geocanvas: beta version

Functions for Working with GeoSpatial Canvas Elements

install

npm install geocanvas

basic usage

`js import { maskCanvas } from 'geocanvas';

// this function is mutable // modifying the original canvas maskCanvas({ // required // an HTML Canvas Element canvas,

// required // bounding box of the canvas // as [xmin, ymin, xmax, ymax] // or [west, south, east, north] canvas_bbox: [7698736.857788673, 163239.83797837645, 10066450.245949661, 1325082.6679127468],

// required // spatial reference system of the canvas image canvas_srs: 3857,

// optional canvas_pixel_height: 2445.98490512499,

// optional canvas_pixel_width: 2445.98490512499,

// required // a GeoJSON Feature, FeatureCollection, Polygon, or MultiPolygon mask: { type: "FeatureCollection", features: [ /* ... */ ] },

// required // spatial reference system of the mask geometry mask_srs: 4326,

// optional parameter // accepts "outside" or "inside" // default is outside // choose whether to make the inside or outside // of the mask geometry transparent strategy: "outside" });