Interesting observation.

Yes, you can go onto the Microsoft Store and buy a copy of my software - ProRaster Scientific, ProRaster Premium, or ProRaster Essential. Then encourage about 1000 of your friends to do the same thing.

Thanks for watching and good luck with your research. Anything that can reduce the carbon footprint of alumina processing is welcome.

Yes, normally I would be careful to compare like-for-like data at the same time of the year, over as tight time range as possible. However, there are so few cloud free days at Macquarie Island that you can't afford to be picky. Note that the "Land" mask that ProRaster Scientific creates for you for the scene from the QA data masks out Ocean, Lakes, Rivers, Clouds, Snow, and Ice (as well as noisy pixels). So, winter data is masked out naturally because the island is snow covered, and cloud-free winter days pretty much don't exist anyway. The result is that there is no data between April and September, and 99% of the data is drawn from December and January. In other words, the analysis is based on summer vegetation cover.

These days bathymetric soundings are acquired by echo sounding (multibeam sonar). The linear features probably represent ship tracks along which echo soundings have been acquired. The data along these tracks is gathered together and gridded to create a continuous raster with a constant cell size. In between the ship coverage, the grid might get filled in with low-resolution data. This data is not directly measured - it is inferred from variations in the gravitational field. Getting noisy, high-resolution, measured sonar data to marry with smooth, low-resolution, inferred gravitation data is difficult. The result is generally nasty to look at, especially when you use sun-shading to emphasise the noisy changes in slope. The GOM data is substantially better, but it is derived from 3D seismic surveys (itself a kind of sonar measurement) and the detail, coverage, and data processing are far superior. If you are interested in bathymetry then the GEBCO website is a good place to go exploring. www.gebco.net/

Hi Aurélio, ProRaster Premium and ProRaster Scientific can augment QGIS. You will still use QGIS as your primary GIS platform! ProRaster makes it fun to explore raster data, and you can export your imagery to TIFF files that you can display in QGIS. If you want to start working with Landsat or Sentinel2 imagery, ProRaster Scientific is much easier to use and far more powerful than QGIS. Go to the Microsoft Store, search for and install "ProRaster Premium Free". This free (but restricted) version can help you evaluate the product. It is only available in English, sorry! Unfortunately, I do not have a free version of ProRaster Scientific that you can use for evaluation. I will have more videos next week showing the capabilities of the product. Thanks for commenting!

Hi Arjun. I can't give you any specific advice on ArcMap. However, it is certainly conceptually possible to pan sharpen Landsat level 2 data. Unfortunately, when you download a Landsat level 2 (bottom of atmosphere/surface reflectance) scene, it does not ship with the pan band. I wish it did! However, you can download the level 1 data for the same scene (make sure it is contemporaneous) and acquire the pan band. In ProRaster, you can use the level 1 pan band to pan sharpen level 2 spectral bands simply by connecting to it in the Pan component in the RGB layer of your rendering algorithm. So it is possible. I do not have ArcMap so I can't advise you on how to achieve the same effect in that product. I would be very surprised if it is not possible. Thanks for commenting!

Thanks sir for ur elaborative explanation about the problem. I will surely try this on ProRaster. Will contact u in future. Ragards

@@arjunsaha6359 You will need "ProRaster Scientific" which I am still developing. I hope to have the first release available for purchase by the end of May. I will begin recording and posting some videos soon so you can see what kind of capabilities it will have.

Thanks for commenting! As I progress the software engineering I am posting videos at my ProRaster Scientific site as well as on KZbin. robertsgeospatial.com.au/products/proraster/scientific/

Hi Steve, sure I could do that, or it would be easy to record a new video that is more focussed if you have a particular application in mind. Skype.

The software I used to render those rasters is now available from the Microsoft Store. Search for "ProRaster" on the Store. For more information go to robertsgeospatial.com.au/products/proraster/

Glad it helped!