"ETOPO 2022 is an updated topographic–bathymetric dataset at 15 arcsec global resolution that incorporates bare-Earth datasets with forests and buildings removed. ETOPO 2022 integrates more than a dozen source datasets for land topography, sea bathymetry, lake bathymetry, and ice-sheet bed elevation data, all of which have been carefully evaluated for quality, accuracy, and seamless integration."

Quality controlled with nearly a trillion #ICESat2 #LIDAR shots.

Did some successful microwave keyhole shots back in the day, using #SRTM data. This would have been even better.

#DigitalElevationModel
#DEM

https://essd.copernicus.org/articles/17/1835/2025/

I was going to ask the #Earth #Observation community, including @EOMasters, if there were good online resources to access and process #DigitalElevationModel (DEM) data.

But just found out that my ace colleague @LukeDataManager had done a detailed workflow and published it online.

https://nordatanet.github.io/Exploring_FAIR_data_with_Python/Global_and_regional_bathymetry.html

Note to self: be more like Luke and publish my workflows

#OpenScience

[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
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#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

The Basics of LiDAR - Light Detection and Ranging - Remote Sensing [tree focused]
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https://www.neonscience.org/resources/learning-hub/tutorials/LiDAR-basics <-- shared tutorial
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[this post should not be considered an endorsement of any organisation, but is shared for learning purposes]
“LiDAR or Light Detection and Ranging is an active remote sensing system that can be used to measure vegetation height across wide areas.
This [tutorial] page… introduce[s the] fundamental LiDAR (or lidar) concepts including:
• What LiDAR data are.
• The key attributes of LiDAR data.
• How LiDAR data are used to measure trees...”
#GIS #spatial #mapping #elevation #spatialdata #spatialanalysis #data #digital #DEM #digitalelevationmodel #spatialanalysis #LiDAR #remotesensing #model #modeling #IFSAR #onlinelearning #onlinelessons #tutorial #landform #geomorphology #landforms #guide #vegetation #forest #forestry #tree #trees

🇦🇹 Dear colleagues, the session 𝗡𝗼𝘃𝗲𝗹 𝗱𝗮𝘁𝗮, 𝗺𝗲𝘁𝗵𝗼𝗱𝘀 𝗮𝗻𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗶𝗻 𝗚𝗲𝗼𝗺𝗼𝗿𝗽𝗵𝗼𝗺𝗲𝘁𝗿𝘆 at European Geosciences Union (EGU) 2024 is scheduled for Mon, 15 Apr, 10:45–12:30 (CEST) in Room G1 🟪 (orals) and 16:15–18:00 (CEST) in Hall X1 🟪 (posters)

👉 Join us to attend great oral & poster contributions!

📋 Full list of contributions & info about the session:
https://lnkd.in/dtSkqt6V

#EGU2024 #geomorphometry #spatialanalysis #spatialdata #geomorphology #lidar #digitalelevationmodel

What Is A Digital Elevation Model (DEM)?- A Practical Guide
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https://equatorstudios.com/what-is-a-digital-elevation-model-dem <-- shared tutorial
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“A Digital Elevation Model (DEM) is a digital cartographic dataset that represents a continuous topographic elevation surface through a series of cells. Each cell represents the elevation (Z) of a feature at its location (X and Y). Digital Elevation Models are a “bare earth” representation because they only contain information about the elevation of geological (ground) features, such as valleys, mountains, and landslides, to name a few. They do not include any elevation data concerning non-ground features, such as vegetation or buildings...”
[read more at the link above...]
#GIS #spatial #mapping #elevation #spatialdata #spatialanalysis #data #digital #DEM #digitalelevationmodel #spatialanalysis #LiDAR #remotesensing #model #modeling #IFSAR #onlinelearning #onlinelessons #guide #tutorial #landform #bathymetry #geomorphology #geology #landforms

Does anyone know of any concrete ways the old USGS scribed map products or their derivatives are used today?

For a while, the line work was turned into raster products, I believe, and then into digital elevation models?

Do any part of of the old topo map products still have use or relevance, or have they seen their last hurrahs?

#Maps #GIS #Cartography #DigitalElevationModel #Topography