Important Sites to Download Freely Available GIS Datasets – In the USA

Forewords As a researcher, it is always troublesome to find right datasets for right projects. It could be more infuriating when you lose the websites that you’ve been downloading the data from. The best idea is to bookmark the important websites so that you will never loose them. Check these websites to “Download GIS Data byContinue reading “Important Sites to Download Freely Available GIS Datasets – In the USA”

Important Sites to Download Freely Available GIS Data-sets Across the World!

As a researcher, it is always troublesome to find right datasets for right projects. It could be more infuriating when you lose the websites that you’ve been downloading the data from. The best idea is to bookmark the important websites so that you will never loose them. Check these websites to “Download GIS Data- Global”Continue reading “Important Sites to Download Freely Available GIS Data-sets Across the World!”

Learn how to calculate and export 90th Percentile Annual NDVI for years 1985-2019 using Landsat 8, 7, and 5 scenes (Study Area: Turkey)

What is NDVI? The Normalized Difference Vegetation Index (NDVI) is referred to as the continuity index to the existing National Oceanic and Atmospheric Administration-Advanced Very High-Resolution Radiometer (NOAA-AVHRR) derived NDVI. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) In this tutorial, we will look at a simple method toContinue reading “Learn how to calculate and export 90th Percentile Annual NDVI for years 1985-2019 using Landsat 8, 7, and 5 scenes (Study Area: Turkey)”

Create a Chart to show Landsat 8 TOA Spectra at three points near Mumbai City

Let’s learn something fun today. We will try to create a chart that shows Landsat 8 TOA Spectra at three points near Mumbai City. In addition, we will do some exciting stuffs. We will do the following things today: Load and display a Landsat 8 image’s reflective bands. Create an NDWI image, define visualization parametersContinue reading “Create a Chart to show Landsat 8 TOA Spectra at three points near Mumbai City”

Learn How to Add two charts next to the map to interactively display a time-series of NDVI and reflectance for each click on the map?

Learn about Data USGS Landsat 8 Collection 1 Tier 1 and Real-Time data TOA Reflectance Landsat 8 Collection 1 Tier 1 and Real-Time data calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation. The Landsat 8 images are of 30 m and 16Continue reading “Learn How to Add two charts next to the map to interactively display a time-series of NDVI and reflectance for each click on the map?”

Using 2001 MODIS Land Cover Type Yearly Global 500m Data to Determine the Land-Cover Analysis (Study Area: Mexico)

About Data The MODIS Land Cover Type Yearly Global 500m product provides global land cover types at yearly intervals (2001-2016) derived from six different classification schemes. For this tutorial we will be using 2001 MODIS data. The data was prepared using the supervised classifications of MODIS Terra and Aqua reflectance data followed by additional post-processingContinue reading “Using 2001 MODIS Land Cover Type Yearly Global 500m Data to Determine the Land-Cover Analysis (Study Area: Mexico)”

Night Light Maps (Study Area: South Asia)

It is always wonderful to look at the globe with different prescriptive. In this tutorial, we will look at the nightlight map of the world. We will zoom at South Asian countries (Nepal, India, Bhutan, Pakistan, Bangladesh, Afghanistan, and Myanmar) to look at nightlight activity. You may want to change the country name and lookContinue reading “Night Light Maps (Study Area: South Asia)”

Make your map look Artistic – Add Grid Lines in your Map (Study Area: Canada)

Google Earth Engine offers various option to make the maps look artistic. Some of them are adding palettes to the maps, adding time series, title, legends, time-lapse, and many more. In this tutorial, we will talk about adding grid lines in our map. Data Overview The Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) dataset containsContinue reading “Make your map look Artistic – Add Grid Lines in your Map (Study Area: Canada)”

Using Hansen Global Forest Change Data to determine Forest Cover, Forest Gain, and Forest Loss (Study Area: Malaysia)

Forest change, especially forest loss, has become one of the major issues of the globe. There are several studies based on the global forest change. This tutorial uses  Hansen et al. (2013) Global Forest Change dataset available in Google Earth Engine data catalog to determine the Forest Cover, Forest Gain, and Forest Loss in Malaysia. AboutContinue reading “Using Hansen Global Forest Change Data to determine Forest Cover, Forest Gain, and Forest Loss (Study Area: Malaysia)”

Display Natural Color, Color Infrared (Vegetation), Healthy Vegetation, and Vegetation Analysis Maps in a Single Screen using Simple Codes in Google Earth Engine – Study Area (Ethiopia)

Undoubtedly, GEE has made a lot things easier. Some of these include: detecting deforestation, classifying land cover, estimating forest biomass and carbon, and mapping the world’s roadless areas, and so on and so forth. The advantage lies in its remarkable computation speed, as processing is outsourced to Google servers. The platform provides a variety ofContinue reading “Display Natural Color, Color Infrared (Vegetation), Healthy Vegetation, and Vegetation Analysis Maps in a Single Screen using Simple Codes in Google Earth Engine – Study Area (Ethiopia)”

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