#digitalterrainmodel — Public Fediverse posts

Overland Flow Pathways [England]
--
https://environment.data.gov.uk/dataset/36e7f4d3-61b2-4e64-aaa2-2b85bceb61a9 <-- shared technical resource / overview
--
#GIS #spatial #mapping #environment #Elevation #Hydrography #hydrology #remotesensing #survey #hydrologicflow #flow #catchment #DigitalElevationModel #LiDAR #remotesensing #earthobservation #opendata #UK #England #Britain #overlandflow #water #hydrology #risk #hazard #pollution #soil #erosion #flood #flooding #risk #hazard #naturalhazard #network #polyline #DTM #landscape #slope #D8 #watershed #ponding #flowdirection #environment #hydroenforced #digitalterrainmodel
#OrdnanceSurvey | #UKEnvironmentAgency

Overland Flow Pathways [England]
--
https://environment.data.gov.uk/dataset/36e7f4d3-61b2-4e64-aaa2-2b85bceb61a9 <-- shared technical resource / overview
--
#GIS #spatial #mapping #environment #Elevation #Hydrography #hydrology #remotesensing #survey #hydrologicflow #flow #catchment #DigitalElevationModel #LiDAR #remotesensing #earthobservation #opendata #UK #England #Britain #overlandflow #water #hydrology #risk #hazard #pollution #soil #erosion #flood #flooding #risk #hazard #naturalhazard #network #polyline #DTM #landscape #slope #D8 #watershed #ponding #flowdirection #environment #hydroenforced #digitalterrainmodel
#OrdnanceSurvey | #UKEnvironmentAgency

Overland Flow Pathways [England]
--
https://environment.data.gov.uk/dataset/36e7f4d3-61b2-4e64-aaa2-2b85bceb61a9 <-- shared technical resource / overview
--
#GIS #spatial #mapping #environment #Elevation #Hydrography #hydrology #remotesensing #survey #hydrologicflow #flow #catchment #DigitalElevationModel #LiDAR #remotesensing #earthobservation #opendata #UK #England #Britain #overlandflow #water #hydrology #risk #hazard #pollution #soil #erosion #flood #flooding #risk #hazard #naturalhazard #network #polyline #DTM #landscape #slope #D8 #watershed #ponding #flowdirection #environment #hydroenforced #digitalterrainmodel
#OrdnanceSurvey | #UKEnvironmentAgency

Overland Flow Pathways [England]
--
https://environment.data.gov.uk/dataset/36e7f4d3-61b2-4e64-aaa2-2b85bceb61a9 <-- shared technical resource / overview
--
#GIS #spatial #mapping #environment #Elevation #Hydrography #hydrology #remotesensing #survey #hydrologicflow #flow #catchment #DigitalElevationModel #LiDAR #remotesensing #earthobservation #opendata #UK #England #Britain #overlandflow #water #hydrology #risk #hazard #pollution #soil #erosion #flood #flooding #risk #hazard #naturalhazard #network #polyline #DTM #landscape #slope #D8 #watershed #ponding #flowdirection #environment #hydroenforced #digitalterrainmodel
#OrdnanceSurvey | #UKEnvironmentAgency

Overland Flow Pathways [England]
--
https://environment.data.gov.uk/dataset/36e7f4d3-61b2-4e64-aaa2-2b85bceb61a9 <-- shared technical resource / overview
--
#GIS #spatial #mapping #environment #Elevation #Hydrography #hydrology #remotesensing #survey #hydrologicflow #flow #catchment #DigitalElevationModel #LiDAR #remotesensing #earthobservation #opendata #UK #England #Britain #overlandflow #water #hydrology #risk #hazard #pollution #soil #erosion #flood #flooding #risk #hazard #naturalhazard #network #polyline #DTM #landscape #slope #D8 #watershed #ponding #flowdirection #environment #hydroenforced #digitalterrainmodel
#OrdnanceSurvey | #UKEnvironmentAgency

GEDTM30: Global 30 meter terrain data: A team of researchers has released #GEDTM30, a global #DigitalTerrainModel with 30-meter (1 arcsecond) resolution, generated through #MachineLearning fusion of various data sources, and accompanied by 15 geomorphometric parameters computed at...
https://spatialists.ch/posts/2025/05/28-gedtm30-global-30-meter-terrain-data/ #GIS #GISchat #geospatial #SwissGIS

