Leaflet.NonTiledLayer.WCS

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Leaflet.NonTiledLayer.WCS

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Leaflet plugin for displaying data from a Web Coverage Service

Leaflet.NonTiledLayer.WCS 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# Leaflet.NonTiledLayer.WCS
A [LeafletJS](http://www.leafletjs.com) plugin for displaying geoTIFF raster data from a Web Coverage Service. This plugin extends [Leaflet.NonTiledLayer](https://github.com/ptv-logistics/Leaflet.NonTiledLayer).

**[DEMO](https://stuartmatthews.github.io/Leaflet.NonTiledLayer.WCS/)**  The displayed data may take a few seconds to download.

![Sample](https://stuartmatthews.github.io/Leaflet.NonTiledLayer.WCS/example.png)

Sea ice coverage in the Southern Ocean.

This plugin uses [geotiff.js](https://github.com/constantinius/geotiff.js) and [plotty](https://github.com/santilland/plotty).

## Instructions

1. Include the JavaScript file and dependencies:
```html
    <script src="https://npmcdn.com/leaflet@1.0.3/dist/leaflet.js"></script>
    <script src="https://unpkg.com/leaflet.nontiledlayer/dist/NonTiledLayer.js"></script>
    <script src="vendor/geotiff.js"></script>
    <script src="vendor/plotty.js"></script>
    <script src="leaflet-geotiff.js"></script>
```

2. Add a WCS layer `L.nonTiledLayer.wcs(url,options)`
  * `url` - WCS url, e.g. `https://domain.org/cgi-bin/server_path?`
  * `options`:
    * `wcsOptions`: an object containing options for the WCS query, e.g. `{version: '1.0.0',}`
    * `displayMin`,`displayMax` - Minimum and maximum values to plot.
    * `clampLow`, `clampHigh` - (optional, default = true) If true values outside `displayMin` to `displayMax` will be rendered as if they were valid values.
    * `band` - (optional, default = 0) geoTIFF band to read.   
    * `image` - (optional, default = 0) geoTIFF image to read.    
    * `colorScale` - (optional, default = "rainbow").  Plotty color scale used to render the image.
    * `useCanvas` - (optional).  If available use a canvas element to render the images
 
3. Because WCS servers can be slow to respond, the layer fires a `wcsloading` event when data is requested and `wcsloaded` when the data arrives.
 
4. Data values can be extracted using the `getValueAtPoint(e.containerPoint)` method.

5. New color scales can be created using plotty's addColorScale method.

## Dependencies

* Leaflet.NonTiledLayer.WCS works with Leaflet 0.7.7 and >=1.0
  * Requires:
    * [Leaflet.NonTiledLayer](https://github.com/ptv-logistics/Leaflet.NonTiledLayer)
    * [geotiff.js](https://github.com/constantinius/geotiff.js)
    * [plotty](https://github.com/santilland/plotty)

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