"Distorted maps are like stretched book shelves" #dggs #h3 #maps

Tutorial about #dggs, discrete global systems, a well organised "library", addressing fundamental issues from #gis(: João from geoinsight at #codesprint25 #mentorstream

In today's #GeoMob in Lisbon my introduction to Discrete Global Grid Systems was elected as best presentation.

I am grateful to the organisers and the participants. But this wouldnt have happened without the work from those that for over thirty years have been pushing #DGGS ever closer to the end user. I stand on the shoulders of giants.

The prize was a fine copy of this historical map, "Portugal laying down", in which West is up.

@geomob

@geomob the next speaker laid out the fascinating story of Discrete Global Grid Systems, which can revolutionise the way we represent and combine data in the surface of the world #dggs #standatds #datacube #h3 #geomoblx

Justus made a great intro on using #DGGS through #xarray #xdggs at the #Pangeo showcase talk. Xdggs is now in a stage where you can use it fairly robustly with #HEALPIX and #H3. Other integrations like for #DGGRID are developed as separate plugins.

https://youtube.com/watch?v=bAMGFKsxsjs&si=hnfpk04VMn-rggEV

Great new paper in #BigEarthData on #DGGS practical application on #landuse mapping at #ManaakiWhenua #LandcareResearch New Zealand. While they used #H3 due to available tooling they described the generalisable methodology really well.
https://www.tandfonline.com/doi/full/10.1080/20964471.2024.2429847 #geospatial #gis

#DGGS #API is for a new and innovative way of sharing and indexing #geospatial data, that works with multi-resolution location identifiers across scales on the whole globe. API ergonomics are important for wide uptake and usability, open for feedback 🌍🌐

https://www.ogc.org/requests/ogc-requests-public-comment-on-candidate-ogc-api-dggs-standard/

I did a thing - jumping the bandwagon and kicking off an #awesome collection for #DGGS #grids #geospatial https://github.com/LandscapeGeoinformatics/awesome-discrete-global-grid-systems #gis #ocg #dggrid #healpix #isea #hex

Checking in from the #OGC @opengeospatial member meeting in Goyang, South Korea. Here for #DGGS. Side info #OvertureMaps is a principal member now and Bentley has acquired Cesium 3d globe software

Dggrid | http://Anaconda.org You can now install #DGGRID on Apple Silicon/ osx-arm64 architecture. I also managed to update to the stable 8.1 version. DGGRID version 8.3 with exciting news features and indexing systems will land soon too #DGGS #geospatial #grid https://anaconda.org/conda-forge/dggrid

Advancing Digital Earth Modeling - Hexagonal Multi-Structural Elements In Icosahedral DGGS For Enhanced Geospatial Data Processing
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https://doi.org/10.1016/j.envsoft.2023.105922 <-- shared paper
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https://en.wikipedia.org/wiki/Discrete_global_grid <-- DGD wiki page
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[the math is way over my head, hence the wiki page leak, but a good read nonetheless]
“HIGHLIGHTS:
• Hexagonal multi-structural elements enhance Earth's surface modeling precision.
• Integration of indexing and conversion rules improves geospatial data computation.
• DGGRID implementation shows increased precision in raster and vector data modeling.
• Addresses limitations in existing software for Earth observation data.
• Pioneering approach expands geospatial data processing applications…"
#GIS #spatial #mapping #DiscreteGlobalGrid #DGG #DGGS #indexing #conversion #rules #computation #Hexagonal #DGGRID #raster #vector #data #model #modeling #earthobservation #remotesensing #grid #vertices #edges #icosahedral #projections #coordinates #representation

The amount of #geospatial #bigdata #grid @xarray_dev @pangeo_data compute, coding, and conceptual brain power is mind-blowing. Very humbling yet empowering to work with these smart people to bring #DGGS #datacube functions to the Pangeo ecosystem.

Major drop in productivity on the second day of code sprint at #FOSS4G2023. Seven days of constant stimuli taking their tool.

This morning I been working on a #pygeoapi manuscript and a bit on #DGGS. See if I can get to #BBox and #SPARQL Unicorn in the afternoon.

Release v0.2.6 of #dggrid4py adds functionality to split cells along the 180º meridian. This allows purely Cartesian programmes like #QGis to portray a #DGGS.

Still a brute force approach, needs an heuristic to limit down the set of cells tested.

https://github.com/allixender/dggrid4py/releases/tag/v0.2.6

These days I have been addressing cases like this. A #DGGS cell that crosses the 180° meridian. None of the #FOSS4G software I use is able to interpret it correctly. Long way to go for modern #GIS.

@opengeospatial webinar on Discrete Global Grids. A little glimpse of the future. #DGGS https://tinyurl.com/ydahbulq