Gallery / Maps & spatial

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Maunga Whau as simple features

Three closed height rings of an Auckland volcano, each carried as one GeoJSON polygon in a geometry column rather than a table of vertices.

Maunga Whau as simple features

Source

Svelte, builder, JSON

<script lang="ts">
  import {
    CoordFixed,
    GeomSf,
    GGPlot,
    Labs,
    ScaleFillContinuous,
    ThemeClassic,
  } from "@ggsvelte/svelte";

  import { heightRings } from "./data.js";
</script>

<GGPlot data={heightRings} aes={{ fill: "height" }} width={640} height={400}>
  <ThemeClassic />
  <CoordFixed />
  <ScaleFillContinuous scheme="viridis" />
  <Labs
    title="Maunga Whau as three simple features"
    subtitle="The ground above 130, 140 and 150 metres, one GeoJSON polygon per row"
    fill="Metres"
  />
  <GeomSf alpha={0.55} linewidth={0.9} />
</GGPlot>

Meta

Details

Family
Maps & spatial
Source
sf/basic
Rendering
SVG
Techniques

sf · geojson · polygon · fill · map · geom