Gridviz is a JavaScript library for visualizing gridded data (or any tabular dataset with x/y coordinates for that matter) in the browser using a large variety of cartographic styles and techniques. Unlike traditional raster-based web mapping tools, Gridviz renders everything client-side, on the fly.
Visit the style gallery to see the different customisable styles available for visualizing gridded data with gridviz.
npm install gridviz
then
import * as gridviz from 'gridviz'
Or you can cherry-pick only the modules that you need, for example:
import { App, SquareColorWGLStyle } from 'gridviz'
Hereโs a basic example that loads a CSV file of a European population grid (5km resolution):
let myApp = new gridviz.App(containerDiv)
//set position and zoom
.setGeoCenter({ x: 4500000, y: 2900000 })
.setZoomFactor(3000)
//add CSV layer
.addCSVGridLayer(
//data URL
'https://raw.githubusercontent.com/eurostat/gridviz/master/assets/csv/Europe/pop_2018_5km.csv',
//resolution, in CRS unit (m)
5000,
//the style
[
new gridviz.SquareColorWGLStyle({
//the CSV column to show
colorCol: 'Population',
//value to [0,1] mapping function
tFun: (value) => gridviz.sExp(Math.min(value / 100000, 1), -15),
}),
]
)
See the documentation page for more information.
<script src="https://unpkg.com/gridviz/dist/gridviz.min.js"></script>
See the gridviz documentation page.
In order to visualize large grids efficiently, you can produce tiled grids in a tiled grid format with GridTiler.
ย | ย |
---|---|
contributors | ![]() ![]() |
version | See npm |
status | Since 2020 |
license | EUPL 1.2 |
Feel free to ask support, fork the project or simply star it (itโs always a pleasure).
The Eurostat NUTS dataset is copyrighted. There are specific provisions for the usage of this dataset which must be respected. The usage of these data is subject to their acceptance. See the Eurostat-GISCO website for more information.
The designations employed and the presentation of material on these maps do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Kosovo: This designation is without prejudice to positions on status, and is in line with UNSCR 1244/1999 and the ICJ Opinion on the Kosovo declaration of independence. Palestine: This designation shall not be construed as recognition of a State of Palestine and is without prejudice to the individual positions of the Member States on this issue.