Apidays New York 2024 - Scaling API-first by Ian Reasor and Radu Cotescu, Adobe
Kush Defense
1. A Remote Sensing Study of the Urban Heat Island (UHI) Effect in the St. Louis Metropolitan Area, MO Kusumakar Bhusal
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3. Introduction Urban Heat Island (UHI) : Noticeable difference in temperature profile between the City and its outskirts Elevated air and surface temperatures in urban areas relative to surrounding suburban and rural areas (Solecki et al. 2005) Figure 1. Classic UHI Pattern in a City Area (Source – EPA 2006 )
4. Figure 2. The Urban Energy Budget Source: EPA 2006 SUN
39. Figure 17. Average Temperature Figure 18. Average NDVI Table 1. Summary Statistics of Average Temperature and NDVI for each Land-use Type Landuse Surface Temperature (Degree Celsius) NDVI Code Type Max. Min. Mean Std. Dev Max. Min. Mean Std. Dev. 1 Commercial 43 25 27.48 1.74 -0.39 0.13 -0.16 0.10 2 Residential 33 22 24.52 1.67 -0.64 0.58 0.08 0.16 3 Agricultural 27 21 22.43 0.78 0.63 -0.40 0.36 0.15 4 Forest 23 20 21.79 0.50 0.54 0.36 0.43 0.11 5 Water 23 21 22.50 0.56 -0.65 -0.26 -0.42 0.05
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42. Table 3. Correlation Between NDVI and Surface Temperature Correlation Analysis Negative Correlation existed between NDVI and land surface Temperature for all land-use types Land-use Land-use Correlation code Type Coefficient (r) 1 Commercial -0.56 2 Residential -0.30 3 Agricultural -0.25 4 Forest -0.50 5 Water -0.15
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Notas do Editor
Solar radiation incident on the urban surface is absorbed (by construction materials such as concrete, asphalt and cement) and then transformed to sensible heat. When the incoming short wave radiation strikes the surface, some portion of it is absorbed and emitted from the surface and the lower layers of air and clouds. The absorbed and later emitted radiation is called the long-wave radiation
Retrieval of surface brightness temperature: Digital Numbers (DN) of band 6 converted to radiance and then the effective at satellite temperature
Landsat has only a single window for thermal data it is difficult to obtain emissivity directly for TM / ETM data without using other spectral bands and/or ancillary data and assumptions (Li et. al 2004).
spatial distribution of the UHI encompassed both the City area and its surrounding suburbs. similar to the big City areas, smaller urban or suburban settings can also produce noticeable thermal effects when compared with surrounding rural environment.
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