INSPIRE Polygons Downloader

Downloads and munges Land registry INSPIRE polygons so thay can be easily mapped and/or traversed.

Usage:

var downloader = require('inspirepolygonsdownloader')();
var options = {
    areas: ["Blaby", "Uttlesford"],
    fromDate: "2015-04-03",
    geoJson: true
};

downloader.download(options).then(function(data) {
    console.log(data);
});

Options:

areas

• Type: array of strings
• Required: Yes

The list of areas to download, should match the format of http://data.inspire.landregistry.gov.uk/{area}.zip.

fromDate

• Type: Date
• Required: No
• Default: null

To filter out the list of polygons according to the polygon's from date.

geoJson

• Type: Date
• Required: No
• Default: False

Whether or not to return the output in geo json format or as a plain array of polygon data (see below for more detail).

Returns:

download() returns a deferred. The deferred callback has one parameter, data, depending on the geoJson option this data is either geojson of polygons with the following additional properties:

• id - The Inspire Id.
• cadastralReference
• validFrom

If geoJson is false data is an array of objects, each object has the following members:

• id - The Inspire Id.
• geometry - An array of eastings and northings
• latLongs - An array of latitude/longitudes
• cadastralReference
• validFrom

Further information:

• Background about INSPIRE
• INSPIRE data - Conditions of use (can be found at the bottom of the page)
• OGL - Open Government Licence
• Movable Type - Convert between Latitude/Longitude & OS National Grid References - the key algorithm used to convert the GML to latatidue and longitude coordinates so it can be mapped.

Mapper:

github.com/robert-waggott/INSPIREPolygonsMapper is intended as a working example of how to use this package.