kopia lustrzana https://github.com/anitagraser/ogd-at-lab
Add webmapping intro to webservices
anitagraser
rodzic
b50fb6125b
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5db062d70e
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@ -139,3 +139,5 @@ notebooks/ZAEHLSPRGR0OGD.json
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notebooks/lumesakt.csv
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*.zip
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*.gpx
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/notebooks/data
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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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"# Welcome to the Mobile & Web Mapping Lab - Session 2!"
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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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"## Recap of session 1\n",
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"\n",
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"### Data collection & presentation as essential parts of geographic data science\n",
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"\n",
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"\n",
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"\n",
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"*Figure: Data science workflow (Graser & Dragaschnig 2020).*\n",
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"\n",
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"### Intro to webmapping \n",
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"\n",
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"\n",
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"\n",
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"\n",
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"*Figure: Typical web mapping architecture (Brovelli et al. 2013).*\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"<hr>"
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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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"## Session 2: Webmapping services - more than just maps in a browser\n",
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"\n",
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"**Today's goals**\n",
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"\n",
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"* Understanding different types of web map service standards\n",
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"* Exploring other useful non-standard service examples\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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" \n",
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"### 1. Tiles / basemaps\n",
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"\n",
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"**Use case:** Map background / geographic context\n",
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"\n",
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"**Standard:** Web Map Tile Services (WMTS) / XYZ Tiles\n",
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"\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"Basemap tiles are everywhere ...\n",
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"\n",
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"#### In desktop GIS, e.g. QGIS\n",
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"\n",
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"\n",
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"\n",
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"*Figure: OSM Tiles in QGIS*\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In web maps, e.g. Leaflet\n",
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"\n",
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"\n",
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"\n",
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"*Figure: OSM Tiles in Leaflet*\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In notebooks, e.g. Geoviews & Bokeh"
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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 holoviews as hv\n",
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"import geoviews as gv\n",
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"gv.extension('bokeh')\n",
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"\n",
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"basemap = hv.element.tiles.OSM().opts(width=450, height=450)\n",
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"basemap"
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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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"Documentation: http://geoviews.org/user_guide/Working_with_Bokeh.html\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>"
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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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"### 2. Raster maps\n",
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"\n",
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"**Use case:** Cartographic products (e.g. hillshades, topographic maps), map overlays ...\n",
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"\n",
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"**Standard:** Web Map Services (WMS) \n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In desktop GIS, e.g. QGIS\n",
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"\n",
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"\n",
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"\n",
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"*Figure: WMS layers in QGIS*\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In notebooks, e.g. Geoviews & Bokeh"
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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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"url = \"\"\"\n",
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"http://data.wien.gv.at/daten/geo?\n",
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"&service=WMS\n",
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"&request=GetMap\n",
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"&layers=ogdwien:DONAUINSPKTOGD\n",
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"&styles=\n",
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"&format=image/png\n",
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"&transparent=true\n",
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"&version=1.3.0\n",
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"&width=256\n",
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"&height=256\n",
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"&crs=EPSG:3857\n",
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"&bbox={XMIN},{YMIN},{XMAX},{YMAX}\n",
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"\"\"\"\n",
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"\n",
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"basemap = hv.element.tiles.OSM().opts(width=450, height=450)\n",
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"map_with_overlay = basemap * hv.Tiles(url, extents=(1825290,6144246,1827693,6146435))\n",
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"map_with_overlay"
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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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"url2 = \"\"\"\n",
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"http://data.wien.gv.at/daten/geo?\n",
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"&service=WMS\n",
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"&request=GetMap\n",
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"&layers=ogdwien:DONAUKILOMETEROGD\n",
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"&styles=\n",
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"&format=image/png\n",
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"&transparent=true\n",
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"&version=1.3.0\n",
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"&width=256\n",
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"&height=256\n",
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"&crs=EPSG:3857\n",
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"&bbox={XMIN},{YMIN},{XMAX},{YMAX}\n",
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"\"\"\"\n",
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"\n",
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"map_with_overlay * hv.Tiles(url2, extents=(1825290,6144246,1827693,6146435))"
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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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"Source: https://github.com/holoviz/geoviews/issues/481\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>"
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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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"### 3. Vector data\n",
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"\n",
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"**Use case:** Access to geometry and attribute data\n",
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"\n",
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"**Standard:** Web Feature Services (WFS) \n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In desktop GIS, e.g. QGIS\n",
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"\n",
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"\n",
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"\n",
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"*Figure: WFS layer in QGIS*\n",
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"\n",
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"<br/>\n",
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"<br/>\n",
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"<br/>\n",
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"\n",
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"#### In notebooks, e.g. Geoviews & Bokeh"
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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 geopandas as gpd\n",
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"from urllib.request import urlretrieve\n",
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"import hvplot.pandas\n",
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"\n",
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"layer = 'CITYBIKEOGD'\n",
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"file = f'data/{layer}.json'\n",
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"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",
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"urlretrieve(url, file)\n",
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"gdf = gpd.read_file(file)\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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"gdf.hvplot(geo=True, tiles='OSM', hover_cols=['STATION']).opts(active_tools=['wheel_zoom'])"
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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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"### 4. Other non-standard service examples\n",
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"\n",
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"1. [Geocoding addresses with Nominatim](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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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## References\n",
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"\n",
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"* Brovelli, M., Minghini, M., & Zamboni, G. (2013). Web–based Participatory GIS with data collection on the field–A prototype architecture. In Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings (Vol. 13, No. 1, p. 5).\n",
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"* Graser, A. & Dragaschnig, M. (2020). Open Geospatial Tools for Movement Data Exploration. KN ‒ Journal of Cartography and Geographic Information, 70(1), 3-10. doi:10.1007/s42489-020-00039-y."
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]
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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": "3.7.10"
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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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