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A comment on 3D map of the whole Czech Republic, made from 12.5cm/px imagery (2017). Parent comment

Re:3D map of the whole Czech Republic, made from 12.5cm/px i... by lucgommans on Sunday November 06, 2022 @12:06PM (#33494695)
Recently at an OSM meetup with the local government in Aachen (Germany), they mentioned that some imagery they shot was deemed too invasive and only used internally. I thought that was 10cm, but now checking what is available, looks like I was wrong! Probably it was 5-7cm then? Or maybe this was rather about the imagery available from different angles, so you can see into gardens from different directions?

In iD I see that indeed the PDOK imagery is now labeled 7.5cm, but checking that against the Belgian and German 10cm:

PDOK 7.5cm: https://snipboard.io/fbWqYM.jpg

AIV Flanders 10cm: https://snipboard.io/Ahn4lJ.jpg

NRW (Germany) 10cm: https://snipboard.io/RpT3vA.jpg

PDOK's looks awful, much worse than 10. Maybe some regions are available in a higher resolution?

[ Parent | on HN ]
Re:3D map of the whole Czech Republic, made from 12.5cm/px i... by isoprophlex on Monday November 07, 2022 @01:32AM (#33501942)
That is indeed awful, you're right. I remember that satellietdataportaal.nl or something like that allowed access to uncompressed files, maybe they're better. I'll see if I can find my old credentials and compare.

But yeah, compared to those 10 cm images, that can't be effective 7.5 cm/px.

Related: Apple Maps uses some data source that is ridiculously high res for my street. They've updated the image now sadly, but for a while I saw a gangly brown haired silhouette chasing two blonde haired kids across the street. I was super sure that was me and my kids; slanted shadows gave the right relative sizes, too. Cool and creepy at the same time.

[ Parent | on HN ]
Re:3D map of the whole Czech Republic, made from 12.5cm/px i... by iggldiggl on Monday November 07, 2022 @09:26AM (#33506137)
For the Dutch railway network, ProRail has commissioned a set of aerial images shot from a helicopter at a height of roughly 190 m, which is ridiculously high-res and available for viewing here: https://twiav.nl/nl/luchtfoto_prorail.php

You can clearly make out individual paving stones or even the catenary wire, so the resolution must be somewhere in the 1 or 2 cm range.

[ Parent | on HN ]