Published my first crate today to https://crates.io/crates/nvtiff-sys! Rust bindings to the nvTIFF (Nvidia TIFF encoder/decoder) library.
Interface is not very friendly (need to use lots of unsafe), so definitely don't use it in production yet. But hoping it'll help to GPU-accelerate TIFF image processing (especially for geospatial or medical imaging workloads) once I wrap my head around how to handle raw pointers and lifetimes.
1,000+ newly digitised and georeferenced historical #maps from the ETH Library collection are now online! 🗺️ Take a look!
https://daas.library.ethz.ch/rib/v3/e-maps
#ethlibrary #carte #georeference #geotiff #historicalmaps #bibliothek #library #perpignan #france #opendata #publicdomain #foret
📷 "Essai d'une carte botanique et forestière de la France", Feuille de Perpignan, Paris 1897. ETH Library, Public Domain Mark / OpenStreetMap, 28.05.2025, Lizenz: ODbL 1.0
1000+ neue digitalisierte und georeferenzierte historische #Karten aus dem Bestand der ETH-Bibliothek: Schaut rein!
https://daas.library.ethz.ch/rib/v3/e-maps
#ethbibliothek #maps #carte #georeference #geotiff #georeferenzierung #historicalmaps #bibliothek #library #Kartensammlung #perpignan #france #publicdomain #foret
📷 "Essai d'une carte botanique et forestière de la France", Feuille de Perpignan, Paris 1897. ETH-Bibliothek, Public Domain Mark / OpenStreetMap, Stand: 28.05.2025, Lizenz: ODbL 1.0
A Zine from @developmentseed illustrated by @gus on Cloud Optimized Geospatial Data! Read @kiricarini's blog post at https://developmentseed.org/blog/2025-02-17-cloud-data-zine/
Salut les cartographes numériques ! Si vous avez un instant pour jeter un coup d’œil à notre description de #GeoTIFF dans une perspective de préservation à long terme (rappel : la fiche fournit un niveau d'info minimal sur les caractéristiques génériques du format mais s'appesantit surtout sur ce qu'on considère être un risque de préservation) :
https://github.com/hackathonBnF/FichesFormat/wiki/GeoTIFF
On prend les critiques et les corrections ! (je me permets notamment de pinger @EvenRouault là-dessus...)
Hier gibt es doch bestimmt Leute, die sich gut mit #GeoDaten auskennen. Ist dies wirklich eine #GeoTIFF Datei?
https://opendata.schleswig-holstein.de/data/elmshorn/Bebauungsplaene/B%20130/Elm_BP_130_Geotiff.zip
Normalerweise werden die von QGIS gleich an der richtigen Stellen platziert, diese aber nicht. Die TIFF-Datei scheint nicht die benötigten Metadaten zu haben.
Updates To New Zealand Topo50 Map Coverage - Toitū Te Whenua Land Information New Zealand
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https://www.linkedin.com/posts/toit%C5%AB-te-whenua-linz-_our-talented-cartographers-have-been-busy-activity-7274891422502195200-mCGe <-- shared post
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https://www.linz.govt.nz/products-services/maps/new-zealand-topographic-maps/topo50-map-chooser <-- Topo50 NZ Map Chooser
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https://www.linz.govt.nz/products-services/maps/new-zealand-topographic-maps/topo50-map-chooser/topo50-map-bs24-mount-robert <-- Topo50 map example - BS24 - Mount Robert
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H/T Toitū Te Whenua Land Information New Zealand
#GIS #spatial #mapping #map #papermap #geotiff #opendata #NewZealand #coverage #usecase #Topo50 #download #topographic #AI #machinelearning #emergencyresponse #planning #urbanplanning #tramping #tourism #leisure
@Toitū Te Whenua Land Information New Zealand @LINZ
How much can we gain from GeoTIFF compression? You can learn it from a blog post by Jens Wiesehahn.
Post: https://buff.ly/4havwHh
I just found a pure Python #geotiff implementation; it has been experimental for 3 years. It has a series of contributors, too.
