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billion · « Je devais travailler sur une plateforme SIG intégrant des traitements d’images satellite, un domaine que je ne connaissais pas du tout mais auquel j’ai rapidement pris goût »

function polygonStyle(feature) {
  const clicked = feature.get("clicked");

  let color;

  if (clicked) {
    color = "yellow";
  } else {
    color = "blue";
  }

  return {
    fill: color,
  };
}
feature.set("clicked", true);

featureCollection.updateStyles();
function extrusionOffset(feature) {
    const height = feature.get('height');

    return height;
}

const entity = new FeatureCollection({
    ...
    extrusionOffset,
    ...
});
import VectorSource from 'ol/source/Vector';
import GeoJSON from 'ol/format/GeoJSON.js';
import {bbox as bboxStrategy} from 'ol/loadingstrategy.js';
import VectorLayer from 'ol/layer/Vector';

const GEOSERVER_BASE_URL = 'http://localhost:8600/geoserver/dev';

// create geoserver generic vector features layer
const featureSource = new VectorSource({
  format: new GeoJSON(),
  url: function (extent) {
    return (
      GEOSERVER_BASE_URL + '/ows?service=WFS&' +
      'version=1.0.0&request=GetFeature&typeName=dev%3Ageneric&maxFeatures=50&' + 
      'outputFormat=application%2Fjson&srsname=EPSG:3857&' +
      'bbox=' +
      extent.join(',') +
      ',EPSG:3857'
    );
  },
  strategy: bboxStrategy,
});

const featureLayer = new VectorLayer({
  source: featureSource,
  style: {
    'stroke-width': 0.75,
    'stroke-color': 'white',
    'fill-color': 'rgba(100,100,100,0.25)',
  },
});

// react
import React, {  useEffect, useRef } from 'react';
import Map from 'ol/Map'

function MapWrapper(props) {

  // refs are used instead of state to allow integration with 3rd party map onclick callback;
  //  these are assigned at the end of the onload hook
  //  [https:]   const mapRef = useRef();
  const mapElement = useRef();
  const featuresLayerRef = useRef();

  // other logic removed for brevity

  // react onload hook
  useEffect( () => {

    // create map
    const map = new Map({
      // config removed for brevity
    })

    // save map and featureLary references into React refs
    featuresLayerRef.current = featureLayer;
    mapRef.current = map

  },[])

  return (      
    <div>
      <div ref={mapElement} className="map-container"></div>
    </div>
  ) 

}

export default MapWrapper

import WFS from 'ol/format/WFS';
import GML from 'ol/format/GML32';

const GEOSERVER_BASE_URL = 'http://localhost:8600/geoserver/dev';

// map click handler - uses state and refs available in closure
const handleMapClick = async (event) => {

  // get clicked feature from wfs layer
  // TODO: currently only handles a single feature
  const clickedCoord = mapRef.current.getCoordinateFromPixel(event.pixel);
  const clickedFeatures = featuresLayerRef.current.getSource().getFeaturesAtCoordinate(clickedCoord);
  if (!clickedFeatures.length) return; // exit callback if no features clicked
  const feature = clickedFeatures[0];

  // parse feature properties
  const featureData = JSON.parse(feature.getProperties()['data']);

  // iterate prop to test write-back
  if (featureData.iteration) {
    ++featureData.iteration;
  } else featureData.iteration = 1;

  // set property data back to feature
  feature.setProperties({ data: JSON.stringify(featureData) });
  console.log('clicked updated feature data', feature.getProperties())

  // prepare feature for WFS update transaction
  //  [https:]   const wfsFormatter = new WFS();
  const gmlFormatter = new GML({
    featureNS: GEOSERVER_BASE_URL,
    featureType: 'generic',
    srsName: 'EPSG:3857' // srs projection of map view
  });
  var xs = new XMLSerializer();
  const node = wfsFormatter.writeTransaction(null, [feature], null, gmlFormatter);
  var payload = xs.serializeToString(node);

  // execute POST
  await fetch(GEOSERVER_BASE_URL + '/wfs', {
    headers: new Headers({
      'Authorization': 'Basic ' + Buffer.from('admin:myawesomegeoserver').toString('base64'),
      'Content-Type': 'text/xml'
    }),
    method: 'POST',
    body: payload
  });

  // clear wfs layer features to force reload from backend to ensure latest properties
  //  are available
  featuresLayerRef.current.getSource().refresh();

  // display updated feature data on map
  setFeatureData(JSON.stringify(featureData));
}

>>> src.read()
rasterio._err.CPLE_AppDefinedError: TIFFFillTile:Read error at row 512, col 0, tile 3; got 38232 bytes, expected 47086

The above exception was the direct cause of the following exception:

rasterio._err.CPLE_AppDefinedError: TIFFReadEncodedTile() failed.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "rasterio/_io.pyx", line 968, in rasterio._io.DatasetReaderBase._read
    io_multi_band(self._hds, 0, xoff, yoff, width, height, out, indexes_arr, resampling=resampling)
  File "rasterio/_io.pyx", line 207, in rasterio._io.io_multi_band
    with stack_errors() as checker:
  File "rasterio/_io.pyx", line 213, in rasterio._io.io_multi_band
    return checker.exc_wrap_int(retval)
  File "rasterio/_err.pyx", line 307, in rasterio._err.StackChecker.exc_wrap_int
    raise last
rasterio._err.CPLE_AppDefinedError: /app/tests/data/corrupt.tif, band 1: IReadBlock failed at X offset 1, Y offset 1: TIFFReadEncodedTile() failed.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "rasterio/_io.pyx", line 650, in rasterio._io.DatasetReaderBase.read
    out = self._read(indexes, out, window, dtype, resampling=resampling)
  File "rasterio/_io.pyx", line 971, in rasterio._io.DatasetReaderBase._read
    raise RasterioIOError("Read or write failed. See context for details.") from cplerr
rasterio.errors.RasterioIOError: Read or write failed. See context for details.

// Mont-Blanc
const coordinates = new Coordinates('EPSG:4326', 6.864594, 45.833641);

const elevationResult = map.getElevation({ coordinates });
if (result.samples.length > 0) {
    result.samples.sort((a, b) => a.resolution - b.resolution);

    const best = result.samples[0];
    const elevation = best.elevation;

    console.log(`Elevation for coordinate: ${elevation} m`);
}
const coordinates = new Coordinates('EPSG:4326', 6.864594, 45.833641);

const result = { samples: [], coordinates: options.coordinates };

for (const map of allMaps) {
    map.getElevation({ coordinates }, result);
}

if (result.samples.length > 0) {
    result.samples.sort((a, b) => a.resolution - b.resolution);

    const best = result.samples[0];
    const elevation = best.elevation;

    console.log(`Best sample for coordinate: ${elevation} m`);
}
const labelObject = new CSS2DObject(/** options */);

// Mont-Blanc
const coordinates = new Coordinates('EPSG:4326', 6.864594, 45.833641).as('EPSG:3857');

labelObject.position.setX(coordinates.x);
labelObject.position.setY(coordinates.y);

// ... After elevation query on the coordinates

labelObject.position.setZ(elevation);
function updateLabels(extent) {
    // Code
}

map.addEventListener('elevation-changed', ({ extent }) => updateLabels(extent));
This list is now closed, join us on geoserver developer forum: [https:] 
docker pull docker.osgeo.org/geoserver:2.27.x
docker run -it -p8081:8080 docker.osgeo.org/geoserver:2.27.x

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