--- layout: example.html title: Raster Source shortdesc: Demonstrates pixelwise operations with a raster source. docs: >

This example uses a `ol.source.Raster` to generate data based on another source. The raster source accepts any number of input sources (tile or image based) and runs a pipeline of operations on the input pixels. The return from the final operation is used as the data for the output source.

In this case, a single tiled source of imagery is used as input. For each pixel, the Vegetation Greenness Index (VGI) is calculated from the input pixels. A second operation colors those pixels based on a threshold value (values above the threshold are green and those below are transparent).

tags: "raster, pixel" resources: - https://d3js.org/d3.v3.min.js cloak: As1HiMj1PvLPlqc_gtM7AqZfBL8ZL3VrjaS3zIb22Uvb9WKhuJObROC-qUpa81U5: Your Bing Maps Key from http://www.bingmapsportal.com/ here ---