Quite a long time ago, I wrote my own implementation of a TIFF library in C. That was before the well-known SGI libtiff implementation, and I know that writing such a lib from specs is not for the faint of heart: I was perfectly able to write legal TIFF files that caused segfaults for many applications at the time (but for Adobe ones).
Checking in from New Zealand! I'm developing a library to decode #GeoTIFF files in #rustlang (without using GDAL 😂). Currently trying to add an #xarray backend (in Python) at https://github.com/weiji14/cog3pio/pull/14.
"What would you need this f-" max elevation. I need to find the highest elevation given a GPS coordinate polygon that may cover 4 #GeoTIFF tiles, fast enough to be easily called every half second so that a virtual airplane can use that information to automatically set its autopilot altitude.
The actual polygon I need is a triangle that's wide enough at the plane to cover "emergency turns", and extends ~10NM ahead, so processing a 2°×2° "rectangle" at 30M resolution in ~500ms is encouraging.
"What would you need this f-" max elevation. I need to find the highest elevation given a GPS coordinate polygon that may cover 4 #GeoTIFF tiles, fast enough to be easily called every half second so that a virtual airplane can use that information to automatically set its autopilot altitude.
The actual polygon I need is a triangle that's wide enough at the plane to cover "emergency turns", and extends ~10NM ahead, so processing a 2°×2° "rectangle" at 30M resolution in ~500ms is encouraging.
cloud optimized #geotiff (#cog) question:
I've got a layer that renders fine in @qgis when is stored in a local drive & from a S3 URL.
But when its on a network drive (well, a "drive" through an S3 storage gateway), I get the following when zooming in:
[layername]: IReadBlock failed at X offset 21, Y offset 22: TIFFReadEncodedTile() failed.
Thought maybe its a file system thing & I need to use #gdal virtual file system paths, but not getting that to work at all. Any ideas? #gischat
Бесплатные векторные карты на своём хостинге
Векторные карты Protomaps на базе OSM Каждый веб-разработчик знает о OpenStreetMap (OSM), свободной альтернативе Google Maps. Несмотря на всеобщую известность OSM, у некоторых всё-таки возникают вопросы: как сделать веб-карту с открытыми данными OSM, как самостоятельно публиковать карты? На эту тему есть популярные руководства , в том числе по работе с базами PostGIS и запуску тайлсерверов для реализации бесшовных карт OSM. Но есть принципиально иной подход — векторные карты Protomaps , которые обеспечивают более высокое разрешение, настройку внешнего вида и наложение произвольных меток. Они изначально предполагают максимальную простоту в создании своих карт. А главное, что разместить тайлы можно на своём хостинге или в облаке.
https://habr.com/ru/companies/ruvds/articles/786698/
#ruvds_статьи #Protomaps #PMTiles #векторные_карты #Google_Maps_API #OpenStreetMap #protomapsleaflet #protomapsjs #тайлы #Leaflet #MapLibre_GL_JS #OpenLayers #GIS #Mapbox_Vector_Tile #Protocol_Buffers #PostGIS #Mapbox_GL #MapLibre_GL #GeoTIFF #COG #OpenMapTiles #Maputnik
GeoTIFF (Cartography 🗺️)
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF file. The potential additional information includes map projection, coordinate systems, ellipsoids, datums, and everything else necessary to establish the exact spatial reference for the file. The GeoTIFF format is fully compliant with TIFF 6.0, so software incapable of re...
I've used @pwramsey brilliantly simple how-to guide on geotiff compression for a few years now, it makes large orthomosaics easily viewable with no loss of quality. I got a 3gb geotiff down to 300mb!
https://blog.cleverelephant.ca/2015/02/geotiff-compression-for-dummies.html
The second fun part was going back to my #GeoTiff extraction. My initial attempt at dumping interleaved data to file ran in 40 min pr GB file. Straight dumping each component took 20min.
Started embedding #python in rust, due to GeoTiff library, but realized I was shaving yaks.
So today I rewrote to interleave using numpy array to file, and it took over 30 minutes. Switched to struct.pack and it did it in 6-7 minutes. Good enough, for now :)
Next up processing the data in rust!
