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What data sources do you work with? I didn't know about RTK, it looks interesting but seems hardly applicable to satellite imagery, since it seems that you'd ne
by plonk 4y ago
What data sources do you work with? I didn't know about RTK, it looks interesting but seems hardly applicable to satellite imagery, since it seems that you'd need a lot of receiving stations on the ground?
My understanding is that providers like Maxar report coordinate systems correctly, but that errors in ortho-rectification (due to imprecise or wrong terrain altitude data) make it hard to make two images of the same area match exactly.
> even using advanced systems from leading suppliers, vital facts are just not recorded because geographic coordinates system are so numerous and complex suppliers just offer defaults and do the real work in the background
Not sure I understand what you mean by this. Do you get data that reports a coordinate system different from the one it actually uses?
- petrev01 4y agoIMO- an intro level college courses in GIS and/projections would go a long way here. I’ve often found that to be the case for the software community.
- plonk 4y agoI mean, maybe it would help, but I've already learned the basics of how projections and coordinate systems work, and I can't make the link with GP's "vital facts are just not recorded because [...] suppliers just offer defaults and do the real work in the background." Any online resources you'd recommend?