The earth’s mantle — Primary Research
After having many ideas going in different directions I reached the conclusion that I was going far away from satellite imagery systems. I went back to the beginning and I deeply researched about how satellites actually work.
From various sources and asking geographers friends I learnt that satellites sensors capture their data in different spectral bands, by combining different bands we can access to different data for example. In this link I found information of what bands are used for different purpose, this information is key for my project because using satellite data from bands I will explore some locations.
PROTOTYPING
For my first prototype I want to understand the concepts I mentioned before by analysing satellite imagery from Volcan de Fuego. To do this I have tried a tutorial to download from Sentinel data from Sentinels Scientific Data Hub.
I tried to search for Volcan de Fuego to redefine my search but I did not get any results so I decided to zoom in manually in the area of the volcano in Guatemala which is the one shown in the yellow rectangle. I pressed enter and all data came up.
Using a different tutorial to combine the data I tried to seek for differences in the satellite imagery of the Volcan de Fuego. This was unsuccessful because it required a software called ArcGis Desktop not available for MacBook. I searched for other options and I discovered EOS Land Viewer, this tool was very helpful to get hands on understanding satellite imagery bands. It allowed me to analyse Volcan de Fuego data before and after the eruption on the 3r of June 2018 with already combined bands. Good useful tool for my lack of knowledge in the subject
Based on the learning I will explore the damaged caused by ‘Volcán de Fuego’ (volcano) in Guatemala.
PROTOTYPING 3D MODEL
The first thing I had to do is decide how much terrain I want to show. For this is important to show enough amount of space to give the most accurate information of villages that were affected by the volcano.
I have discover a new option in the EOS Land Viewer that allows to see the 3D model:
Next to the Volcan de Fuego there is another volcano called Acatenango that’s why in that example appears like I’m cutting the volcano in half but this is because they are joined together.
In order to know what parts were damaged the most I have used a comparison slider of the R+G+B image.
