school of geography faculty of environment raster gis
TRANSCRIPT
School of GeographyFACULTY OF ENVIRONMENT
Raster GIS
School of GeographyFACULTY OF ENVIRONMENT
Introduction
Programme
• Day 1:
• Introduction to raster modelling in ArcGIS
• Practical exercise #1: comparing raster and vector data models
• Point-surface interpolation
• Practical extercise #2: interpolating point data in ArcGIS
• Cartographic modelling
• Practical exercise #3: modelling in ArcGIS and Grid
• Day 2:
• Digital elevation models
• Practical exercise #4: terrain analysis in ArcGIS and grid
Safety, etc.
• Fire alarm and exits
• Toilets
• Tea and coffee
• Lunch
Day 1: Introduction to raster
• Prior experience with raster and vector data models?
• Basics of raster model
• Grids and cells, rows and columns
• Points, lines, areas, surfaces and images
• Binary, categorical and continuous data types
• Resolution and orientation (generalisation)
• Topology
• Typical data sources
• Vector to raster conversion
• Satellite and aerial imagery
• DEMs by direct measurement
• Point-surface interpolation
Prior experience?
• Vector GIS in ArcGIS and MapInfo?
• Familiarity with basic GIS concepts
• Familiarity with ArcGIS and ArcMap interface
• Raster GIS?
• ArcGIS, ArcView, MapInfo Vertical Mapper, Idrisi, GRASS, etc.
• Image processing software (e.g. ERDAS Imagine, PCI, etc.)
• Microsoft Excel (or any other spreadsheet software)
• Digital photography and image management/editing software
Basics of raster data model
• Grids and cells, rows and columns...
Basics of raster data model
• Feature types:
• Points, lines and areas
Basics of raster data model
• Feature types:
• Networks and surfaces
Basics of raster data model
• Feature types:
• Images
Basics of raster data model
• Data types:
• Continuous (a), categorical (b), image (c)
Basics of raster data model
• Data types:
• Binary (demonstration of raster file structures)
Basics of raster data model
• Resolution and orientation (generalisation)
Basics of raster data model
• Topology
• Vector to raster conversion
Data sources
• Vector to raster conversion – topological mismatch
Data sources
Data sources
• Satellite and aerial imagery
Data sources
• DEMs (Digital Elevation Models) by direct measurement
• Point-surface interpolation
Data sources
Points Surface
Querying in ArcMap
Hands-on Exercise #1Comparing raster and vector data models