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October 26, 2020 14:26
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zonal stats
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{ | |
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"cell_type": "code", | |
"source": "import os\nimport ee\nimport geemap", | |
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"source": "Map = geemap.Map()\nMap", | |
"execution_count": 2, | |
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"output_type": "display_data", | |
"data": { | |
"text/plain": "Map(center=[40, -100], controls=(WidgetControl(options=['position'], widget=HBox(children=(ToggleButton(value=…", | |
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"source": "start_date = '2013-01-01'\nend_date = '2013-12-31'\n\n# Add Earth Engine dataset\ndataset = ee.ImageCollection('NASA/GIMMS/3GV0') \\\n .filterDate(start_date, end_date) \n\nndvi = dataset.select('ndvi')\n\n# turn collection to bands\nndvi_bands = ndvi.toBands()\n\n# get Nonimal Scale\nprint(ndvi_bands.projection().nominalScale().getInfo())\n\nbuffers = Map.user_rois # replace buffers with your FeatureCollection. Alternatively, you can draw shapes on the map.\n\n# From Dr. Wu's tutorial:\nout_dir = os.path.join(os.path.expanduser('~'), 'Downloads')\nout_ndvi_stats = os.path.join(out_dir, 'ndvi_05to11_mean.csv') \ngeemap.zonal_statistics(ndvi_bands, buffers, out_ndvi_stats, statistics_type = 'MEAN', scale = 9276)", | |
"execution_count": 3, | |
"outputs": [ | |
{ | |
"output_type": "stream", | |
"text": "9276.624232772796\nComputing statistics ...\nGenerating URL ...\nDownloading data from https://earthengine.googleapis.com/v1alpha/projects/earthengine-legacy/tables/ca8c2d396ec8a5ebcc65b396f1b090b8-0a736b69a9e402064744c376f30c5b5b:getFeatures\nPlease wait ...\nData downloaded to /home/qiusheng/Downloads/ndvi_05to11_mean.csv\n", | |
"name": "stdout" | |
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"description": "zonal stats", | |
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