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Support custom prj #54

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09f4e5b
Do not put a folder in zip to improve interoperability
Jun 12, 2017
08f785d
Support custom .prj
Jun 15, 2017
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12 changes: 10 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,8 @@ Or in a browser
```js
var shpwrite = require('shp-write');

// (optional) set names for feature types and zipped folder
// (optional) set names for feature types
var options = {
folder: 'myshapes',
types: {
point: 'mypoints',
polygon: 'mypolygons',
Expand Down Expand Up @@ -67,6 +66,15 @@ shpwrite.download({
// triggers a download of a zip file with shapefiles contained within.
```

## Custom .prj file
To pass a custom [WKT string](http://www.opengeospatial.org/standards/wkt-crs) in the .prj file to define a different projection the prj option can be used:

```js
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]]'
}
```

## API

### `download(geojson)`
Expand Down
14 changes: 7 additions & 7 deletions src/zip.js
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
var write = require('./write'),
geojson = require('./geojson'),
prj = require('./prj'),
defaultPrj = require('./prj'),
JSZip = require('jszip');

module.exports = function(gj, options) {

var zip = new JSZip(),
layers = zip.folder(options && options.folder ? options.folder : 'layers');
var zip = new JSZip();
var prj = (options && options.prj) ? options.prj : defaultPrj;

[geojson.point(gj), geojson.line(gj), geojson.polygon(gj)]
.forEach(function(l) {
Expand All @@ -20,10 +20,10 @@ module.exports = function(gj, options) {
l.geometries,
function(err, files) {
var fileName = options && options.types[l.type.toLowerCase()] ? options.types[l.type.toLowerCase()] : l.type;
layers.file(fileName + '.shp', files.shp.buffer, { binary: true });
layers.file(fileName + '.shx', files.shx.buffer, { binary: true });
layers.file(fileName + '.dbf', files.dbf.buffer, { binary: true });
layers.file(fileName + '.prj', prj);
zip.file(fileName + '.shp', files.shp.buffer, { binary: true });
zip.file(fileName + '.shx', files.shx.buffer, { binary: true });
zip.file(fileName + '.dbf', files.dbf.buffer, { binary: true });
zip.file(fileName + '.prj', prj);
});
}
});
Expand Down