Fig 1.
Geographical location of New Delhi (India) and study area (Satellite imagery source: The National Map; http://viewer.nationalmap.gov/viewer/).
Fig 2.
Spatial distribution of noise monitoring station on satellite imagery of Delhi City, India.
The red triangle symbol indicates noise monitoring stations. (Satellite imagery source: The National Map; http://viewer.nationalmap.gov/viewer/).
Table 1.
Description of noise monitoring stations.
Fig 3.
Spatial distribution of land use zones of study area.
The colors of the area correspond to different land use zones.Pink: Densely populated residential area;Red: Public and semipublic area; Green: Park, playground and street; Grey: Moderately populated area. A version of this figure with the original imagery is available from the authors.
Fig 4.
Position of SLM from the median and end of the road.
Table 2.
Noise monitoring location, date and time.
Fig 5.
Variation of maximum, equivalent and minimum noise level at noise monitoring site in day time.
Fig 6.
Variation of maximum, equivalent and minimum noise level at noise monitoring site in night time.
Fig 7.
2D & 3D Noise mapping of Ashram chowk.
The colors indicates the different noise zones.Blue: maximum noise level 75-80dB (A); Red: maximum noise level 70-74dB (A); Yellow:maximum noise level 65-70dB (A); Green: maximum noise level 60-65dB (A).A version of this figure with the original imagery is available from the authors.
Fig 8.
2D & 3D Noise mapping of Sabz Burj.
The colors indicates the different noise zones.Blue: maximum noise level 75-80dB (A); Red: maximum noise level 70-74dB (A); Yellow: maximum noise level 65-70dB (A); Green: maximum noise level 60-65dB (A).A version of this figure with the original imagery is available from the authors.
Fig 9.
2D & 3D Noise mapping of Loadhi road.
The colors indicates the different noise zones.Blue: maximum noise level 75-80dB (A); Red: maximum noise level 70-74dB (A); Yellow: maximum noise level 65-70dB (A); Green: maximum noise level 60-65dB (A). A version of this figure with the original imagery is available from the authors.
Fig 10.
2D & 3D Noise mapping of Lodhi road.
The colors indicates the different noise zones.Blue: maximum noise level 75-80dB (A); Red: maximum noise level 70-74dB (A); Yellow: maximum noise level 65-70dB (A); Green: maximum noise level 60-65dB (A). A version of this figure with the original imagery is available from the authors.
Fig 11.
Location of noise monitoring sensors for validation of 2D and 3D noise maps.
Table 3.
Validation of results for 2D and 3D noise mapping.