GEDTM30: Global 30 meter terrain data: A team of researchers has released #GEDTM30, a global #DigitalTerrainModel with 30-meter (1 arcsecond) resolution, generated through #MachineLearning fusion of various data sources, and accompanied by 15 geomorphometric parameters computed at...
https://spatialists.ch/posts/2025/05-28-gedtm30-global-30-meter-terrain-data/ #GIS #GISchat #geospatial #SwissGIS

GEDTM30 – A Global 1-Arc-Second (~30m) Digital Terrain Model (DTM)
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https://github.com/openlandmap/GEDTM30 <-- shared GitHub repository
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#GIS #spatial #mapping #opendata #global #DTM #GEDTM30 #GitHub #30m #landsurface #parameters #documentation #hydrology #remotesensing #earthobservation #slope #geomorphons #hillshade #geomorphometry #geomorphology #topography #Equi7 #terrainheight #DigitalTerrainModel #landform

GEDTM30 – A Global 1-Arc-Second (~30m) Digital Terrain Model (DTM)
--
https://github.com/openlandmap/GEDTM30 <-- shared GitHub repository
--
#GIS #spatial #mapping #opendata #global #DTM #GEDTM30 #GitHub #30m #landsurface #parameters #documentation #hydrology #remotesensing #earthobservation #slope #geomorphons #hillshade #geomorphometry #geomorphology #topography #Equi7 #terrainheight #DigitalTerrainModel #landform

GEDTM30 – A Global 1-Arc-Second (~30m) Digital Terrain Model (DTM)
--
https://github.com/openlandmap/GEDTM30 <-- shared GitHub repository
--
#GIS #spatial #mapping #opendata #global #DTM #GEDTM30 #GitHub #30m #landsurface #parameters #documentation #hydrology #remotesensing #earthobservation #slope #geomorphons #hillshade #geomorphometry #geomorphology #topography #Equi7 #terrainheight #DigitalTerrainModel #landform

GEDTM30 – A Global 1-Arc-Second (~30m) Digital Terrain Model (DTM)
--
https://github.com/openlandmap/GEDTM30 <-- shared GitHub repository
--
#GIS #spatial #mapping #opendata #global #DTM #GEDTM30 #GitHub #30m #landsurface #parameters #documentation #hydrology #remotesensing #earthobservation #slope #geomorphons #hillshade #geomorphometry #geomorphology #topography #Equi7 #terrainheight #DigitalTerrainModel #landform

GEDTM30 – A Global 1-Arc-Second (~30m) Digital Terrain Model (DTM)
--
https://github.com/openlandmap/GEDTM30 <-- shared GitHub repository
--
#GIS #spatial #mapping #opendata #global #DTM #GEDTM30 #GitHub #30m #landsurface #parameters #documentation #hydrology #remotesensing #earthobservation #slope #geomorphons #hillshade #geomorphometry #geomorphology #topography #Equi7 #terrainheight #DigitalTerrainModel #landform

[Canadian] National Elevation Data Strategy Newsletter [NRCAN]
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https://gogeomatics.ca/national-elevation-data-strategy-a-significant-coverage-increase/ <-- shared technical newsletter
--
#GIS #spatial #mapping #remotesensing #LiDAR #elevation #opendata #airborneLiDAR #AutomaticallyExtractedBuildings #buildingfootprints #Canada #CanElevation #CGVD2013 #CopernicusDEM #dataacquisition #digitalelevationmodel #DEM #Digitalsurfacemodel #DigitalTerrainModel #DSM #DTM #elevationproducts #FloodHazardMapping #geographicdata #highresolutiondata #HRDEM #HRDEMmosaic #PointCloud #mediumresolutionelevationmodel #MRDEM #NAD83 #NationalElevationDataStrategy #NRCAN #topographicaldata #vectorformat #flood #flooding #extremeweather #climatechange #naturalhazard #risk #hazard #datacoverage
@NRCAN

