top of page

Analysis and Geoprocessing tools

In this example scenario, I was tasked to conduct analysis using the 'Select by' tool and 'Buffer' tool for different planning purposes. I was provided by a base map of Singapore with subzones, census data and the location of polyclinics in Singapore.

 

1. Select by attribute

 

The first analysis was to find out which subzones had a population of more than 50,000 residents. To do so, I used the 'Select by attribute' tool. Using the operators AND and OR, multiple criteria can be combined in the selection. This tool could be used for example to decide which subzone to locate a new facility to benefit the most number of people.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Select by location

 

Using the 'select by location' tool, I could find out which subzones are a specified distance away from a facility. For example, in the figure below, I selected the subzones  which are within 1km away from a polyclinic. 

 

With the combination of these two tools, multiple criteria can be combined for a comprehensive planning exercise based on multiple attributes and locational criteria. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Buffer analysis

 

The buffer is under geoprocessing tools. It is different from analysis by selection as it produces new data, in the form of a buffer polygon. Using a multiple buffer tool with pre-determined buffer distances, it is easy to analyse the different facilities that are within a certain distance from each subzone. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

References:


GE2215 Lab 5 Manual by NUS Geography Department

 

 

 

bottom of page