{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# How to draw a *scatter* plot with folium"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"import numpy as np\n",
"import sys\n",
"sys.path.insert(0, 'folium')\n",
"sys.path.insert(0, 'branca')\n",
"\n",
"import branca\n",
"import folium"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"We create a sample of data thanks to `numpy`."
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [],
"source": [
"n = 100\n",
"lats = np.random.uniform(38, 53, n)\n",
"lngs = np.random.uniform(-17, 23, n)\n",
"sizes = np.random.uniform(2, 20, n)\n",
"colors = np.random.uniform(0, 50, n)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"We create a colormap thanks to `branca`. You can also create your own function or use `matplotlib`."
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"#ffff00\n"
]
},
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"cm = branca.colormap.LinearColormap(['green', 'yellow', 'red'], vmin=0, vmax=50)\n",
"print(cm(25))\n",
"cm"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"We create a `FeatureGroup` with all the points."
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"f = folium.map.FeatureGroup()\n",
"\n",
"for lat, lng, size, color in zip(lats, lngs, sizes, colors):\n",
" f.add_child(\n",
" folium.features.CircleMarker(\n",
" [lat, lng],\n",
" radius=size,\n",
" color=None,\n",
" fill_color=cm(color),\n",
" fill_opacity=0.6)\n",
" )"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"And draw the map !"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"m = folium.Map([46,4], zoom_start=5, tiles='mapquestopen')\n",
"m.add_child(f)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"That's all folks !"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "prototyping",
"language": "python",
"name": "prototyping"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.5.1"
}
},
"nbformat": 4,
"nbformat_minor": 0
}