Raster Playground

A color playground for raster maps.

Why we made raster playground?

Raster manipulation (colorisation & clipping of tiles) is computationally heavy operation & not very feasible on the browser (frontend), thus we moved it to backend & then distributed by the CDN.

But this raised another challenge, how do we settle on the color schemes with backend, since the whole pipeline had to be rerun & old tiles purged? Earlier, we could just change the value & reload browser!

This utility helps simulate the color schemes quickly, along with clipping & map-styles you want to apply.

Features

• Raster color manipulation
• All state in url
• Monochromatic tiles URL as an input
• Clip as shape (for better visualisation)
  • Shape file through Url
  • Shape file through uploads (from local system)
  • Format available - TopoJson
  • More formats required (Geojson etc)
  • Auto fit to shape file location (on file load)
• Color selector
  • Add colors
  • Remove colors
  • Color ordering
  • Alpha color (0 - transparent)
  • Copy color in different format - HEX, RGBA, HSLA (JSON)
  • Download color format for ASE, GIMP/Inscape color scheme
• Mobile version
• Search bar to search places
• Go to current location
• Dark Mode

Installation

1. clone repo and install using -

npm install

2. How to generate environment variables for development - ref .env.example

Run on local

npm run start

Build project

npm run build

How to use

• Use chrome for better usability (Because initial stage of development)
• Add monochromatic tiles URL (XYZ format) eg - https://your-tiles-url/{z}/{x}/{-y}.png
• Add shape file URL (TopoJSON format)
• Add some colour pallet to visualise colors on raster map
• Add alpha (opacity) value (between 0-1)
• If you get the desired visualisation, you can copy RGBA (JSON) and use it to generate colour tiles from the backend or send the link to your colleague/friends to verify.

How to contribute

Read contribution here