https://github.com/openaddresses/esri-dump

A Node module to assist with pulling data out of an ESRI ArcGIS REST server into GeoJSON.
https://github.com/openaddresses/esri-dump

Last synced: about 2 months ago
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A Node module to assist with pulling data out of an ESRI ArcGIS REST server into GeoJSON.

• Host: GitHub
• URL: https://github.com/openaddresses/esri-dump
• Owner: openaddresses
• License: mit
• Created: 2014-03-19T16:27:21.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2023-11-08T18:23:13.000Z (11 months ago)
• Last Synced: 2024-04-14T08:32:49.738Z (5 months ago)
• Language: TypeScript
• Homepage:
• Size: 491 KB
• Stars: 80
• Watchers: 13
• Forks: 22
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
esri-dump


A Node module to assist with pulling data out of an ESRI ArcGIS REST server into GeoJSON or ImageryURLs


Based On [PyEsriDump](http://github.com/openaddresses/pyesridump) by [@iandees](https://github.com/iandees)

## Install

```sh

npm install -g esri-dump

```

## API

exposes a function, which if you give it a url, will return a stream of the geojson features.

```js

import EsriDump from 'esri-dump';

const esri = new EsriDump(url);

const  featureCollection = {

  type: 'FeatureCollection',

  features: []

}

esri.fetch();

esri.on('type', (type) => {

    //Emitted before any data events

    //emits one of

    // - `MapServer'

    // - `FeatureServer'

});

esri.on('feature', (feature) => {

    featureCollection.features.push(feature);

});

esri.on('done', () => {

    doSomething(null, featureCollection)

});

esri.on('error', (err) => {

    doSomething(err);

});

```

## Command Line

Streams a geojson feature collection to stdout

```sh

esri-dump fetch http://services2.bhamaps.com/arcgis/rest/services/AGS_jackson_co_il_taxmap/MapServer/0 > output.geojson

```

## Data Output

### FeatureServer and MapServer

Output from an ESRI `FeatureServer` or an ESRI `MapServer` is returned as GeoJSON as in the example below.

```json

{

    "type": "Feature",

    "properties": {

        "objectid": 1

    },

    "geometry": {

        "type": "Polygon",

        "coordinates": [

            [

                [

                    -65.6231319,

                    31.7127058

                ],

                [

                    -65.6144566,

                    31.7020286

                ],

                [

                    -65.6231319,

                    31.698692

                ],

                [

                    -65.6231319,

                    31.7127058

                ]

            ]

        ]

    }

}

```

# Development

`esri-dump` is written in TypeScript. To compile it locally, run:

```sh

npx tsc

```

See `/dist` for the compiled code.