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GeoSpark
773 posts

GeoSpark
@GeoSparkJohn
Freelance geospatial and archaeological software engineer, GIS consultant.
Katılım Eylül 2012
50 Takip Edilen83 Takipçiler
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@tomchadwin Glad it made some sort of sense! LibreOffice has a MMULT function. You need to make the arrays square, so in this case you need to add a column to the right of (0,0,1) to square up both matrices before multiplying. Then you need to add a 1 to each coordinate, and it should work.
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@tomchadwin Twitter isn't the best place to teach the fundamentals of vector maths 😂 /3
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@tomchadwin The translation op is the same as matrix(1,0,0,1,x,y) where x, y are the translation values. So you need to matrix multiply the first by the second (it's not commutative) then multiply each vertex by this new matrix. For a one-off, I'd use a spreadsheet. /2
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@tomchadwin The 1st 4 numbers in the matrix represent a scaling factor, with the -ve value being a flip along the y axis. The last 2 numbers are a translation. The translation operator then moves the points in the now-scaled coordinate system. /1
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@GeoSparkJohn No. Organizations that wish to rebrand it and use it in their own sites can contact @hobuinc for licensing. copc.js is available as open source, and COPC follows EPTs access pattern, so its inclusion in something like #Potree should be straightforward. github.com/connormanning/…
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@howardbutler Is the source for the COPC viewer FOSS? We're looking to develop something similar, but don't want to reinvent stuff.
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GREAT NEWS
My ongoing campaign to limit the number of people retweeting this image and causing any upset to Jacob Rees-Mogg has made great progress I am now so confident that nobody will RT it that I am going to tag in @Jacob_Rees_Mogg so he can see how well we're doing.
Thanks

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@howardbutler @STACspec @cogeotiff @entwineio Indeed, I was being a bit flippant. I have pondered something similar in the past, and your idea sounds good. An advantage of EPT and Cesium tho is one just serves files, rather than having to seek and serve chunks. Not necessarily a big issue, and both have advantages.
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@GeoSparkJohn @STACspec @cogeotiff @entwineio Funnily enough, at least COPC and @cogeotiff don't exactly ++ the standard count, as they're both clever opt-in extensions of the existing LAZ and GeoTIFF formats.
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If you're at #geoweek in Denver, come hear me talk about COPC.io, COPC+@STACspec, and @cogeotiff at both the ILMF and ASPRS tracks on Tuesday. Or find me in the hallway for some special @entwineio swag.
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@Raspberry_Pi Seems legit to me. Off to the supermarket to get the ingredients!
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Fleet is an IDE and a lightweight editor. It’s flexible and polyglot, with support for collaboration and remote workflows. It’s built from scratch but uses the @intellijidea code-processing engine for smart code editing. Read more and join the Preview blog.jetbrains.com/blog/2021/11/2…

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