From 5b0ec40bda1296d38b235b5c598adf718c8e6c70 Mon Sep 17 00:00:00 2001
From: anitagraser <anitagraser@gmx.at>
Date: Sat, 7 Oct 2023 15:00:27 +0200
Subject: [PATCH] add panel app

---
 apps/panel-test.ipynb  | 125 +++++++++++++++++++++++++++++++++++++++++
 binder/environment.yml |   2 +-
 2 files changed, 126 insertions(+), 1 deletion(-)
 create mode 100644 apps/panel-test.ipynb

diff --git a/apps/panel-test.ipynb b/apps/panel-test.ipynb
new file mode 100644
index 0000000..2163e9b
--- /dev/null
+++ b/apps/panel-test.ipynb
@@ -0,0 +1,125 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9f6a6099-ce19-4c11-9dd3-191a8aab35d5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from os.path import exists\n",
+    "from urllib.request import urlretrieve\n",
+    "import geopandas as gpd\n",
+    "import pandas as pd\n",
+    "import hvplot.pandas\n",
+    "\n",
+    "from holoviews import opts\n",
+    "opts.defaults(opts.Overlay(active_tools=['wheel_zoom'], frame_width=500, frame_height=400))\n",
+    "\n",
+    "import warnings\n",
+    "warnings.filterwarnings('ignore')\n",
+    "\n",
+    "def get_gdf_from_wfs(layer):\n",
+    "    \"\"\"\n",
+    "    Get geopandas.GeoDataFrame from data.wien.gv.at WFS service based on layer name\n",
+    "    \n",
+    "    Parameters\n",
+    "    ----------\n",
+    "    layer : string\n",
+    "        WFS layer name \n",
+    "    \"\"\"\n",
+    "    file = f'{layer}.json'\n",
+    "    url = f\"https://data.wien.gv.at/daten/geo?service=WFS&request=GetFeature&version=1.1.0&typeName=ogdwien:{layer}&srsName=EPSG:4326&outputFormat=json\"\n",
+    "    if not exists(file):\n",
+    "        try:\n",
+    "            urlretrieve(url, file)\n",
+    "        except:\n",
+    "            from pyodide.http import open_url\n",
+    "            url_contents = open_url(url)\n",
+    "            file = url_contents.read()\n",
+    "    return gpd.read_file(file)\n",
+    "\n",
+    "def plot_with_buffer(gdf, buffer_size, *args, **kwargs):\n",
+    "    \"\"\"\n",
+    "    Convenience function for plotting a GeoPandas point GeoDataFrame using point markers plus buffer polygons\n",
+    "    \n",
+    "    Parameters\n",
+    "    ----------\n",
+    "    gdf : geopandas.GeoDataFrame\n",
+    "        point GeoDataFrame to plot\n",
+    "    buffer_size : numeric\n",
+    "        size of the buffer in meters (measured in EPSG:31287)\n",
+    "    \"\"\"\n",
+    "    buffered = gdf.to_crs('epsg:31287').buffer(buffer_size)\n",
+    "    buffered = gdf.copy().set_geometry(buffered).to_crs('epsg:4326')\n",
+    "    \n",
+    "    plot = ( buffered.hvplot(geo=True, tiles='OSM', alpha=0.5, line_width=0, *args, **kwargs) * \n",
+    "      gdf.hvplot(geo=True, hover_cols='all') \n",
+    "    ).opts(active_tools=['wheel_zoom'])\n",
+    "    \n",
+    "    #plot = buffered.explore(height=500)\n",
+    "    #plot = gdf.explore(m=plot)\n",
+    "    \n",
+    "    return plot\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ae0d7813-1f97-467c-8590-8dcad78a843a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import panel as pn\n",
+    "\n",
+    "pn.extension(sizing_mode=\"stretch_width\", template=\"fast\")\n",
+    "pn.state.template.param.update(site=\"Panel in the Browser\", title=\"Data.Wien.gv.at Viewer\")\n",
+    "\n",
+    "wfs_layer = pn.widgets.TextInput(name=\"WFS Layer (e.g. RADGRAETZELOGD, SCOOTERABSTELLOGD, ...): \", \n",
+    "                                 value=\"RADGRAETZELOGD\")\n",
+    "buffer_size = pn.widgets.IntSlider(start=100, end=1000, name=\"Buffer size (meters)\")\n",
+    "\n",
+    "def pipeline(wfs_layer, buffer_size):\n",
+    "    gdf = get_gdf_from_wfs(wfs_layer)\n",
+    "    return plot_with_buffer(gdf, buffer_size)\n",
+    "\n",
+    "pn.Column(\n",
+    "    \"For a full list of WFS layers, see https://www.data.gv.at/auftritte/?organisation=stadt-wien&formatFilter%5B0%5D=WFS\",\n",
+    "    wfs_layer,\n",
+    "    \"Move the slider below to change the buffer size\",\n",
+    "    buffer_size,\n",
+    "    pn.bind(pipeline, wfs_layer, buffer_size),\n",
+    ").servable()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a328dd5a-6961-43c1-9f02-9827de3e03a6",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/binder/environment.yml b/binder/environment.yml
index 531a23e..7cfae61 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - default
 dependencies:
-  - python=3.7
+  - python=3.10
   - numpy
   - cython
   - matplotlib