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sources/03c dNBR.ipynb
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@ -7,19 +7,20 @@
"# Comparison of dNBR for three wild fires in 2018 and 2019\n",
"\n",
"This notebook contains the calculations necessary for mapping the burn severity of the previously selected products.\n",
"This burn severity is measured as the ${\\Delta}NBR$, which is defined as:\n",
"This burn severity is measured as the Normalized Burn Ratio (NBR).\n",
"The development of this burn ratio over time is described using the ${\\Delta}$NBR, which is defined as:\n",
"\n",
"$$\n",
"{\\Delta}NBR = NBR_\\text{pre-fire} - NBR_\\text{post-fire}\n",
"{\\Delta}\\text{NBR} = \\text{NBR}_\\text{pre-fire} - \\text{NBR}_\\text{post-fire}\n",
"$$\n",
"\n",
"Instead of only calculating values by overlaying different bands in one product, the ${\\Delta}NBR$ adds a time dimension to determine changes that have occured in the time span between the two chosen products.\n",
"Instead of only calculating values by overlaying different bands in one product, the ${\\Delta}$NBR adds a time dimension to determine changes that have occurred in the time span between the two chosen products.\n",
"\n",
"## Methodology\n",
"\n",
"The $NBR$ of the products downloaded in the previous notebook is calculated using the notebook [02 Spectral Indices](\"02 Spectral Indices.ipynb\").\n",
"These $NBR$ values are plotted side-by-side to get a visual impression of the changes that may have occured between two given dates.\n",
"The ${\\Delta}NBR$ is calculated and, if showing signs of burned areas, compared to data given by the responsible German ministries.\n",
"The NBR of the products downloaded in the previous notebook is calculated using the notebook [02 Spectral Indices](\"02 Spectral Indices.ipynb\").\n",
"These NBR values are plotted side-by-side to get a visual impression of the changes that may have occurred between two given dates.\n",
"The ${\\Delta}$NBR is calculated and, if showing signs of burned areas, compared to data given by the responsible German ministries.\n",
"\n",
"## Calculcations\n",
"### Setup"
@ -224,7 +225,7 @@
"source": [
"#### NBR plots\n",
"\n",
"We plot the $NBR$ values for all dates side by side to get a first visual impression of changes that have occured."
"We plot the NBR values for all dates side by side to get a first visual impression of changes that have occurred."
]
},
{
@ -283,7 +284,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Red dots mark the location of the evacuated villages, the background shows the calculated $NBR$ values, where areas with a low $NBR$ value are brighter and areas with a high NBR value are darker."
"Red dots mark the location of the evacuated villages, the background shows the calculated NBR values, where areas with a low NBR value are brighter and areas with a high NBR value are darker."
]
},
{