Country-Japan

100%

✓ Published1🌍 Public

Last edited Mar 26, 2023

Created on Mar 26, 2023

This example visualizes a simplified map of Japan using a Mercator projection. A slider controls the level of topological simplification, filtering out geographic features based on a triangle-area threshold computed with `topojson.presimplify`. The map is rendered as an SVG path using `d3.geoPath` with a custom `d3.geoTransform` stream that converts simplified coordinates to pixel positions via `projection.fitExtent`. The code redraws the map on slider input and window resize events.

AI-generated description

MIT Licensed

Similar vizzes

Loading thumbnail…

Japan Country

This example displays a map of Japan rendered as SVG paths, with a slider controlling the level of topographic simplification. The visualization uses a TopoJSON dataset of Japan, which is converted to GeoJSON via `topojson.feature` and then processed with `topojson.presimplify` to compute area-based simplification weights. A `d3.geoTransform` custom stream applies a threshold filter, and `d3.geoPath` projects the filtered coordinates using a Mercator projection fitted to the viewport. The slider triggers redraws that dynamically show coarser or finer terrain detail, with a header reading “Japan Map.”

Ttejasviprasad06@gmail.com

92% match

Loading thumbnail…

Fork of Japan Country

This example shows a simplified map of Japan, rendered as an aquamarine SVG path with black outlines. A slider controls the level of simplification, removing smaller geographic details in real time as the threshold increases. The visualization uses D3 v4's `d3.geoMercator` projection, `d3.geoPath`, and `d3.geoTransform` with TopoJSON's `presimplify` to filter points based on their triangular area. The map data comes from a remote TopoJSON file of Japan, and the canvas resizes dynamically with the window.

Yyasmeenha

89% match

Loading thumbnail…

Fork of Japan Country

This example visualizes the Japan country shape as an interactive SVG map, where a slider controls the level of terrain simplification by filtering out triangular areas below a threshold. The map redraws dynamically on slider input and window resize, using topojson.presimplify to precompute simplification weights and d3.geoTransform with d3.geoPath to project only points meeting the threshold. The code loads geographic data from a remote TopoJSON file and applies a Mercator projection via d3.geoMercator, rendering the result as green-filled paths with black strokes.

Yyasmeenha

89% match

Loading thumbnail…

Japan Country

This example displays a choropleth of Japan, rendered as an SVG path using the d3.geoPath projection. The visualization shows the country’s terrain, dynamically simplified based on a user-adjusted threshold slider, which filters out triangular areas below the set value. Built with d3.v4 and topojson, it loads GeoJSON data from a remote GitHub source and re-renders the map on slider input or window resize, using the d3.geoTransform for custom simplification.

VVishnu Sudireddy

87% match

Loading thumbnail…

Japan Country

This map of Japan renders land areas as aquamarine shapes with black outlines, using a Mercator projection. The visualization uses topojson data fetched from a GitHub gist, with TopoJSON APIs (`topojson.presimplify`, `topojson.feature`) for simplification and conversion to GeoJSON. It applies D3’s `d3.geoTransform` to filter polygon details based on a threshold, which is adjustable via a range slider, and draws paths with `d3.geoPath` onto an SVG canvas. The map redraws dynamically when the slider changes or the window resizes.

Hhappymail6

86% match

Loading thumbnail…

Japan Country

This interactive map of Japan visualizes geographic regions as SVG paths, rendered with the Mercator projection. Users can adjust a range slider to simplify the map topology in real time, controlling the level of detail through a custom geoTransform filter that removes small areas. The visualization is built with d3.js v4, the topojson library for converting TopoJSON to GeoJSON, and d3.geoPath for generating path data. Hovering over a region displays its name in a tooltip and highlights it in light green.

SSheela2930

86% match

Loading thumbnail…

Japan Map

This example displays a map of Japan using a Mercator projection, rendered as an SVG path with a violet fill that transitions to light blue on hover. It loads geographic data from the world-atlas TopoJSON dataset, extracts Japan’s geometry via `topojson.feature`, and fits the projection to the country’s bounds using `d3.geoMercator().fitSize`. The visualization applies `d3.zoom` for interactive pan and zoom, and uses `d3.json` to fetch the data asynchronously.

HHarshithaAmbilpur

85% match

Loading thumbnail…

Fork of Japan Country

This interactive map displays a simplified, green-colored rendering of Japan with yellow borders. A slider controls the level of topographic simplification, filtering out smaller details as the threshold increases. Built with D3.js v4 and TopoJSON, the visualization uses a custom `d3.geoTransform` pipeline to convert GeoJSON features into SVG paths. The `presimplify` function and a user-adjustable threshold dynamically alter the geometry’s complexity, with the map redrawing on input or window resize using the `d3.geoPath` projection. Data originates from a remote TopoJSON file hosted on GitHub.

Rradhadevarapu

83% match