4 Methodology
The key point of the proposed analysis is GIS
technology. GIS provides an effective mean to import,
manage and analyse spatially based data. The
methodology used in this work comprised of three
general steps (Fig. 3). Step 1 establishes the spatial
database of the study area as described previously.
Step 2 is dedicated on the reallocation of waste
collection bins with the use of GIS spatial analysis
functions. Finally, Step 3 consists of the waste
collection routing optimisation for minimum time,
distance, fuel consumption and gas emissions. The
waste collection optimisation model was developed
with the use of ArcGIS 9.2 Network Analyst (NA) GIS
software.