation. With a focus on applications, the piece also discusses relevant legal and ethical considerations, modeling techniques, and the importance of symbology in cartography. Furthermore, it examines the challenges of various data types, file formats, and uncertainties in representation.

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Understanding Cadaster and Raster Data in Geographic Information Systems

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Presentation Transcript

  1. Reading Focus • Cadaster: • Not a raster used in CAD • Not when the Cadberry bunny has an accident • PLSS divisions: • Not BLM, USGS, Forestry, • Not the Mississippi, State boundaries • Generalization • TINs • Distance Decay • Applications • Douglas-Poker • Spatial Autocorrelation • Types of symbology (maps, themes) • “Raster Data Capture” – Remote Sensing

  2. Additional Reading Focus • Cluster analysis • Modeling • Legal and ethical issues • SDI

  3. Review • Significant digits and ranges for various data types (number of bits) • Dimensions of the earth • File formats • Dealing with SRS’s • DD to DMS and back again • “Scale” • Historical figures • Generalization “rules”

  4. Review • Uncertainty • Raster size and how to deal with it • Vector analysis • Raster analysis • Cartography

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