AW GIS presentation EEAE print

Information about AW GIS presentation EEAE print

Published on May 2, 2008

Author: Maria

Source: authorstream.com

Content

Slide1:  GIS : Introduction and Application for Environmental Health Studies Alan Willmore Senior Statistical Systems Officer Centre for Epidemiology and Research New South Wales Health Department Overview:  Overview GIS – an introduction GIS applications for environmental health Slide3:  Geographic Information System GIS handles SPATIAL information Information referenced by its location GIS makes connections based on spatial proximity Maps are just one product of a GIS A way to visualise analysis The objective: to improve decision making What is GIS ? Slide4:  GIS - a formal definition “A system for capturing, storing, checking, integrating, manipulating, analysing and displaying data which are spatially referenced to the Earth. This is normally considered to involve a spatially referenced computer database and appropriate applications software” Chorley Report, 1987 Slide5:  GIS concepts are not new ! London cholera epidemic - 1854 + Slide6:  GIS components Applications ? G I S Spatial data Computer hardware / software tools Slide7:  What makes data spatial ? Place name Postcode Distance & bearing Description Slide8:  Categories of spatial data Point GPS Street address Soil sample grid Line / Polyline AHS boundary Postcode boundary Road centreline Raster Aerial photograph Landsat-7 satellite imagery DEM Slide9:  Resolution of spatial data Scale is important 1:100,000 means 1cm = 1 kilometre Spatial resolution refers to the relative accuracy or precision of spatial data E.g. Landsat-7 satellite images have 30 metre cells Slide10:  GIS Software MapInfo Professional (demo) Vertical Mapper ESRI ArcGIS Spatial Analyst Geostatistical Analyst Manifold GRASS Free open source PostGIS Free open source Slide11:  Summary GIS handles SPATIAL information GIS is a valuable tool for managing and analysing environmental health datasets Don’t underestimate the time involved in obtaining data in the form you need Similar for learning how to use a GIS software package

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