School of Geography FACULTY OF ENVIRONMENT Raster GIS

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