get_started - AtmaMani/gee Wiki


Fundamental data structures are the Image and Feature classes. Feature contains a Geometry and a dict of properties, Image consists of bands and dict of properties.

A stack of Image objs form the ImageCollection, similarly, a stack of Features is handled by FeatureCollection. All these are server-side objects.


Create an Image obj

The ee namespace comes loaded in the code editor. Hence, just run

var image1 = ee.Image('LANDSAT/LC8_L1T/LC80440342014077LGN00');

Load an image to map

Map.centerObject(image1, 9);

The centerObject() static method (since its called off the Map class and not an instance) accepts a scale range. Higher numbers = large scale, small number = small scale. You can load with optional parameters like this:

var vizParams = {bands: ['B5', 'B4', 'B3'],
				min: 5000, max:15000, gamma:1.3};
Map.addLayer(image1, vizParams, 'Landsat FCC')

Load features to a map

Construct a FeatureCollection using a fusion tables dataset as below. You reference the table using its encrypted key

var counties = ee.FeatureCollection('ft:1S4EB6319wWW2sWQDPhDvmSBIVrD3iEmCLYB7nMM');
Map.addLayer(counties, {}, 'counties');

git clone private_ee_scripts