Google Earth Engine App – Hide Geometry Layer After Drawing

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I am working on a Google Earth Engine app and I would like to allow the user to draw an area of interest polygon (AOI). After drawing, I want to 1) generate the map layer from the drawing geometry layer; 2) not show the geometry layer without removing it. How can I do this? My script below can generate the map layer but cannot hide the geometry layer.

This is the link of my code:

https://code.earthengine.google.com/775c1ce26c099dce71abb912a31871d1

Best Answer

before end the chartNdviTimeSeries function, just include:

dummyGeometry.setShown(false)

link of example

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Google-Earth-Engine – How to Refresh Layers and UI Elements in Google Earth Engine App

Use Map.clear() which will clear all previously loaded layers.

Google Earth Engine – Changing Polygon Fill Color Based on User Drawing

This is not possible with the rectangle and polygon geometry types because they are closed geometries. You can show just the line with the line input to the ui.Map.DrawingTools.setShape method. However, this is not a closed geometry, so the resulting area of interest will only be the pixels that interest the line, which is probably not what you want. An alternative approach is to create a FeatureCollection from the geometry and then paint the FeatureCollection to a raster and display it (remove the drawn geometry object). I recognize the code is from the Interactive Region Reduction App tutorial - here is the section of code you can modify to display the geometry on a raster with only outline pixels showing (no fill).

var aoi = drawingTools.layers().get(0).getEeObject();

var aoiFc = ee.FeatureCollection(aoi);

var empty = ee.Image().byte();

var outline = empty.paint({
  featureCollection: aoiFc,
  color: 1,
  width: 3
});

Map.addLayer(outline, {palette: 'red'}, 'AOI');
clearGeometry();

See the full script that resets the map layer each time you click a drawing button: https://code.earthengine.google.com/1a8ac989376b297f02fc3e0a39e0d81a

Best Answer

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Google-Earth-Engine – How to Refresh Layers and UI Elements in Google Earth Engine App

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