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// Define an area of interest property for Point Lay. | |
var aoi = ee.Geometry.Rectangle(-162.7,69.4, -163.4,69.9); | |
// Import the Sentinel-1 Image Collection VV and VH polarizations within study area and date range | |
var sentinel1 = ee.ImageCollection('COPERNICUS/S1_GRD') | |
.filterBounds(aoi) | |
.filter(ee.Filter.date('2018-08-19', '2018-10-19')) | |
.filter(ee.Filter.listContains('transmitterReceiverPolarisation', 'VV')) | |
.filter(ee.Filter.listContains('transmitterReceiverPolarisation', 'VH')) | |
.filter(ee.Filter.eq('instrumentMode', 'IW')) |
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/* -*- coding: utf-8 -*- | |
--------------------------------------------------------------------------- | |
Cloud-reduced Greenest Pixel Composite Sentinel 2 Imagery for July 2015-2019 | |
Author: Timm Nawrocki, Alaska Center for Conservation Science | |
Created on: 2019-03-19 | |
Usage: Must be executed from the Google Earth Engine code editor. | |
Description: This script produces a cloud-reduced greenest pixel composite (based on maximum NDVI) for bands 1-12 plus Enhanced Vegetation Index-2 (EVI2), Normalized Burn Ratio (NBR), Normalized Difference Moisture Index (NDMI), Normalized Difference Snow Index (NDSI), Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI) using the Sentinel2 Top-Of-Atmosphere (TOA) reflectance image collection filtered to the month of July from 2015 through 2018. See Chander et al. 2009 for a description of the TOA reflectance method. The best pixel selection is based on maximum NDVI for all metrics to ensure uniform pixel selection from all bands. | |
- EVI-2 was calculate |
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/* -*- coding: utf-8 -*- | |
--------------------------------------------------------------------------- | |
Summary Chart of NDVI Trends in Calving Grounds for Four Arctic Caribou Herds | |
Author: Timm Nawrocki, Alaska Center for Conservation Science | |
Last Updated: 2020-02-05 | |
Usage: Must be executed from the Google Earth Engine code editor. | |
Description: This script charts the mean Normalized Difference Vegetation Index (NDVI) using | |
the MODIS data collection for the period of June 1-15 from 2000 to 2019 within generalized | |
calving areas of the Western Arctic Herd, Teshekpuk Herd, Central Arctic Herd, and Porcupine | |
Herd. This script was created as an example of wildlife-related applications of Google Earth |