Wow I didn’t know maps are actually just a bunch of triangles. Really nice + comprehensive post.
if only you knew how right you are! https://en.wikipedia.org/wiki/Triangulation_(surveying)
I built a vector map from scratch
11–20 of 43 posts
Re: I built a vector map from scratch
#12This tutorial is absolutely fantastic.
Re: I built a vector map from scratch
#13Having done this, with the added difficulty layer of completely geo-referencing a non-Earth world map from scratch in QGIS instead of using existing data, this is comprehensive, easy to read, with great examples. Fantastic work. It makes me want to finally write up the geo-referencing work in a similar format.
Re: I built a vector map from scratch
#14Whoa, zooming and panning too fast crashed the entirety of Firefox. All windows just gone in an instant. How is that even possible nowadays?
Re: I built a vector map from scratch
#15Whoa, zooming and panning too fast crashed the entirety of Firefox. All windows just gone in an instant. How is that even possible nowadays?
noting that the blinking off of FF is reproducible (not even doing anything fast)
Re: I built a vector map from scratch
#16Having done this, with the added difficulty layer of completely geo-referencing a non-Earth world map from scratch in QGIS instead of using existing data, this is comprehensive, easy to read, with great examples. Fantastic work. It makes me want to finally write up the geo-referencing work in a similar format.
All while having a newborn and being a fantastic dad :)
Re: I built a vector map from scratch
#17Whoa, zooming and panning too fast crashed the entirety of Firefox. All windows just gone in an instant. How is that even possible nowadays?
The memory consumption on FF is out of control. Just loading the app and not interacting, it's going up at 1GB per few seconds for me with no perceivable upper bound. I killed the tab before risking system instability. With Chrome I'm not seeing this behaviour - the memory is stable at around 500-600M (probably around 400M for the app).
Re: I built a vector map from scratch
#18Whoa, zooming and panning too fast crashed the entirety of Firefox. All windows just gone in an instant. How is that even possible nowadays?
I think is memory leak of sorts because it skyrocketed until it became unstable
Re: I built a vector map from scratch
#19Whoa, zooming and panning too fast crashed the entirety of Firefox. All windows just gone in an instant. How is that even possible nowadays?
The memory consumption on FF is out of control. Just loading the app and not interacting, it's going up at 1GB per few seconds for me with no perceivable upper bound. I killed the tab before risking system instability. With Chrome I'm not seeing this behaviour - the memory is stable at around 500-600M (probably around 400M for the app).
Interesting, my hunch would be something about the webgl buffers not getting freed, since they’re running in a tight loop. I’ll do some digging.
Re: I built a vector map from scratch
#20Fantastic post, such a wonderful step by step guide! Although everything loaded and “worked” on mobile (I’m using iOS), two small interaction hiccups would be great to solve: - when panning (on mobile), the panned distance seemed to track the finger’s movement with some factor i.e. when moving “1 cm” of “finger space” (i.e. real world movement), the map moved by more than “1 cm”. (Sorry for the weird units, ha) - the…
Yeah, I think this is a known issue with hammer.js[1]. I noticed it too, but didn't spend too much time digging in. [1]: https://stackoverflow.com/questions/42872774/hammer-js-exhib...
As I see demo map[0] uses OpenStreetMap Data, but in such case on demo map page[0] there should be copyright[1] info.