CCPC - Urban Heat Islands: Difference from Cuyahoga County Average (F)

PROCESSING STEPS: Cuyahoga County Planning Commission: Extracted Band 3: Difference from County Average LST of 92.4℉ Rounded to nearest degree difference Custom symbology applied Cleveland State University: Robert Moore, M.S. Candidate, Cleveland State University, Department of Biological, Geological and Environmental Sciences Raster CRS: EPSG:4326 Raster Width: 2214 Raster Height: 1324 Number of Bands: 3 Data Type: float64 NoData Value: None Pixel Size: 30m Data Sources: Landsat - USGS Landsat 8 Level 2, Collection 2, Tier 1 - https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LC08_C02_T1_L2 ST_B10 is band utilized to calculate LST MODIS - MOD11A1.061 Terra Land Surface Temperature and Emissivity Daily Global 1km - https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD11A1 LST_Day_1km is band utilized to calculate LST Data Processing: Satellite scenes were compiled and averaged for summer months May 1 - September 30 for a 3-year period 2021-2023. Scenes with greater than 20% cloud cover were omitted from analysis using the CFMASK algorithm for Landsat scenes. MODIS scenes all met “clear-sky criteria” built into the MODIS algorithm. We utilized MODIS LST data to address missing pixels within Landsat data for Cuyahoga County. Workflow: The following Python data packages were utilized: Rasterio, NumPy, and matplotlib (package documentation below). Statistical Linear Regression was conducted between Landsat and MODIS LST values (94% R2 value) to calculate predicted Landsat LST values from MODIS values. Then using a mask, missing pixels values are replaced with their corresponding predicted Landsat LST values. 1.26% of land area was missing in Landsat data and replaced using this method. https://pypi.org/project/rasterio/ https://pypi.org/project/numpy/ https://pypi.org/project/matplotlib/ Each band holds LST values. Celsius (Band 1), Fahrenheit (Band 2), and Urban Heat Island Severity or the difference between the Observed LST (in ℉) and the County Average LST of 92.4℉ (Band 3) Coverage: Cuyahoga County Update Frequency: As new data becomes available Last Update: August, 2024