Digital Geography

Description code for article “Using the Google Earth Engine (GEE) for Detection of Burned Areas”

I want to continue my article “Using the Google Earth Engine (GEE) for Detection of Burned Areas” (link) and describe in detail script for detection burned areas. I decided to post here code of this script with comments, shchems and illustrations of wotk this scrip Link to script on Google Earth Engine This script shows two variants for detection burned area: Calculating spectral index NBR for before and after forest fire images, download on your computer and compare these scenes in software using function change detection. Calculating spectral index NBR for after forest fire images and select burned areas using threshold. My…

Using the Google Earth Engine (GEE) for Detection of Burned Areas

Google Earth Engine ( GEE ) is a cloud platform for processing satellite imageries. This service includes images of Landsat 5, 7,8, Sentinel 1 and Sentinel 2. You can process them directly on Google servers and don’t need download the images. This opportunity does processing of satellite imageries faster then on a limited desktop PC. However, you should have programming skills, because this is based on JavaScript code and the Google Earth Engine API.

GPX overview: An R function to create an overview of your .gpx files (using leaflet and RgoogleMaps)

Why GPX? For what? It's convenient to record tracks of your hiking/field trips with the GPS of your smartphone, tablet or just GPS as .gpx files. You can use them to georeference your pictures (for example with the great georefencer of Digikam) or use them for any kind of mapping purpose. I'm mainly using Maverick (and sometimes the Offline Logger ) to do that, Maverick creates files named with the form "2015-08-26 @ 11-31-59.gpx", therefore I'm quickly collecting a large amount of such files.

Google Earth Pro is now for free!

Google recently made an announcement that left me very happy: Google Earth Pro, the enhanced version of the world’s most popular digital globe, is now available for free. The software comes with some additional features compared to classical GoogleEarth and used to be $400 per year – actually many users paid because the benefit was huge. Now all you have to do is to register, get a free key, and download the software. If registration doesn’t work for you, don’t worry and don’t give up. It didn’t work for me when I tried first, the next day I tried again…

Google Earth Engine – free spatial data- and analyse-workspace

Google’s Earth Engine offers spatial researcher-tools in combination with their huge amount of collected satellite data. In fact you have the possibility to access e.g. 40 years of LANDSAT-data (of course for free) and show it in your browser-worspace. But this is just the beginning. Explore detection of deforestation, landcover classification, biomass and carbon estimates and much more.

short announce: the new google maps – a comparison

The new google maps is now in sort of a Beta and availbale on invitation. Let me share some of the new features with you: As you can see, you will have much more space available to see pictures on the map. What I like most is the very reduced implementation of search results as they are shwon in the lower part of the map and you will not have thes ugly markers scattered all over the map anymore: But let’s go a little further and have a look on the routing engine: In the new google maps engine you…

Rainfall and weather data on GoogleEarth

On Saturday, some villages near my hometown suffered heavy rains. Up to 100 l/m² arrived during the afternoon and evening in Kirchhasel and other places in central Thuringia. Small streams became rivers and flash flooding occurred, damaging houses, roads, and cars. The local newspaper has an impressive pic dump. Locals say this have been the worst flooding for at least 40 years, so pretty much excitement here, we are not really used to this despite the river Saale caused some heavy floodings in the past. Now it looks like thunderstorms will arrive again: So I had a reason to think…

short announcement: Earth Engine by Google

On the 9th of May Google introduced an astonishing new technology that makes the good old flickr function in Erdas Imagine quite useless. With the Earth Engine from Google Earth you will be able to see the world change since 1984. They have compiled about 900 terabyte of Landsat Data. So they stitched, balanced the contrast, analysed and ordered about 2’000’000 images of the world to provide a comprehensive look into Earth’ history: Erdenet (Mongolia): coal mining lake Ugii Nuur (Mongolia): drying and dying Jänschwalde (Germany): coal mining Las Vegas (USA): urban sprawl Additionally you are able to browse the…