![]() Java is a registered trademark of Oracle and/or its affiliates. For details, see the Google Developers Site Policies. Vector boundariesĮxcept as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. Zones of nightlights in the Tokyo, Japan area. Var vectors = zones.addBands(nl2012).reduceToVectors() and the mean of the nightlights band, since the mean Convert the zones of the thresholded nightlights to vectors. ![]() Define arbitrary thresholds on the 6-bit nightlights image. Load a 2012 nightlights image, clipped to the Japan border. Theres a somewhat painless way to do it with free. filter(ee.Filter.eq('country_na', 'Japan')) You can do this with the Spatial Analyst extension for ArcGIS, but the two together are pretty expensive. Var japan = ee.FeatureCollection('USDOS/LSIB_SIMPLE/2017') ReduceToVectors(): Code Editor (JavaScript) // Load a Japan boundary from the Large Scale International Boundary dataset. add (selectedFeature) But the color of the updated feature do not change. On the nightlights, combine the zones into a single-band image, vectorize the zones using Click the map to begin drawing a polygon. Number serve as a proxy for development intensity. ![]() The reduceToVectors() methodĬreates polygon edges (optionally centroids or bounding boxes instead) at the boundary ofįor example, consider a 2012 nightlights image of Japan. (Optional) The field used to assign values from the cells in the input raster to the polygons in the output dataset. Mechanism for vectorization in Earth Engine, and can be useful for generating regionsįor input to other types of reducer. With this option, converting the resulting polygon feature class back to a raster would produce a raster the same as the original. (vector) data type, use image.reduceToVectors(). To convert from an Image (raster) to a FeatureCollection
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