@webgeodatavore/geojson.terminator
v1.0.2
Published
GeoJSON Night and day regions on Earth
Downloads
4,829
Readme
GeoJSON Terminator
Create a GeoJSON of overlay day and night regions. It's derivated from Leaflet-Terminator project
Demo
You can see a demo in action using OpenLayers
It generates a 'pseudo-GeoJSON'.
Why 'pseudo'?
Coordinates longitude range go from -360 to 360 whereas it should be -180, + 180
API like OpenLayers or Leaflet can consume this GeoJSON although it's invalid from the GeoJSON spec viewpoint.
If you need a valid GeoJSON in another context, you may use something like GDAL/OGR to clip GeoJSON to a valid range with:
ogr2ogr -f "GeoJSON" output.geojson input.geojson \
-clipsrc -180 90 180 90
Usage
With OpenLayers standalone build
var geoJSON = new GeoJSONTerminator();
var timeLayer = new ol.layer.Vector({
source: new ol.source.Vector({
features: (new ol.format.GeoJSON()).readFeatures(geoJSON, {
featureProjection: 'EPSG:3857'
})
}),
style: new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgb(0, 0, 0)'
}),
stroke: null
}),
opacity: 0.5
});
map.addLayer(timeLayer);
With npm
// At the beginning
import VectorLayer from 'ol/layer/Vector';
import VectorSource from 'ol/source/Vector';
import GeoJSON from 'ol/format/GeoJSON';
import Style from 'ol/style/Style';
import Stroke from 'ol/style/Stroke';
import Fill from 'ol/style/Fill';
import GeoJSONTerminator from "@webgeodatavore/geojson.terminator";
// Then after map instanciation
const geoJSON = new GeoJSONTerminator();
const timeLayer = new VectorLayer({
source: new VectorSource({
features: (new GeoJSON()).readFeatures(geoJSON, {
featureProjection: 'EPSG:3857'
})
}),
style: new Style({
fill: new Fill({
color: 'rgb(0, 0, 0)'
}),
stroke: null
}),
opacity: 0.5
});
map.addLayer(timeLayer);