kopia lustrzana https://github.com/anitagraser/ogd-at-lab
Add elevation notebook
anitagraser
rodzic
d575032ebb
commit
eabb98b0cb
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@ -129,3 +129,4 @@ dmypy.json
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.pyre/
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notebooks/CITYBIKEOGD.json
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notebooks/ELADESTELLEOGD.json
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notebooks/6141610.txt
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@ -0,0 +1,146 @@
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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Getting Elevation Info From the Austrian Elevation Service\n",
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"\n",
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"[](https://mybinder.org/v2/gh/anitagraser/ogd-at-lab/main?urlpath=lab/tree/notebooks/elevation.ipynb)\n",
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"\n",
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"Homepage of the service: https://maegger.github.io/getAustrianElevation.html (Copyright (c) 2017, Manfred Egger)\n",
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"\n",
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"Related QGIS plugin: https://github.com/maegger/AustrianElevation\n",
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"\n",
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"Elevation data source: CC BY 3.0 AT http://geoland.at/ \n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"import hvplot.pandas\n",
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"from geopy.geocoders import Nominatim\n",
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"from utils.ogc_io import gdf_from_wfs\n",
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"from utils.plotting import hvplot_with_buffer\n",
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"from utils.converting import location_to_gdf"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"address = \"Stephansdom, Wien\"\n",
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"locator = Nominatim(user_agent=\"myGeocoder\")\n",
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"location = locator.geocode(address)\n",
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"print(location.address)\n",
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"print(\"Latitude = {}, Longitude = {}\".format(location.latitude, location.longitude))\n",
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"gdf = location_to_gdf(location, address)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Before we can query the elevation, we need to reproject the coordinates to EPSG:3857"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"gdf = gdf.to_crs('epsg:3857')\n",
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"gdf"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"jupyter": {
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"source_hidden": true
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}
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},
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"outputs": [],
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"source": [
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"from os.path import exists\n",
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"from urllib.request import urlretrieve\n",
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"\n",
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"def get_elevation(point):\n",
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" \"\"\"\n",
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" Retrieve elevation info from the Austrian Elevation Service\n",
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" \n",
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" Implementation based on https://github.com/maegger/AustrianElevation/blob/6e0f468b6094caace6cd35f00704e4087e851cec/tree/AustrianElevation/AustrianElevation.py#L97\n",
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" \n",
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" Parameters\n",
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" ----------\n",
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" point : Shapely Point\n",
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" Point in EPSG:3857 \n",
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" \"\"\"\n",
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" x = point.x\n",
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" y = point.y\n",
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" mod_x_path = x % 20000;\n",
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" path_x = x - mod_x_path;\n",
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" database = int(path_x );\n",
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" mod_y = y % 10;\n",
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" raster_y = y - mod_y;\n",
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" mod_x = x % 10;\n",
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" raster_x = int(x - mod_x);\n",
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" file = f'{int(raster_y)}.txt'\n",
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" url = f\"https://raw.githubusercontent.com/maegger/{database}/master/{int(raster_y)}.txt\"\n",
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" if not exists(file):\n",
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" urlretrieve(url, file)\n",
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" data = open(file, 'r')\n",
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" for line in data:\n",
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" x_wert = int(line.split(' ', 1 )[0])\n",
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" if x_wert == raster_x:\n",
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" elevationall = line.split(' ', 1 )[1]\n",
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" return int(elevationall)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"gdf.loc[0, 'elevation'] = get_elevation(gdf.iloc[0].geometry)\n",
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"gdf"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.7.8"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 4
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}
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@ -4,7 +4,11 @@
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Geocoding addresses"
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"# Geocoding addresses\n",
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"\n",
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"[](https://mybinder.org/v2/gh/anitagraser/ogd-at-lab/main?urlpath=lab/tree/notebooks/geocoding.ipynb)\n",
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"\n",
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"Geocoding powered by [GeoPy](https://geopy.readthedocs.io/en/stable/) and [Nominatim](https://nominatim.org/release-docs/develop/api/Overview/)"
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]
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},
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{
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@ -13,13 +17,11 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"import pandas as pd\n",
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"import geopandas as gpd\n",
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"from shapely.geometry import Point\n",
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"import hvplot.pandas\n",
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"from geopy.geocoders import Nominatim\n",
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"from utils.ogc_io import gdf_from_wfs\n",
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"from utils.plotting import hvplot_with_buffer"
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"from utils.plotting import hvplot_with_buffer\n",
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"from utils.converting import location_to_gdf"
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]
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},
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{
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@ -57,9 +59,7 @@
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"metadata": {},
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"outputs": [],
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"source": [
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"geocoded_gdf = gpd.GeoDataFrame(pd.DataFrame([\n",
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" {'geometry': Point(location.longitude, location.latitude), 'address': address}\n",
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"])).set_crs('epsg:4326')"
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"geocoded_gdf = location_to_gdf(location, address)"
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]
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},
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{
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@ -19,7 +19,8 @@
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"## Lab notebooks\n",
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"\n",
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"1. [Accessing geodata from data.wien.gv.at services](wien-ogd.ipynb)\n",
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"1. [Geocoding addresses](geocoding.ipynb)"
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"1. [Geocoding addresses](geocoding.ipynb)\n",
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"1. [Getting elevation information](elevation.ipynb)"
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]
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}
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],
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@ -0,0 +1,19 @@
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import pandas as pd
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import geopandas as gpd
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from shapely.geometry import Point
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def location_to_gdf(location, address=None):
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"""
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Convert GeoPy Location to GeoPandas GeoDataFrame
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Parameters
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----------
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location : GeoPy.Location
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Location info to be used as the GeoDataFrame geometry
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address : string
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Optional address string to be stored in the GeoDataFrame column 'address'
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"""
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gdf = gpd.GeoDataFrame(pd.DataFrame([
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{'geometry': Point(location.longitude, location.latitude), 'address': address}
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])).set_crs('epsg:4326')
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return gdf
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@ -6,6 +6,9 @@
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"source": [
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"# Accessing Geodata from Data.wien.gv.at Services\n",
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"\n",
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"[](https://mybinder.org/v2/gh/anitagraser/ogd-at-lab/main?urlpath=lab/tree/notebooks/wien-ogd.ipynb)\n",
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"\n",
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"\n",
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"<a href=\"https://www.data.gv.at/auftritte/?organisation=stadt-wien\"><img align=\"right\" src=\"./img/stadt-wien.png\"></a>\n",
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"\n",
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"For more information on open government data in Vienna visit [digitales.wien.gv.at](https://digitales.wien.gv.at/site/open-data/)\n",
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