Writes shapefile in pure javascript. Uses dbf for the data component, and jsZIP to generate ZIP file downloads in-browser.
For node.js or browserify
npm install --save shp-write
Or in a browser
https://unpkg.com/shp-write@latest/shpwrite.js
- Requires a capable fancy modern browser with Typed Arrays support
- Geometries: Point, PointZ, MultiPoint, MultiPointZ, LineString, LineStringZ, Polygon, PolygonZ, MultiLineString, MultiPolygon
- Tabular-style properties export with Shapefile's field name length limit
- Uses jsZip for ZIP files, but compression is buggy so it uses STORE instead of DEFLATE.
var shpwrite = require('shp-write');
// (optional) set names for feature types
var options = {
types: {
point: 'mypoints',
polygon: 'mypolygons',
line: 'mylines'
}
}
// a GeoJSON bridge for features
shpwrite.download({
type: 'FeatureCollection',
features: [
{
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [0, 0]
},
properties: {
name: 'Foo'
}
},
{
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [0, 10]
},
properties: {
name: 'Bar'
}
}
]
}, options);
// triggers a download of a zip file with shapefiles contained within.
To pass a custom WKT string in the .prj file to define a different projection the prj option can be used:
var options = {
prj: 'PROJCS["Amersfoort / RD New",GEOGCS["Amersfoort",DATUM["D_Amersfoort",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Stereographic_North_Pole"],PARAMETER["standard_parallel_1",52.15616055555555],PARAMETER["central_meridian",5.38763888888889],PARAMETER["scale_factor",0.9999079],PARAMETER["false_easting",155000],PARAMETER["false_northing",463000],UNIT["Meter",1]]'
}
Given a GeoJSON FeatureCollection as an object, converts convertible features into Shapefiles and triggers a download.
Given data, an array of objects for each row of data, geometry, the OGC standard
geometry type (like POINT
), geometries, a list of geometries as bare coordinate
arrays, generate a shapfile and call the callback with err
and an object with
{
shp: DataView(),
shx: DataView(),
dbf: DataView()
}
Generate a ArrayBuffer of a zipped shapefile, dbf, and prj, from a GeoJSON object.
- Nick Baugh niftylettuce@gmail.com