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Small corrections for Time Series and Spectral Indices

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heyarne 2021-03-18 16:29:35 +00:00
commit 76599830ba
2 changed files with 6 additions and 4 deletions
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5
sources/02c-time-series.ipynb
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@ -367,7 +367,6 @@
"\n", "\n",
"ncols = 5\n", "ncols = 5\n",
"fig, axs = plt.subplots(nrows=math.ceil(len(output_files) / ncols), ncols=ncols, figsize=(18,18))\n", "fig, axs = plt.subplots(nrows=math.ceil(len(output_files) / ncols), ncols=ncols, figsize=(18,18))\n",
"plt.suptitle('Visualization of NDVI in 2019')\n",
"fig.tight_layout(h_pad=2)\n", "fig.tight_layout(h_pad=2)\n",
"axs = axs.flatten() \n", "axs = axs.flatten() \n",
"\n", "\n",
@ -387,9 +386,11 @@
] ]
}, },
{ {
"cell_type": "markdown", "cell_type": "raw",
"metadata": {}, "metadata": {},
"source": [ "source": [
"The above plot is given as an impression of plant health development in the area of interest for the entire year. \n",
"\n",
"## Average NDVI\n", "## Average NDVI\n",
"\n", "\n",
"The average NDVI over the area is calculated using a multiprocessing pool.[^performance_comparison]\n", "The average NDVI over the area is calculated using a multiprocessing pool.[^performance_comparison]\n",

5
sources/02d-spectral-indices.ipynb
View file

@ -19,7 +19,8 @@
" - nbr -- normalized burn ratio\n", " - nbr -- normalized burn ratio\n",
" - ndvi -- normalized difference in vegetation\n", " - ndvi -- normalized difference in vegetation\n",
" - ndwi -- normalized difference in water\n", " - ndwi -- normalized difference in water\n",
"- `fill_value`, the value which is used to represent invalid pixels to handle division by zero.\n", "\n",
"The formulas for the indices below are ported from versions [provided by Sentinel Hub](https://custom-scripts.sentinel-hub.com/custom-scripts/sentinel-2/indexdb/), which implements indices listed in the [Index DataBase](https://www.indexdatabase.de/).\n",
"\n", "\n",
"When running this notebook interactively, _Kernel → Restart and Run All Cells_ can be used to re-evaluate all cells in this notebook after configuring the pipeline.\n", "When running this notebook interactively, _Kernel → Restart and Run All Cells_ can be used to re-evaluate all cells in this notebook after configuring the pipeline.\n",
"The path of the output file containing the processed values will be printed below the last cell.\n", "The path of the output file containing the processed values will be printed below the last cell.\n",
@ -181,7 +182,7 @@
" bands = set()\n", " bands = set()\n",
" for element in formula:\n", " for element in formula:\n",
" if type(element) == tuple:\n", " if type(element) == tuple:\n",
" # recur for subformulas\n", " # recur for sub-formula\n",
" for band in get_bands(element):\n", " for band in get_bands(element):\n",
" bands.add(band)\n", " bands.add(band)\n",
" elif type(element) == str:\n", " elif type(element) == str:\n",