Choropleth Generator

• Overview
• Build
• Infrastructure
  • Mapper.Scripts
  • Mapper.Web

Overview

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This work is based on Mike Bostock's Command-Line Cartography articles on Medium.

This repository represents my progress towards automating map-based visualizations for a .NET Core / Angular app stack. It builds on the initial efforts I've made in two other repositories.

mapping-research explored using a Windows command line to generate an equivalent map of Texas.

ps-mapping explored automating the process for any state using any compatible scheme.

Build

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In order to build this repository, you will need the following installed:

• .NET Core SDK
• Node.js - Current
• Yarn
• PowerShell Core

Additionally, you will need to globally install yarn packages on your machine using the following command:

yarn global add shapefile d3 d3-geo-projection d3-scale-chromatic ndjson-cli topojson-client topojson-server topojson-simplify

Infrastructure

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The core files necessary for generating maps are located in Mapper.Web/wwwroot/mapping. These files are used by a PowerShell script, executed via the Microsoft.PowerShell.SDK to generate the GeoJSON necessary to render the map.

Mapper.Scripts

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Contains classes, extension methods, and a PowerShell script for generating maps.

Key Files

• Create-Map.ps1
• ScriptExtensions.cs
• MapExtensions.cs

Mapper.Web

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ASP.NET Core / Angular SPA

Key Files

• MapController.cs
• map.service.ts
• home.component.ts
• home.component.html