The method of data collection mostly used in estimating the percentage of area occupied by green space are satellite imagery, aerial photography, or GIS mapping. Ground-truthing methods such as transects or quadrants are also used to measure the percentage of an area covered by vegetation.
Once the data is collected, several methods can be used to analyze the data and calculate the percentage of an area covered by green space. Some common methods include using a Normalized Difference Vegetation Index (NDVI) or calculating the Greenness Index. Also, a more sophisticated statistical method, such as regression analysis, can be used to model the relationship between green space and other variables.2,3
Cities with the most green space – World Atlas
The World Atlas conducted research to determine cities with an increasing population of areas occupied by green space. The research was conducted across several cities: Singapore, Moscow, Sydney, Vienna, and Shenzhen. The researchers suggested that large cities vary differently due to their sizes and the functionality performed by public parks and gardens. The findings of the study revealed that Moscow had the highest percentage (54%) of the area occupied by green space, while Shenzhen had the least percentage of the area occupied by green space. The research concluded that the availability of green space depends on the area occupied by green trees, which improves the green space.