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[feature] Improve Guidance/Code snippet in "Web services" link #910

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mapninja opened this issue Nov 9, 2022 · 4 comments
Open

[feature] Improve Guidance/Code snippet in "Web services" link #910

mapninja opened this issue Nov 9, 2022 · 4 comments
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design needed

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@mapninja
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mapninja commented Nov 9, 2022

As a researcher who primarily works with Python/R/Leaflet, I would like a code snippet that I can use in my Python Notebook/RScript/Leaflet Map to make immediate use of the data I have discovered in Earthworks

We currently provide a link directly to the geoserver, and the WMS/WFS layer name, but no reference on how to make use of those? Preference would be to develop a set of boilerplate snippets to insert this info into for a more useful presentation of this info. Code snippets might provide cut-&-paste code for:

Python:

import geopandas as gpd
import requests
import geojson

# Specify the url for the backend. Here we are using data from Statistics Finland: https://www.stat.fi/org/avoindata/paikkatietoaineistot_en.html
url = 'http://geo.stat.fi/geoserver/vaestoruutu/wfs'

# Specify parameters (read data in json format).
# Available feature types in this particular data source: http://geo.stat.fi/geoserver/vaestoruutu/wfs?service=wfs&version=2.0.0&request=describeFeatureType
params = dict(service='WFS', version='2.0.0', request='GetFeature',
         typeName='vaestoruutu:vaki2017_5km', outputFormat='json')

# Fetch data from WFS using requests
r = requests.get(url, params=params)

# Create GeoDataFrame from geojson
data = gpd.GeoDataFrame.from_features(geojson.loads(r.content))

R:

https://inbo.github.io/tutorials/tutorials/spatial_wfs_services/

Leaflet JS (may need to enable the Jsonp in GeoServer):

<html>
  <head>
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.5.1/dist/leaflet.css">
    <style>
      #map {
        width: 100%;
        height: 500px;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script src="https://unpkg.com/leaflet@1.5.1/dist/leaflet.js"></script>
  </body>
</html>

<script>
var map = L.map("map").setView([38.45, 70.6], 6);
var osm = L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
  attribution:
    '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
//Geoserver Web Feature Service
$.ajax('http://localhost:8080/geoserver/wfs',{
  type: 'GET',
  data: {
    service: 'WFS',
    version: '1.1.0',
    request: 'GetFeature',
    typename: 'workspace:layer_name',
    CQL_FILTER: "column='demo'",
    srsname: 'EPSG:4326',
    outputFormat: 'text/javascript',
    },
  dataType: 'jsonp',
  jsonpCallback:'callback:handleJson',
  jsonp:'format_options'
 });
  //Geojson style file
  var myStyle = {
    'color': 'red'
  }
// the ajax callback function
function handleJson(data) {
    selectedArea = L.geoJson(data, {
      style: myStyle,
      onEachFeature: function(feature, layer) {
        layer.bindPopup(`Name: ${feature.properties.name_of_your_property}`)
      }
    }).addTo(map);
  map.fitBounds(selectedArea.getBounds());
}
</script>

Really nice example from Google Earth Engine Catalog:

https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LC08_C02_T1_L2
@thatbudakguy
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per @mapninja, Planet.com does this really well with its API links that allow you to copy/paste code snippets directly. we want stuff you can copy-paste and use immediately.

@thatbudakguy
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it seems like the simplest option would be to do this in a modal, similar to the web services links now.

@mapninja
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mapninja commented Nov 9, 2022

Planet does this pretty elegantly, in their Explorer interface with the API button and it's resulting widget:

Image

WHere the user's API Key, curl code and item IDs can be easily grabbed for programmatic access:

Image

@mapninja
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mapninja commented Nov 9, 2022

Google Earth Engine's Data Catalog is a "best in class" for this feature:

Image

@thatbudakguy thatbudakguy mentioned this issue Nov 28, 2022
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@thatbudakguy thatbudakguy mentioned this issue Jun 7, 2024
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