[Canadian] National Elevation Data Strategy Newsletter [NRCAN]
--
https://gogeomatics.ca/national-elevation-data-strategy-a-significant-coverage-increase/ <-- shared technical newsletter
--
#GIS #spatial #mapping #remotesensing #LiDAR #elevation #opendata #airborneLiDAR #AutomaticallyExtractedBuildings #buildingfootprints #Canada #CanElevation #CGVD2013 #CopernicusDEM #dataacquisition #digitalelevationmodel #DEM #Digitalsurfacemodel #DigitalTerrainModel #DSM #DTM #elevationproducts #FloodHazardMapping #geographicdata #highresolutiondata #HRDEM #HRDEMmosaic #PointCloud #mediumresolutionelevationmodel #MRDEM #NAD83 #NationalElevationDataStrategy #NRCAN #topographicaldata #vectorformat #flood #flooding #extremeweather #climatechange #naturalhazard #risk #hazard #datacoverage
@NRCAN

[Canadian] National Elevation Data Strategy Newsletter [NRCAN]
--
https://gogeomatics.ca/national-elevation-data-strategy-a-significant-coverage-increase/ <-- shared technical newsletter
--
#GIS #spatial #mapping #remotesensing #LiDAR #elevation #opendata #airborneLiDAR #AutomaticallyExtractedBuildings #buildingfootprints #Canada #CanElevation #CGVD2013 #CopernicusDEM #dataacquisition #digitalelevationmodel #DEM #Digitalsurfacemodel #DigitalTerrainModel #DSM #DTM #elevationproducts #FloodHazardMapping #geographicdata #highresolutiondata #HRDEM #HRDEMmosaic #PointCloud #mediumresolutionelevationmodel #MRDEM #NAD83 #NationalElevationDataStrategy #NRCAN #topographicaldata #vectorformat #flood #flooding #extremeweather #climatechange #naturalhazard #risk #hazard #datacoverage
@NRCAN

[Canadian] National Elevation Data Strategy Newsletter [NRCAN]
--
https://gogeomatics.ca/national-elevation-data-strategy-a-significant-coverage-increase/ <-- shared technical newsletter
--
#GIS #spatial #mapping #remotesensing #LiDAR #elevation #opendata #airborneLiDAR #AutomaticallyExtractedBuildings #buildingfootprints #Canada #CanElevation #CGVD2013 #CopernicusDEM #dataacquisition #digitalelevationmodel #DEM #Digitalsurfacemodel #DigitalTerrainModel #DSM #DTM #elevationproducts #FloodHazardMapping #geographicdata #highresolutiondata #HRDEM #HRDEMmosaic #PointCloud #mediumresolutionelevationmodel #MRDEM #NAD83 #NationalElevationDataStrategy #NRCAN #topographicaldata #vectorformat #flood #flooding #extremeweather #climatechange #naturalhazard #risk #hazard #datacoverage
@NRCAN

[Canadian] National Elevation Data Strategy Newsletter [NRCAN]
--
https://gogeomatics.ca/national-elevation-data-strategy-a-significant-coverage-increase/ <-- shared technical newsletter
--
#GIS #spatial #mapping #remotesensing #LiDAR #elevation #opendata #airborneLiDAR #AutomaticallyExtractedBuildings #buildingfootprints #Canada #CanElevation #CGVD2013 #CopernicusDEM #dataacquisition #digitalelevationmodel #DEM #Digitalsurfacemodel #DigitalTerrainModel #DSM #DTM #elevationproducts #FloodHazardMapping #geographicdata #highresolutiondata #HRDEM #HRDEMmosaic #PointCloud #mediumresolutionelevationmodel #MRDEM #NAD83 #NationalElevationDataStrategy #NRCAN #topographicaldata #vectorformat #flood #flooding #extremeweather #climatechange #naturalhazard #risk #hazard #datacoverage
@NRCAN

"Oops" appears to apply widely.

These are not small errors (says Capt. Obvious). Used to drive physics of various applications, surely a signficant source of inaccuracy?

"Application to real-world landscapes in California, reveal the systematic underestimation of surface area by up to a third, and mean slope angles by up to 10° in steep topography in current DTMs."

#DTM
#DigitalTerrainModel

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109517?af=R