32 lines
1.1 KiB
HTML
32 lines
1.1 KiB
HTML
---
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layout: example.html
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title: Raster Source
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shortdesc: Demonstrates pixelwise operations with a raster source.
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docs: >
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<p>
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This example uses a <code>ol/source/Raster</code> to generate data
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based on another source. The raster source accepts any number of
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input sources (tile or image based) and runs a pipeline of
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operations on the input pixels. The return from the final
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operation is used as the data for the output source.
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</p>
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<p>
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In this case, a single tiled source of imagery is used as input.
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For each pixel, the Vegetation Greenness Index
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(<a href="https://www.tandfonline.com/doi/abs/10.1080/10106040108542184#.Vb90ITBViko">VGI</a>)
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is calculated from the input pixels. A second operation colors
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those pixels based on a threshold value (values above the
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threshold are green and those below are transparent).
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</p>
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tags: "raster, pixel, maptiler"
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resources:
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- https://unpkg.com/d3@4.12.0/build/d3.js
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cloak:
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- key: get_your_own_D6rA4zTHduk6KOKTXzGB
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value: Get your own API key at https://www.maptiler.com/cloud/
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---
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<div class="rel">
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<div id="map" class="map"></div>
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<div id="plot"></div>
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</div>
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