[gdal-dev] Total Viewshed and GDAL

[Tamas Szekeres]

Luis,

I'm interested in testing such algorithm, is that code publicly available?

Best regards,

Tamas


Luis Felipe Romero <felipe at uma.es> ezt írta (időpont: 2023. ápr. 18., K,
7:15):

> Dear gdal-dev group members,
>
> I hope this email finds you well. I am Luis Felipe Romero, a researcher
> from the University of Malaga in Spain, and I am excited to introduce
> myself to this community. My research focuses on algorithms for digital
> elevation models (DEM), and in particular, the development of algorithms
> for the calculation of the total viewshed.
>
> Recently, my team has developed a highly efficient algorithm that can
> calculate the total viewshed for a model of 2500x2500 points in just 4
> seconds on a GPU or approximately 2 minutes on a 16-core CPU. Our algorithm
> is written in C++, and we also have a version that utilizes CUDA for GPU
> acceleration.
>
> I had a conversation with Even Roualt about the possibility of integrating
> our algorithm into GDAL. However, he informed me of the incompatibilities
> between GDAL and CUDA, but encouraged me to share my intentions with the
> group. Therefore, I would like to share our Total Viewshed approach with
> the gdal-dev community.
>
> Unlike Tamas Szekeres' Viewshed algorithm, our approach calculates the
> viewshed at all model points simultaneously by leveraging in-memory data
> alignment. While it may not be as efficient for calculating the viewshed of
> a small set of points, it is incredibly useful for determining the viewshed
> of an entire territory, such as for selecting the location of a cell phone
> tower or for forest surveillance path planning. Our algorithm can complete
> these types of calculations in a matter of minutes, as opposed to thousands
> of hours.
>
> My primary goal in reaching out to this group is to gain feedback and
> insights on how GDAL can be used to make our algorithms publicly accessible
> and even improved upon by the community. I believe that GDAL provides the
> necessary tools and interfaces to make this possible.
>
> I am currently in the process of familiarizing myself with the GDAL code
> structure, and it will take a few days before I can determine my first
> steps with it. Nevertheless, I am excited to contribute to this community
> and give visibility to our work.
>
> Thank you all in advance for your time and consideration.
>
> Best regards,
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