Geographic Information Systems
Data Analysis

Mark Foley
mark.foley@dit.ie

Learning Objectives

Example questions for GIS analysis

Raster GIS measurements: (a) Pythagorean distance, (b) Manhattan distance, (c) proximity distances and (d) perimeter and area

Raster GIS measurements: (a) Pythagorean distance, (b) Manhattan distance, (c) proximity distances and (d) perimeter and area

House hunting case study: distance from office calculated using proximity method

House hunting case study: distance from office calculated using proximity method

Vector GIS measurements: (a) distance and (b) area

Vector GIS measurements: (a) distance and (b) area

Boolean operators: Venn diagrams

Boolean operators: Venn diagrams

Spatial Query(PostGIS examples)

select a.saps_label from localauthorities a, localauthorities b 
    where st_touches(a.the_geom, b.the_geom) 
    and b.saps_label like '%Kerry%';
 
select astext(the_geom), classdesc from archeology 
    where classdesc like '%Castle%';
Buffer zones around (a) point, (b) line and (c) area features

Buffer zones around (a) point, (b) line and (c) area features

House hunting case study: distance from office adjusted for road network

House hunting case study: distance from office adjusted for road network

Radioactive waste case study: 3 km buffer zones (blue) around the rail network (red)

Radioactive waste case study: 3 km buffer zones (blue) around the rail network (red)