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Quarto output
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MartinSchobben committed Aug 15, 2024
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4 changes: 2 additions & 2 deletions notebooks/01_classification.ipynb
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"metadata": {},
"source": [
"### False Color Image\n",
"In addition to the regular RGB Image, we can swap any of the bands from the visible spectrum with any other bands. In this specific case the red band has been changed to the near infrared band. This allows us to see vegetated areas more clearly, since they now appear in a bright red color. This is due to the fact that plants absorb regular red light while reflecting near infrared light {cite}`nasa2020`."
"In addition to the regular RGB Image, we can swap any of the bands from the visible spectrum with any other bands. In this specific case the red band has been changed to the near infrared band. This allows us to see vegetated areas more clearly, since they now appear in a bright red color. This is due to the fact that plants absorb regular red light while reflecting near infrared light {cite:p}`nasa2020`."
]
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"metadata": {},
"source": [
"### NDVI Image\n",
"To get an first impression of the data, we can calculate the NDVI (Normalized Difference Vegetation Index) and plot it. The NDVI is calculated by useing the following formula. {cite}`rouse1974monitoring`\n",
"To get an first impression of the data, we can calculate the NDVI (Normalized Difference Vegetation Index) and plot it. The NDVI is calculated by useing the following formula. {cite:p}`rouse1974monitoring`\n",
"\n",
"$$\n",
"NDVI = \\frac{NIR - Red}{NIR + Red}\n",
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8 changes: 4 additions & 4 deletions notebooks/02_floodmapping.ipynb
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"source": [
"## From Backscattering to Flood Mapping\n",
"\n",
"This notebook explains how microwave ($\\sigma^0$) backscattering (@fig-area) can be used to map the extent of a flood. We replicate in this exercise the work of @bauer-marschallinger_satellite-based_2022 on the TU Wien Bayesian-based flood mapping algorithm.\n",
"This notebook explains how microwave ($\\sigma^0$) backscattering can be used to map the extent of a flood. We replicate in this exercise the work of {cite:t}`bauer-marschallinger_satellite-based_2022` on the TU Wien Bayesian-based flood mapping algorithm.\n",
"\n",
"In the following lines we create a map with EOmaps {cite}`quast_getting_2024` of the $\\sigma^0$ backscattering values."
"In the following lines we create a map with EOmaps {cite:p}`quast_getting_2024` of the $\\sigma^0$ backscattering values."
]
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"$$P(NF|\\sigma^0)P(\\sigma^0) = P(\\sigma^0|NF)P(NF).$$\n",
"\n",
"\n",
"The forward probability of $\\sigma^0$ given the occurrence of flooding ($P(\\sigma^0|F)$) and $\\sigma^0$ given no flooding ($P(\\sigma^0|NF)$) can be extracted from past information on backscattering over land and water surfaces. As seen in the sketch below (@fig-sat), the characteristics of backscattering over land and water differ considerably.\n",
"The forward probability of $\\sigma^0$ given the occurrence of flooding ($P(\\sigma^0|F)$) and $\\sigma^0$ given no flooding ($P(\\sigma^0|NF)$) can be extracted from past information on backscattering over land and water surfaces. As seen in the sketch below , the characteristics of backscattering over land and water differ considerably.\n",
"\n",
"![Schematic backscattering over land and water. Image from [Geological Survey Ireland`(https://www.gsi.ie/images/images/SAR_mapping_land_water.jpg)`(https://www.gsi.ie/images/images/SAR_mapping_land_water.jpg){#fig-sat}\n",
"![Schematic backscattering over land and water. Image from [Geological Survey Ireland](https://www.gsi.ie/images/images/SAR_mapping_land_water.jpg)](https://www.gsi.ie/images/images/SAR_mapping_land_water.jpg){#fig-sat}\n",
"\n",
"## Likelihoods\n",
"\n",
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